COMSOL Server Manual

COMSOL Server
Manual
COMSOL Server Manual
© 1998–2015 COMSOL
Protected by U.S. Patents listed on www.comsol.com/patents, and U.S. Patents 7,519,518; 7,596,474; 7,623,991;
8,457,932; and 8,954,302. Patents pending.
This Documentation and the Programs described herein are furnished under the COMSOL Software License
Agreement (www.comsol.com/comsol-license-agreement) and may be used or copied only under the terms of the
license agreement.
COMSOL, COMSOL Multiphysics, Capture the Concept, COMSOL Desktop, LiveLink, and COMSOL Server are
either registered trademarks or trademarks of COMSOL AB. All other trademarks are the property of their respective
owners, and COMSOL AB and its subsidiaries and products are not affiliated with, endorsed by, sponsored by, or
supported by those trademark owners. For a list of such trademark owners, see www.comsol.com/trademarks.
Version: COMSOL 5.1
Contact Information
Visit the Contact COMSOL page at www.comsol.com/contact to submit general inquiries, contact
Technical Support, or search for an address and phone number. You can also visit the Worldwide
Sales Offices page at www.comsol.com/contact/offices for address and contact information.
If you need to contact Support, an online request form is located at the COMSOL Access page at
www.comsol.com/support/case.
Other useful links include:
• Support Center: www.comsol.com/support
• Product Download: www.comsol.com/product-download
• Product Updates: www.comsol.com/support/updates
• Discussion Forum: www.comsol.com/community
• Events: www.comsol.com/events
• COMSOL Video Gallery: www.comsol.com/video
• Support Knowledge Base: www.comsol.com/support/knowledgebase
Part number: CM010010
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installing COMSOL Server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Installing COMSOL Server in Windows . . . . . . . . . . . . . . . . . 8
Installing COMSOL Server in Linux and OS X. . . . . . . . . . . 17
Firewalls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Starting COMSOL Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Starting and Running COMSOL Server Locally in
Windows. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Starting COMSOL Server as a Windows Service . . . . . . . . 22
Starting COMSOL Server Manually in Windows . . . . . . . . . 23
Starting COMSOL Server in Linux. . . . . . . . . . . . . . . . . . . . . 24
Starting COMSOL Server in OS X . . . . . . . . . . . . . . . . . . . . 25
Logging in to COMSOL Server . . . . . . . . . . . . . . . . . . . . . . . 25
COMSOL Server Administration . . . . . . . . . . . . . . . . . . . . . . . . . 26
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
User Database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Preferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Running Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Running Applications in a Web Browser. . . . . . . . . . . . . . . . 33
Running Applications in the COMSOL Client . . . . . . . . . . . 41
Running Applications that use LiveLink Products . . . . . . . . . 45
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Running COMSOL Server on Multiple Computers . . . . . . . . . . 47
Installing COMSOL Server on Multiple Computers . . . . . . 47
Starting COMSOL Server on Multiple Computers . . . . . . . 48
Setting up a Shared Working Directory . . . . . . . . . . . . . . . . 49
Sharing a COMSOL Server Installation . . . . . . . . . . . . . . . . . 50
Configuring COMSOL Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Configuring a Local User Database . . . . . . . . . . . . . . . . . . . . 52
Configuring Windows Authentication . . . . . . . . . . . . . . . . . . 55
Configuring Active Directory or LDAP . . . . . . . . . . . . . . . . . 56
Advanced Login Configuration . . . . . . . . . . . . . . . . . . . . . . . . 58
Setting Up COMSOL Server for Secure Connections . . . . 63
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Introduction
With a COMSOL Server™ license, a COMSOL application can be run in major
web browsers on platforms such as Windows®, OS X, iOS, Linux®, and
Android™. In the Windows® operating system, you can also run COMSOL
applications by connecting to a COMSOL Server with an easy-to-install
COMSOL® Client, available for download from www.comsol.com. COMSOL
Server does not include the Application Builder, Physics Builder, and Model
Builder tools that come with the COMSOL Desktop® environment.
A COMSOL runnable application is a COMSOL Multiphysics® MPH-file that in
addition to the model part includes a custom user interface that you can run as a
separate application or in a web client. To create such applications, use the
Application Builder, which is included in the Windows® version of COMSOL
Multiphysics. For more information on how to build applications, refer to the
book Introduction to Application Builder.
COMSOL Multiphysics and its add-on products are used to create an application.
A license for the same add-on products is required to run the application from
COMSOL Server. Users can run up to four applications per session through a
single COMSOL Server license.
COMSOL Server is a multiuser service that can be run continuously on the host
computer. It can be configured to start automatically upon booting. Optionally,
COMSOL Server can be run on multiple computers to support more
simultaneous users and concurrent applications than a single computer would
support.
COMSOL Server contains administrative tools that allow you to create user
accounts and user groups. You can also create user accounts based on an existing
database of users on your system.
Additional resources, including video tutorials, are available online at
www.comsol.com/video.
|5
The figure below shows the COMSOL Server web interface and an application
running in a web browser.
U SERS
AND
R OLES
IN
COMSOL S ERVER
Use the COMSOL Server web interface to assign usernames and passwords and
to grant privileges. The administrator role can add and remove users as well as
stop jobs. The user role is for running and uploading applications. The guest role
is only for running applications.
ROLE
ADD/REMOVE USERS
UPLOAD APPLICATIONS
RUN APPLICATIONS
Administrator
Yes
Yes
Yes
User
No
Yes
Yes
Guest
No
No
Yes (Web client) / No
(Native client)
6|
There is also a group concept in COMSOL Server that you can use to manage
groups of users. Use groups to grant access to different categories of applications
that are relevant to that particular group.
COMSOL Server can maintain its own database of users and groups. You can also
configure COMSOL Server to use the login mechanism of your operating system,
such as Windows® Authentication or Lightweight Directory Access Protocol
(LDAP).
|7
Installing COMSOL Server
A COMSOL Server installation is similar to a COMSOL Multiphysics installation,
the only difference being an additional step called Server.
For detailed information on installation, license files, and license management, see
the COMSOL Multiphysics Installation Guide.
Before starting COMSOL Server you need to start a license manager. For
more information on the FlexNet® license manager, see the COMSOL
Multiphysics Installation Guide. You can download the document
from www.comsol.com/iog. The FlexNet® license manager is installed
together with COMSOL Server. A license server is not needed when
running a trial license.
The default COMSOL Server installation directory for each platform is as follows:
• Windows®: C:\Program Files\COMSOL\COMSOL51\Server
• Linux®: /usr/local/comsol51/server
• OS X: /Applications/COMSOL51/Server
For information about installing COMSOL Server for multiple computers and
sharing the installation, see Running COMSOL Server on Multiple Computers.
I n s t a l l i n g C O M S O L S e r ve r i n W i n d ow s
Start the installation by using the media that you have received or by using an
Internet download. In the COMSOL installer, after selecting your preferred
language, choose New COMSOL 5.1 Installation:
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L ICENSE
In the next step, License, you are prompted for a passcode or license file.
COMSOL Server will only function with a license file (that you get from your
COMSOL representative).
At this point, the COMSOL installer detects the type of license file used. The
following instructions assume that the license file used during installation
corresponds to a COMSOL Server license.
|9
P LATFORMS
On the next screen—the Platforms step—you select the type of platform. The
example below shows the Platforms screen for a Windows® installation with
options for installing on a 32-bit or 64-bit operating system.
P RODUCTS
In the next step, Products, select the installation location and which software
products and components you want to install. Licensed software components are
10 |
selected by default. There are options to include application libraries and software
components for the add-on products.
O PTIONS
In the Options step, you can choose to install Start menu shortcuts (Windows®
operating system only), install COMSOL Client, install LiveLink™ for Excel®
(only available if you have licensed LiveLink™ for Excel®)for all users, enable
checking for updates after installation, and specify the location for a MATLAB®
installation (only available if you have licensed LiveLink™ for MATLAB®). You can
also select the type of installation from the Select installation type list: Primary (the
default) or Secondary. When running COMSOL Server on multiple computers,
the main server will be the primary server and the rest will be secondary servers.
If not installing COMSOL Server to run on multiple computers, choose Primary.
For information about installing COMSOL Server for multiple computers, see
Running COMSOL Server on Multiple Computers.
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If you install over the Internet using a proxy server, you can specify the host name,
port number, and, optionally, a username and password if required. If you do not
enter a port number, COMSOL uses port 443, which is the default port setting
for the HTTPS protocol. These settings do not appear if you do not perform an
installation via the Internet.
S ERVER
The next Server step does not have any corresponding step in the COMSOL
Multiphysics installer but is unique to a COMSOL Server installation. This step
makes it possible to set up COMSOL Server as a Windows® service and enables
12 |
you to configure an initial user database. The Server page in the COMSOL
Installer includes the following settings (see the following sections):
Settings for Launching COMSOL Server
The basic setting is the Default COMSOL Server port, which is set to 2036. By
default, COMSOL Server uses a range of ports from 2036 and above.
There are two different ways to install COMSOL Server in Windows®. If you
select the Install COMSOL Server as a Windows service check box (the default), then
COMSOL Server is installed as a Windows® service. Otherwise COMSOL Server
is installed as a regular executable. Use the Startup list to configure how to start
COMSOL Server when installed as a Windows® service. Choose Disabled, Manual,
Automatic (the default), or Automatic (Delayed Start). With the default choice of
Automatic, the installed COMSOL Server service is configured to start
automatically when the host computer boots or restarts. This setting provides the
highest availability to users of the installed server. With Automatic (Delayed Start)
the service also starts automatically but delayed until all automatic-start threads
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have finished starting. If you select Manual or Disabled, the COMSOL Server
service will not be started after the installation.
If you choose Manual or Disabled for the COMSOL Server service’s
Startup setting, you can enable or start the services from the command
line or by using the Manage local services shortcut installed on the Start
menu in Windows®. The same configuration options are also available in
the snap-in Services in the Microsoft Management Console (search for
services from the Windows® Control Panel).
By default, the installer provides the predefined LocalService service account in
the Service account field. It is recommended that you use the LocalService
account to run COMSOL Server service if you run COMSOL server on a single
computer; it has sufficient but limited privileges intended for running local
services. Alternatively, another account with limited privileges can be used, as long
as it has the Log On As A Service right. The predefined LocalService,
LocalSystem, and NetworkService accounts in Windows® have no password.
When using other accounts, you have to provide a password.
Creating a Default Local Administrative User for COMSOL Server
Select the Create default local administrative user check box to create a default
username and password for an administrator account that is provided when
COMSOL Server is installed as a Windows® service. You can use that account to
log in to the web interface after installation to perform administrative tasks. In
addition to this administrator, which is local to the COMSOL Server user
database, you can add administrator accounts using Windows authentication (see
below).
The user account entered here can only be used to log in to
COMSOL Server running as a Windows®service. If COMSOL
Server is not installed as a service, it will ask for a default username
and password when it is first launched.
If you do not create a default local administrator when COMSOL Server is
installed as a service, you cannot log in using the COMSOL Server web interface
unless at least one user is configured with Windows® Authentication or LDAP, for
Linux® and OS X, holding the administrative role. You can also configure the
administrator later by manually editing configuration files.
14 |
Support Running COMSOL Server on Multiple Computers
For information about the settings for running COMSOL Server in multiple
computers, see Running COMSOL Server on Multiple Computers.
Using Windows Authentication
Select Use Windows authentication to use Windows® authentication in addition to
the users from the local user database and the administrator you may have chosen
to provide in the settings above. Windows® authentication is only available when
you install COMSOL Server on a computer using the Windows® operating
system.
The text fields under Windows authentication mapping for Administrators, Users,
and Guests associate Windows® groups or built-in security principals, separated by
semicolons, with COMSOL Server roles for administrators, users, and guests,
respectively. The defaults are BUILTIN\Administrators, BUILTIN\Users, and
BUILTIN\Guests, respectively, which refer to users in such Windows® groups on
the computer where you install COMSOL Server. Click the corresponding Check
Names button to verify that the group names are valid. If you type only a name
(Guests, for example), the installer finds its location and prepends it in the text
field when you click Check Names. You can only map a specific Windows® group
to a single COMSOL Server role.
You must make sure the Windows® groups you associate with the
roles exist in your Windows® installation, otherwise the mapping
for the missing groups will not be in effect until they are created.
If you leave one of the roles text fields empty, no user will be given
this role.
See Configuring COMSOL Server for more information about Windows®
authentication.
Using LDAP Authentication
LDAP configuration is required after the installation. See Configuring COMSOL
Server.
| 15
I NSTALL
The Install step lets you monitor the installation progress.
16 |
F INISH
The last step Finish lets you view an installation log in the case there are warnings
or errors.
I n s t a l l i n g C O M S O L S e r ve r i n L i nu x a n d O S X
When installing in the Linux® and OS X operating systems the Server step contains
the setting for the Default COMSOL Server port and for creating a default
administrative user account. You can also select to support running COMSOL
Server on multiple computers (see Running COMSOL Server on Multiple
Computers).
See Starting COMSOL Server for more information about how to automatically
launch COMSOL Server after installation on Linux® and OS X.
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C REATING
A
D EFAULT L OCAL A DMINISTRATIVE U SER
FOR
COMSOL S ERVER
Select the Create default local administrative user check box and provide a
username and password to create a default administrative account that is provided
when COMSOL Server is started as a service.
If you do not create an administrator, you can start COMSOL Server as the user
you intend COMSOL Server with and manually enter an administrative username
and password.
For security reasons, it is not recommended to use an account with administrative
privileges to run COMSOL Server.
F i rew a l l s
By default, COMSOL Server uses a range of ports from 2036 and above. You
must open up firewalls that exist between the server and your users. Open up for
incoming TCP connections to those ports. To improve security, you may reduce
the IP address range to known potential IP addresses for your users.
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Starting COMSOL Server
S t a r t i n g a n d R u n n i n g C O M S O L S e r ve r L o c a l ly i n
Windows
This section describes the steps that are necessary for starting and running
COMSOL Server locally on a Windows® computer. These instructions apply if
COMSOL Server will be used locally by a single user or if COMSOL Server will
run on a computer that is not connected to a network.
For making COMSOL Server available to other users or for running in OS X or
Linux®, see the subsequent sections.
When installing and running COMSOL Server locally according to the
instructions below, you will be running as an administrative user.
Before starting COMSOL Server you need to start a license manager. For more
information on the FlexNet® license manager and license files, see the COMSOL
Multiphysics Installation Guide. You can download that document from
www.comsol.com/iog. The FlexNet® license manager is installed together with
COMSOL Server. A license server is not needed when running a trial license.
From the Start Menu, select LMTOOLS. This starts the license manager utility
program.
| 19
In the first Service/License File page, select Configuration using Services.
This setting allows the license manager to start automatically when your computer
is rebooted.
Click the Config Services page.
In this page you specify the path to:
• the license manager executable file lmgrd.exe
• the license file license.dat
• a debug log file (optional)
The license manager executable file and the license file are located in the
installation directory. By default the locations are:
C:\Program Files\COMSOL\COMSOL51\Server\license\win64\lmgrd.exe
and
C:\Program Files\COMSOL\COMSOL51\Server\license\license.dat
20 |
respectively. Note that when browsing to the location of the license file you need
to change the filter of the file browser from the default .lic to .dat, as shown in
the figure below.
The license file is automatically copied to the license directory by the COMSOL
Server installer. In addition, if the original license file given to you by your
COMSOL representative had a different name it will automatically be changed to
license.dat.
For the license manager to start automatically if your computer is rebooted, select
the Use Services and Start Server at Power Up check boxes.
To save your settings, click Save Service.
The next step is to start the license manager. Go to the page Start/Stop/Reread.
Click Start Server. (Server in this context refers to the license manager server
software and not COMSOL Server.) If the license manager started successfully, a
message Server Start Successful is displayed at the bottom of the window.
If the server failed to start, refer to the COMSOL Multiphysics Installation Guide.
If installed as a service, COMSOL Server will by default be started after
installation; otherwise, see the following sections on starting COMSOL Server
before continuing.
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You can now log in to COMSOL Server from a web browser or COMSOL Client.
Assuming you are logging in from a web browser, start your web browser and type
http://localhost:2036 in the address bar.
You are now prompted for the username and password that you specified during
the installation. You can now continue reading the section Running Applications.
S t a r t i n g C O M S O L S e r ve r a s a W i n d ow s S e r v i c e
By default, COMSOL Server is installed as a Windows® service that is set to start
automatically. In this case, a link to the COMSOL Server web interface is installed
on the Start menu as COMSOL Server. See Logging in to COMSOL Server for more
information about accessing the web interface.
To manually start or stop the COMSOL Server service, or to configure if it is
started automatically, use the Manage local services shortcut installed on the Start
menu. The same configuration options are also available in the snap-in Services, in
22 |
the Microsoft Management Console (search for services from the Windows Control
Panel).
Before logging in to COMSOL Server you need to start a license
manager. For more information on the FlexNet® license manager, see the
COMSOL Multiphysics Installation Guide. You can download the
document from www.comsol.com/iog. The FlexNet® license manager
is installed together with COMSOL Server.
S t a r t i n g C O M S O L S e r ve r M a nu a l ly i n W i n d ow s
You can start COMSOL Server by using the shortcut installed on the Start menu
as COMSOL Server, by double-clicking the Windows® executable in a file browser,
or from the command window.
When COMSOL Server has been installed as a Windows service, the
shortcut for starting manually is not available on the Start menu. It is not
recommended to start COMSOL Server manually when the service is
running. Since the service runs under a special system user account, it
does not share its application and user database with COMSOL Server
started manually.
The COMSOL Server executable is located at:
<Installation directory>\bin\win64\comsolserver.exe
where win64 corresponds to a 64-bit installation (win32 for a 32-bit installation).
An example of a typical <Installation directory> is:
C:\Program Files\COMSOL\COMSOL51\Server\bin\win64
To start COMSOL Server from a command window, type
<Installation directory>\bin\win64\comsolserver.exe
For both methods of starting COMSOL Server, the command window displays a
short message that COMSOL Server has started and which port number is used.
In case the default port number 2036 is busy, subsequent port numbers are
searched until a free port number has been found.
| 23
If you are starting COMSOL Server for the first time from your current account,
you are prompted for an initial administrator. You can use this administrator
account to add users with the COMSOL Server web interface. See Logging in to
COMSOL Server for how to access the COMSOL Server web interface.
S t a r t i n g C O M S O L S e r ve r i n L i nu x
To start COMSOL Server manually, type
<Server installation>/bin/comsol server
If you are starting COMSOL Server for the first time from your current account,
you are prompted for the initial administrator of COMSOL Server. You can use
this administrator account to add users with the COMSOL Server web interface
(see Logging in to COMSOL Server).
For COMSOL Server to start automatically at boot up, you need to add Bourne
shell commands to the appropriate boot script. You must be a superuser (root) to
edit boot scripts.
For security reasons, it is recommended that the daemons are not started
as a user with administrative privileges. Instead, use a dedicated username
to start the license manager.
Add the following text to the end of the file rc.local in the /etc directory of
your Linux® system:
FP=<Server installation>
MYUSER=username
if [ -x $FP/bin/comsol ]; then
su $MYUSER -c "umask 022; $FP/bin/comsol service"
fi
The comsol service command is equivalent to
comsol server -silent -login never &
Replace the installation directory with your actual installation directory, and
username with the username that you want to have to run the service.
You should not use the root user or another user with system access.
Create a special user for COMSOL Server with limited system access.
24 |
S t a r t i n g C O M S O L S e r ve r i n O S X
To start COMSOL Server manually, type
<Installation directory>/bin/comsol server
If you are starting COMSOL Server for the first time from your current account,
you are prompted for an initial administrator of COMSOL Server. You can use
this administrator account to add users with the COMSOL Server web interface.
L og gi n g i n t o C OM S OL Se r ve r
In a web browser, go to http://localhost:2036 (if you are accessing it
remotely, use the computer name—computer name and domain, or the local IP
address—of your server instead of localhost). The default port number is 2036 or
the number given during installation. If that port is not available, then COMSOL
Server will use the next available port number: 2037, 2038, and so on. Log in to
COMSOL Server with your username and password.
Press return or click Log in to COMSOL Server. If you log in for the first time, you
must also read the COMSOL Software License Agreement and click Accept to
enter the COMSOL Server web interface. A user only needs to accept the license
agreement once.
After five failed consecutive attempts to log in to COMSOL Server using the web
interface, you will be locked out for five minutes before you can log in again.
You can log out from COMSOL Server by clicking Logout in the upper-right
corner of the COMSOL Server web interface.
As an alternative to logging in from a web browser, you can log in from the
COMSOL Client for Windows®. For more information see Running Applications
in the COMSOL Client.
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COMSOL Server Administration
Ove r view
COMSOL Server can be managed through its web interface. Log in using an
administrator username and password. Once logged in you have access to an
Administration section in the web interface with windows for Monitor, Sessions,
User Database, and Preferences.
The figure below shows the main page in the COMSOL Server web interface
when logged in as an administrator.
Users cannot access the Administration tools; guests cannot access the
Administration tools and cannot upload applications.
See also Setting Up COMSOL Server for Secure Connections.
26 |
Monitor
On the Monitor page you find information including: the local IP address, OS and
architecture, start time and uptime, CPU and memory use, and also an overview
of the running application sessions with the session ID, application, user, start
time and uptime, and memory and CPU usage. Click the column header for a
session property to sort the application sessions alphabetically based on that
property. The Monitor panel for a server can be collapsed and expanded by clicking
on its name. Click Close to stop a session.
When running COMSOL Server on multiple computers, there is one panel for the
Primary server and one for each Secondary server. For more information, see
Running COMSOL Server on Multiple Computers.
Selecting the Show prelaunched application processes check box enables the display
of prelaunched application processes in the list of Application Sessions. A
prelaunched application process is used to speed up the launch of new applications
and does not check out any COMSOL Server license.
The Client type can be either Web or Native. Web means that the application is run
in a web browser. Native means that the application is run as a native Windows®
application using the COMSOL Client for Windows®.
| 27
User Database
On the User Database page you can add users and groups to the server’s user
database. See Adding and Editing Users and Groups.
Prefe re n c es
On the Preferences page you access server administrative preferences and settings
divided into the following sections.
G ENERAL
Under General, you can control the following settings:
• Choose the language to use for COMSOL Server from the Language list.
COMSOL Server supports the same languages as the COMSOL Desktop
user interface.
• Choose a theme for the application’s look and feel from the
Application Theme list: Choose COMSOL for a look and feel that is similar to the
COMSOL Desktop user interface, or choose COMSOL Website for a look and
feel that is more adapted for display on the web.
28 |
V ISUALIZATION
The table below summarizes the settings in the Visualization section.
SETTING
DEFAULT
DESCRIPTION
Web rendering
WebGL
Rendering method when running in a web browser:
WebGL™ or Images from server.
Server image
rendering
Software
Rendering method for images in COMSOL Server: Software
or OpenGL.
WebGL is an emerging standard for interactive 3D and 2D graphics in web
browsers. The option Images from server is used for browsers that do not support
WebGL. It renders by generating images instead of offering interactive graphics.
The Software and OpenGL options are the same as in the COMSOL Desktop
environment but are here used for image rendering for the purpose of image
export in an application. The COMSOL Client for the Windows® operating
system provides the same interactive graphics rendering options as the COMSOL
Desktop user interface: OpenGL, DirectX, and Software. These options are chosen
from the COMSOL Desktop Startup menu icons.
S ESSIONS
The table and associated figure below summarizes the settings in the Sessions
section.
SETTING
DEFAULT
DESCRIPTION
Prelaunch application
processes
On
Prelaunching allows fast launch of an application
but requires more resources on the server
computer.
Max number of
concurrent applications
per user
4
The maximum number of concurrently running
applications per user is four. You can use a lower
number to restrict the number of concurrent
applications per user.
Idle timeout (s)
0
The maximum idle time in seconds before the user
is thrown out and the applications started by that
user are shut down. This option makes it possible
to reduce resources and licenses required on the
server. The default (0) is an infinite timeout time.
Total timeout (s)
0
The maximum total elapsed time in seconds
before the user is thrown out and the applications
started by that user are shut down. This option
makes it possible to reduce resources and licenses
required on the server. The default (0) is an infinite
timeout time.
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M ULTICORE
The table below summarizes the settings in the Multicore section.
SETTING
DEFAULT
DESCRIPTION
Number of cores
Off
Determines if the number of cores assigned to
each application is determined automatically or
by manual input.
Manual
All cores
Number of cores assigned to each application in
the manual case.
Each user may have up to four (4) applications running at the same time.
Assuming that intense computations are performed only with one of these
applications at a time, then the best performance is achieved with one core per
user. Adjust the Number of cores setting accordingly with respect to expected
number of concurrent users, concurrently running applications, and the number
of cores on the computer hosting COMSOL Server.
E MAIL
In this section you can define the settings for sending emails from applications:
SETTING
DESCRIPTION
Host
The email server’s host name.
Port
The port number (default: 25)
Connection security
Use no connection security (None; the default), or use
an encrypted connection for emails sent from
applications by selection STARTTLS or TLS/SSL.
User
The user account for logging in to the email server, if
required by the server.
Password
Password for the user account, if required by the server.
From address
The sender’s email address for emails sent from
applications.
F ILES
The table below summarizes the settings in the Files section.
SETTING
DESCRIPTION
Folder for uploaded applications
Folders for MPH-files.
Folder for user files (user:///)
Folders for files referred to in MPH-files.
30 |
SETTING
DESCRIPTION
Folder for common files
(common:///)
Common storage area for files created by applications.
Folder for temporary files
(temp:///)
Storage area for temporary files created by applications.
Show demo applications
Include the demo applications included in the shipped
Application Libraries (On; the default) or no (Off).
Do not modify these file paths when COMSOL Servers is running on
multiple computers, as the secondary servers will not see the new path.
S ECURITY
The following security settings are available in the Preferences page in the
COMSOL Server web interface when you are logged in as an administrator. (The
corresponding settings in COMSOL Multiphysics can be found on the Security
page in the Preferences dialog box, which you open from the COMSOL Desktop.)
• Select the Allow batch jobs check box to allow applications to run detachable
batch jobs (default: On). These are separate COMSOL Server processes
where the simulation is stored on file when the computation is finished. This
functionality is used in the Batch, Batch Sweep, Cluster Computing, and
Cluster Sweep nodes in the COMSOL Desktop model tree.
• Select Allow external processes and libraries to allow applications to start
external processes on the computer hosting COMSOL Server (default: Off).
This includes using the built-in executeOS() method. This setting also
allows external C libraries to be called from methods in an application. The
security settings do not extend to methods used to access the model object.
Under Methods and Java libraries:
• The Enforce security restrictions check box is selected by default. If selected,
this check box enforces the following restrictions on methods and Java
libraries:
- Select the Allow access to system properties check box to read and write values
to system properties such as System.getProperty("cs.np") which can be
used to determine the number of cores that COMSOL Server currently uses.
- Select the Allow changes to the runtime system check box to allow methods
and Java libraries to change the runtime system—for instance, by modifying
class loaders.
- From the File system access list, select Temporary and application files (the
default) to restrict methods and Java libraries to only have access to such files,
| 31
or select All files to allow methods and Java libraries to access all files that the
account used to start the COMSOL Server service (default: LocalService) has
permissions to access on the file system.
- Select the Allow access to network sockets check box to allow methods and
Java libraries to open sockets for network access.
- Select the Allow control of the network authentication method check box to
allow methods and Java libraries to control the network authentication
method used.
- Select the Allow access to classes through reflection check box to allow access
to all members in a class through reflection.
- Select the Allow access to runtime security settings check box to allow methods
and Java libraries to access security settings.
All settings above are Off by default, enforcing those security restrictions.
R ECOVERY
FOR
A PPLICATION B UILDER
The table below summarizes the settings in the Recovery section.
SETTING
DEFAULT
DESCRIPTION
Save recovery file
Off
Determines if launched applications should be
configured to automatically use recovery files.
This means that failed applications can be
recovered by accessing these files.
Folder for
recovery files
HOME\.comsol\
v51server\recoveries
Common storage area for recovery files.
Click Save to store the updated preference settings.
32 |
Running Applications
COMSOL applications can be run by connecting to COMSOL Server from a web
browser, or from a COMSOL Client for Windows®. The COMSOL Client for
Windows® allows a user to run applications that require a LiveLink™ product for
CAD, as described in Running Applications in the COMSOL Client. In addition,
the COMSOL Client for Windows® supports interactive graphics in 1D, 2D, and
3D.
Running applications in a web browser does not require any installation and no
web browser plug-ins are needed. Running an application in a web browser
supports interactive graphics in 3D using WebGL™ technology. However,
selecting objects in graphics using mouse clicks in not supported when running in
a web browser.
R u n n i n g A p p l i c a t i o n s i n a We b B rows e r
Using a web browser you can point directly to the computer name and port
number of a COMSOL Server web interface—for example,
http://abc.mycorp.com:2036. You need to provide a username and password
to log in using the web interface.
| 33
When logged in, the Application Library page displays a list of applications to run.
When logged in as user or guest, the Administration options, in the panel to the
left, are not visible.
34 |
Click Launch to run an application. Applications are run in separate tabs in the
browser.
Users can upload applications and determine which groups have access. Guests can
only run applications.
Click the Properties and Descriptions button to show a description and some
general information about that application.
| 35
In the information display, under Used Products, you find the COMSOL products
used to create and run the application.
Click the Add to Favorites button to add the application under Favorites.
Click an application under Favorites to launch it. For an application already marked
as a favorite, click the star or the Remove from Favorites button next to the
application under Favorites to remove it from the Favorites section.
36 |
U PLOADING
AND
E DITING A PPLICATIONS
As a user or administrator, you can expand the Application Library by uploading
applications (MPH-files). Click Upload, in the panel to the left, to open the Upload
Application dialog box.
Click Browse to browse and select the application to upload. Then select an option
under Visibility: Public, Group, or Private (the default). A public application is
available to all users.
An application with a group visibility is available to members of the groups that
you select under Groups. A private application is available only to the user who
uploads it.
When you have uploaded an application, a message Your application has been
uploaded appears at the top of the COMSOL Server window. Click the x to the
right of the message to remove the message. The uploaded application gets an
orange border to identify that it has recently been uploaded.
| 37
For applications that have been uploaded, click the Edit button to open the Edit
Application dialog box.
This dialog box contains a Delete button to delete the application from the
Application Library and a Save button to save any new visibility settings.
C HANGING
THE
V IEW
OF
A PPLICATIONS
To the right of the top Library menu bar, you can choose three different views of
the applications:
• The Grid View (left) is the default view, which shows an image and a title for
each application in a grid.
• The Detailed View (middle) shows the applications in a list, including a full
description and information about the author, owner, visibility, COMSOL
products used, and date that the application was uploaded. Buttons are
available to edit the application, show its properties, mark it as a favorite,
and to launch it.
• The List View (right) shows the applications in a list with their names, and
buttons are available to edit the application, show its properties, mark it as
a favorite, and to launch it.
38 |
The following image shows the detailed view:
S ORTING
AND
S HOWING A PPLICATIONS
The menu at the top of the Application Library window contains options for
sorting and filtering the applications:
• From the Sort By list, choose to sort the applications by Name
(alphabetically), which is the default, Date uploaded (showing the latest
uploaded application first), or Author.
| 39
• From the Filter list, choose All (the default), Public, All Groups, Private, or any
available group.
C HANGING P ASSWORD
Under Your Settings in the menu to the left, click Change Password to open a
Change Password dialog box where you can change the password used to log in to
COMSOL Server.
C HANGING D EFAULT E MAIL
Under Your Settings in the menu to the left, click Change Default Email to open a
Change Default Email dialog box where you can change the default recipient’s email
address for emails sent from applications unless another email address is specified
40 |
in the application.
L IMITATIONS W HEN R UNNING A PPLICATIONS
IN
WEB B ROWSERS
When you create applications for running in a web browser, it is recommended
that you use the grid layout mode in the Application Builder. This will ensure that
the user interface layout adapts to the size and aspect ratio of the browser window.
For low-resolution displays, make sure to test the user interface layout in the target
platform to check that all form objects are visible. Applications that contain
resizable graphics forms may not fit in low-resolution displays. In such cases, use
graphics with fixed width and height to make sure all form objects fit in the target
browser window.
When running in a web browser, the interactive selection of domains, boundaries,
edges, and points is not supported. The LiveLink™ products for CAD software
packages are not supported when running in a web browser.
When running COMSOL applications in web browsers for smartphones and
certain tablets, not all functionality is supported. Typical limitations include the
ability to play sounds or open documents. In addition, file upload and download
may not be supported.
Running Applications in the COMSOL Client
As an alternative to using a web browser for running applications, the COMSOL
Client for Windows® can be used to connect to COMSOL Server and run
applications natively in the Windows® operating system. This typically gives better
graphics performance and supports interactive graphics in 1D, 2D, and 3D. In
| 41
addition, the COMSOL Client for Windows® allows applications that require a
LiveLink™ product for CAD, as listed below.
To use COMSOL Client, you need to have at least Internet Explorer®
version 9 or later installed.
You can install the COMSOL Client together with COMSOL Server. You can
also download the COMSOL Client from www.comsol.com/client-download. In
the download page, you can choose between a 32-bit and a 64-bit version and the
corresponding installation files are: COMSOL51_client_win32.exe and
COMSOL51_client_win64.exe, respectively. The size of an installation file is
about 40 MB and expands to about 70 MB in the installation.
Double-click the download file to start the COMSOL Client installer:
In the next few steps of the installer, accept the license agreement and choose the
installation folder.
42 |
In the step Select Installation Options you get the options shown in the figure
below.
The following LiveLink™ products are available in the COMSOL Client:
• LiveLink™ for AutoCAD®
• LiveLink™ for Excel®
• LiveLink™ for Inventor® (One Window interface not available)
• LiveLink™ for PTC® Creo® Parametric™
• LiveLink™ for PTC® Pro/ENGINEER®
• LiveLink™ for Revit®
• LiveLink™ for Solid Edge®
• LiveLink™ for SOLIDWORKS® (One Window interface not available)
Once installed, double-click the Desktop or Start menu icon to start.
There are three Start menu options depending on the graphics renderer you want
to use: DirectX, OpenGL, and Software. When clicking the Desktop icon, the default
OpenGL renderer will be used. If the OpenGL renderer fails to function properly—
for example, due to limitations in the graphics card—then the COMSOL Client
| 43
shuts down. The next time you start the COMSOL Client, Software rendering will
be used as a fallback renderer. The OpenGL and DirectX options use hardware
graphics acceleration and give higher performance on supported graphics cards.
The installation options also let you associate the MPH-file type with the
COMSOL Client installation.
COMSOL Client can only be used to log in to COMSOL Server with local users
(see Configuring a Local User Database). To use a non-local user account to log
in to COMSOL Server, like Windows Authentication or LDAP, first log in to the
web GUI and then use Set Password under Your Settings to set a local password
that can be used with COMSOL Client using the username of the non-local
account.
If you select the Encryption check box, the client tries to log in with SSL/TLS to
enable secure communication. The COMSOL Server that you connect to must be
set up with a valid certificate to support this. See Setting Up COMSOL Server for
Secure Connections.
Logging in from the COMSOL Client displays a COMSOL Server web interface
identical to that seen when logging in from a web browser. Using the COMSOL
Client, applications run as native Windows® applications in separate windows that
have a Windows® look-and-feel. For example, applications run in the COMSOL
44 |
Client may have a Windows® specific ribbon with tabs. When run in a web
browser, ribbons are represented by a toolbar.
For more information on running applications, see Running Applications in a Web
Browser.
R u n n i n g A p p l i c a t i o n s t h a t u s e L i ve L i n k P ro d u c t s
Most of the LiveLink™ products can be used in applications run with COMSOL
Server. However, in some cases the functionality is limited compared to running
| 45
with a COMSOL Multiphysics license that includes the COMSOL Desktop.
Depending on the LiveLink product, software components are installed with the
COMSOL Client or COMSOL Server. The table below summarizes where the
software components are installed and which functionality is available.
LIVELINK PRODUCT
LOCATION OF
SOFTWARE
COMPONENTS
FUNCTIONALITY
LiveLink™ for MATLAB®
Server
Support is limited to function calls
from the Global Definitions node in
the model tree. Can be used only
when accessing an application in a
web browser.
LiveLink™ for Excel®
Client
.Loading and saving files is
supported.
LiveLink™ for SOLIDWORKS®
Client
Same as COMSOL Desktop, with
the exception that the One
Window interface is not supported.
Not supported when running
applications in a web browser.
LiveLink™ for Inventor®
Client
Same as COMSOL Desktop, with
the exception that the One
Window interface is not supported.
Not supported when running
applications in a web browser.
LiveLink™ for AutoCAD®
Client
Same as COMSOL Desktop. Not
supported when running
applications in a web browser.
LiveLink™ for Revit®
Client
Same as COMSOL Desktop. Not
supported when running
applications in a web browser.
LiveLink™ for PTC® Creo® Parametric™
Client
Same as COMSOL Desktop. Not
supported when running
applications in a web browser.
LiveLink™ for PTC® Pro/ENGINEER®
Client
Same as COMSOL Desktop. Not
supported when running
applications in a web browser.
LiveLink™ for Solid Edge®
Client
Same as COMSOL Desktop. Not
supported when running
applications in a web browser.
46 |
Running COMSOL Server on Multiple Computers
Running COMSOL Server on multiple computers allows for supporting more
simultaneous users and concurrent applications than a single computer would
support. The main COMSOL Server instance is called Primary and the rest are
called Secondary. The Primary server is used for all incoming connections—for
example, to show the web interface or to run applications in a web browser or with
COMSOL Client. The actual work of running the applications is offloaded to the
Secondary server computers.
A prerequisite for running COMSOL Server on multiple computers is
that there is a Shared working directory on the network that is accessible
by all Primary and Secondary servers. The user account that is used to run
the COMSOL Server instances should have read and write access to this
directory. See Setting up a Shared Working Directory for information
about how to do this using the Windows operating system, and refer to
other documentation sources for sharing a directory on Linux or OS X.
I n s t a l l i n g C O M S O L S e r ve r o n M u l t i p l e C o m p u t e r s
The installation of COMSOL Server on multiple computers is similar to a regular
COMSOL Server installation. You first install the Primary COMSOL Server on
one computer and then install Secondary COMSOL Servers on the other
computers. During the installation you point out a Shared working directory on
the network that must be accessible for COMSOL Server on all of the installed
computers.
Optionally it is possible to share a common installation folder on the
network for all computers running COMSOL Server, both Primary and
Secondary. See the Sharing a COMSOL Server Installation for more
information.
I NSTALLING
THE
P RIMARY COMSOL S ERVER
On the Options page of the installer, choose Primary. On the Server page of the
installer, select the Support running COMSOL Server on multiple computers check
| 47
box and browse to your Shared working directory. The subdirectory v51server
will be appended to the working directory path to keep different versions of
COMSOL Server apart. Under Primary server hostname, the installer fills in a
guess for the hostname that the Secondary servers should use to contact the
Primary server. This should be a valid hostname that resolves to the primary
computer’s IP address.
When installing the primary COMSOL Server as a Windows service, the service
account must be able to access the shared working directory on the network. For
this reason, the default Service account changes from LocalService to NetworkService
when you select the Support running COMSOL Server on multiple computers check
box on the Server page. The NetworkService account presents itself as the
computer’s credential on the network, allowing it to access network shares
without a regular user account.
If installing COMSOL Server as a Windows service on a computer that is
not joined to a domain, the NetworkService account cannot be used
because computer credentials are not valid on work group networks. A
local user account should be entered instead in the Service account field.
I NSTALLING
THE
S ECONDARY COMSOL S ERVER
On the Options page of the installer, choose Secondary. On the Server page of the
installer, browse to your Shared working directory under Secondary COMSOL Server
settings to automatically load the settings used during the primary installation for
the Primary server hostname, Primary server port, and Primary server username
fields. If the loaded settings are not correct you can edit them before continuing,
for example if the secondary server would have to use a different hostname to
reach the primary server.
The path to the Shared working directory does not necessarily have to be identical
for the primary and secondary installation, as long as it points to the same directory
on all installations. For example, the path could be written as
\\ServerName\shared\v51server on Windows and
/mnt/servername/shared/v51server on Linux.
S t a r t i n g C O M S O L S e r ve r o n M u l t i p le C o m p u t e r s
The primary COMSOL Server is started similarly to a regular COMSOL Server
installation, either automatically or manually, which is described in Starting
48 |
COMSOL Server. Once the primary COMSOL Server has started, you can log in
with an administrative user and check on the Monitor page that the secondary
COMSOL Servers have connected.
Secondary COMSOL Servers are also started similarly to a regular COMSOL
Server installation. Once the secondary COMSOL Servers are started they
periodically try to connect to the primary COMSOL Server. This means that the
starting order of the primary and secondary COMSOL Servers is not important
Settin g up a Sh ared Wo r king Director y
S HARING
A
D IRECTORY
IN
W INDOWS
The following steps provide a basic procedure for setting up a Shared working
directory in Windows® for installing COMSOL Server on multiple computers:
1 Create a new folder in a convenient location on the computer that should host
the share.
2 Right-click the folder and choose Share with>Specific people.
3 Type Everyone and click Add.
4 Change Read to Read/Write next to Everyone.
5 Click Share.
6 Note the network path to the shared folder (for example,
\\ServerName\shared). This is what you will use during the installation.
Note that this procedure will give anyone on the network access to the share. Once
you know which user accounts and server computers that need to access the share
it is recommended to limit the access to those. Exactly how the shares should be
set up depends on for which user account COMSOL Server has been installed.
The default on Windows is the NetworkService user in the multiple computer
case. This is a special account with limited capabilities, which presents itself as the
computer on the network, not any specific user. In this case, the shares can be
secured as follows:
1 Right-click the shared folder and choose Properties, then switch to the Security
tab.
2 Click Edit, make sure Everyone is selected and click the Remove button to
remove access to everyone.
3 Click Add, then Object Types and make sure Computers is selected in the list.
| 49
4 Click OK and type a semicolon-separated list of all the computers where
COMSOL Server runs under the NetworkService account. (Alternatively, if
NetworkService has not been used, enter the accounts that COMSOL Server
runs under.)
5 Click OK and verify that the entries are added to the list.
6 Select the new entries and select the Full control check box (under Allow) for
each one.
7 Click OK and Close.
Network administrators can also make use of groups to more easily manager access
to the shared directory.
S HARING
A
D IRECTORY
IN
L INUX
OR
M AC
Consult the documentation that came with the operating system for information
about sharing directories on the network.
S h a r i n g a C O M S O L Se r ve r I n s t a l l a t i o n
As an alternative to installing the secondary COMSOL Servers separately on each
computer, it is possible to launch the secondary COMSOL Server processes from
the primary installation directory. To do this, first make sure that the computers
that should run the secondary COMSOL Servers have read access to the primary
installation directory over the network. Then use the procedure described in the
following subsections to launch the secondary COMSOL Server.
When secondary COMSOL Servers are launched from the primary installation
directory, their settings are read from a separate set of secondary .ini files, which
are created during the primary installation. This is similar to the automatic loading
of settings from the Shared working directory during a separate secondary
installation.
L AUNCHING T HROUGH
A
S HORTCUT
IN
W INDOWS
On the computer that should run the secondary COMSOL Server, do the
following:
1 Navigate to the primary installation directory (for example,
\\ServerName\installation\COMSOL51\Server\bin\win64).
2 Right-click comsolserver.exe and choose Create Shortcut. Accept to have it
on the desktop because you cannot write to the installation directory.
50 |
3 Locate the new shortcut, right-click, and open the Properties. Add -secondary
to the end of the Target field.
4 Double-click the shortcut to launch the secondary COMSOL Server.
I NSTALLING
AS A
S ERVICE
IN
W INDOWS
On the computer that should run the secondary COMSOL Server, do the
following:
1 Open an administrative console (Windows-key + type cmd + right-click it and
choose Run as Administrator).
2 Enter the following command (notice that the spaces after, but not before, the
equal signs are mandatory; adapt the network path to match your installation):
sc create "COMSOLSecondaryService" binpath=
\\ServerName\installation\COMSOL51\Server\bin\win64\
comsolservicesecondary.exe
obj= "NT AUTHORITY\NetworkService" password= "" start= auto
3 The service is now installed. Enter this command to start it:
sc start "COMSOLSecondaryService"
L AUNCHING
ON
L INUX
AND
M AC
Use the procedure described in Starting COMSOL Server but append the
-secondary flag to the command.
| 51
Configuring COMSOL Server
To operate COMSOL Server, you must set up user authentication (password
validation) and authorization (groups and roles) for your users.
One administrator account can be added during installation. You can also
create an administrator after installation using comsolserver.exe in
the Windows® operating system or comsol server in the OS X and
Linux® operating systems.
COMSOL Server can maintain its own local user database. This is the easiest way
to set up the server. In addition, you can use your operating system’s user
authentication method.
Using the authentication method of your operating system is only
supported when accessing COMSOL Server from a web browser. To use
this method to log in to COMSOL Server with COMSOL Client, first log
in using a web browser and then use Set Password under Your Settings
to set a local password that can be used with COMSOL Client using the
username of the account.
C o n f i g u r i n g a L o c a l U se r D a t a b a s e
Using the COMSOL Server installer, you can set up an initial administrator
account that is available when COMSOL Server is started as a service. When
COMSOL Server is not started as a service, the initial administrator account is
created the first time it is started.
You can add more users to the local user database as soon as COMSOL Server is
started. These users are automatically added to the local user database of your
COMSOL Server installation.
52 |
A DDING
AND
E DITING U SERS
AND
G ROUPS
When you run COMSOL Server as administrator, you have access to a User
Database page under Administration in the menu on the left side of the COMSOL
Server web interface.
From this page you can manage users and groups for running and accessing
applications. Under Users, you see all users with their username, role, groups they
belong to, and status (if the user is logged in or not). Click a column header for a
user property to sort the users in alphabetical order based on that property. Click
the Edit User button to open an Edit User dialog box for a user, where you can
change the username, set a default email address, and change the password, role,
and which groups the user belongs to.
| 53
Click Save to store the new user properties. You can also click Log Out User to log
out a user that is currently logged in, or click Delete to remove a user from the list.
Adding a New User
To add a new user, click the Add New User button.
In the New User dialog box, specify the Username and Password (you need to
confirm the password in the Repeat password field). Also enter a default email
address in the Default email field. Under Role, click Administrator, User (the
default), or Guest, depending on the role that you want the user to have (see Users
and Roles in COMSOL Server). Under Groups, select the check boxes for the
available groups that you want the new user to belong to. Finally, click Save to
store the new user and its properties. The new user then appears in the list under
Users.
54 |
Adding Groups
You can use groups to ensure that users assigned to the same group can view and
run the same applications. Available groups appear on the User Database page
under Groups. To add a new group, click the Add New Group button.
In the New Group dialog box, enter a Group name and then click Save. The added
group then appears in the list under Groups.
You can control the visibility of the applications so that they are available only for
users within a certain group (or groups). Click the Delete Group button next to a
group to remove that group.
C o n f i g u r i n g W i n d ow s A u t h e n t i c a t i o n
In addition to the local user database, the COMSOL Server installer for the
Windows® operating system makes it possible to use Windows® authentication.
To determine which Windows users are allowed to log in, and which COMSOL
Server roles they should have, you set up a mapping between Windows® groups
and COMSOL Server roles.
You will find the login configuration file created by the installer in
<Installation>\bin\tomcat\conf\login.config . In addition, there is a sample file for
Windows® authentication available in the file
<Installation>\bin\tomcat\conf\login.win.config :
ComsolServerLogin {
waffle.jaas.WindowsLoginModule optional
principalFormat=both
roleFormat=fqn;
com.comsol.jaas.ComsolServiceLoginModule optional
authenticate=true
"BUILTIN\\Administrators"=ComsolServerAdministrator
"BUILTIN\\Users"=ComsolServerUser
"Everyone"=ComsolServerGuest;
| 55
};
ComsolWebsocketLogin {
com.comsol.jaas.ComsolServiceLoginModule required;
};
By modifying this login.win.config file and copying it to the file login.config you can
change the actual configuration used by the server and thus override any settings
made by the installer.
The lines
"BUILTIN\\Administrators"=ComsolServerAdministrator
"BUILTIN\\Users"=ComsolServerUser
"Everyone"=ComsolServerGuest;
map the Windows® groups Administrators, Users, and Everyone to the roles
identifiers ComsolServerAdministrator, ComsolServerUser, and
ComsolServerGuest, corresponding to the COMSOL Server roles
administrator, user, and guest, respectively.
For the details about settings in the configuration file, see the section Advanced
Login Configuration in this chapter.
Finally, use administration tools in Windows® to set up users and groups. For
example, use the Control Panel and the User Accounts settings in the control
panel.
Using the authentication method of your Windows® operating system is
only supported when accessing COMSOL Server from a web browser. To
use a Windows user account to log in to COMSOL Server with
COMSOL Client, first log in using a web browser and then use Set
Password under Your Settings to set a local password that can be used
with COMSOL Client using the username of the Windows account.
C o n f i g u r i n g A c t i ve D i re c t o r y o r L DA P
In addition to the local user database and to the Windows Authentication available
on the Windows® operating system, it is possible to use a Windows® Active
Directory® or LDAP server to authenticate users. This means that you can use
your Active Directory® or LDAP usernames and passwords to log in to COMSOL
Server.
56 |
Configuring COMSOL Server to use an Active Directory or LDAP server for
authentication requires editing the configuration file at:
<Installation>\bin\tomcat\conf\login.config . There is a sample file for Active
Directory® authentication available in the file
<Installation>\bin\tomcat\conf\login.ad.config :
ComsolServerLogin {
com.sun.security.auth.module.LdapLoginModule OPTIONAL
userProvider="ldap://ldap.example.com:3268/DC=example,DC=com"
authIdentity="{USERNAME}@example.com"
userFilter="(&(sAMAccountName={USERNAME})(objectclass=user))"
authzIdentity="{MEMBEROF}"
useSSL=false;
com.comsol.jaas.ComsolServiceLoginModule OPTIONAL
authenticate=true;
};
ComsolWebsocketLogin {
com.comsol.jaas.ComsolServiceLoginModule required;
};
In addition, a sample file for OpenLDAP is available in the file
<Installation>\bin\tomcat\conf\login.openldap.config :
ComsolServerLogin {
} com.sun.security.auth.module.LdapLoginModule REQUIRED
userProvider="ldap://ldap.example.com/ou=People,dc=example"
userFilter="(&(uid={USERNAME})(objectClass=inetOrgPerson))"
authzIdentity="{MAIL}"
useSSL=false;
com.comsol.jaas.ComsolServiceLoginModule required
authenticate=false;
};
ComsolWebsocketLogin {
com.comsol.jaas.ComsolServiceLoginModule required;
;
Modify the sample files and overwrite login.config with the changes to configure
Active Directory® or LDAP authentication. You need to replace
ldap.example.com, example, and com with the name of your Active Directory®
or LDAP server and DC=example, DC=com with the settings of your Active
Directory® or LDAP server, respectively.
You need to add each user and the user’s associated role to the
roles.properties file in <Installation>\bin\tomcat\conf\. COMSOL
Server will user the username and password to authenticate. Use the syntax
alice=ComsolServerAdministrator;
dave=ComsolServerUser;
carol=ComsolServerGuest;
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to add roles to the users alice, dave, and carol. ComsolServerAdministrator,
ComsolServerUser, and ComsolServerGuest are valid as the right-hand side,
representing the administrator, user, and guest roles in COMSOL Server,
respectively.
Alternatively, if a user has attempted to log in using an Active Directory® or LDAP
username, you can assign a role for that user from the COMSOL Server web
interface by editing the automatically created user account under
Administration>User Database.
The LDAP login module that COMSOL Server uses does not easily allow direct
mappings from Active Directory groups to COMSOL Server roles.
For the details about settings in the configuration file, see the section Advanced
Login Configuration in this chapter.
Active Directory® and LDAP authentication is only supported when
accessing COMSOL Server from a web browser. To use Active
Directory® and LDAP authentication to log in to COMSOL Server with
COMSOL Client, first log in using a web browser and then use Set
Password under Your Settings to set a local password that can be used
with COMSOL Client using the username of the account.
A d v a n c e d L og i n C o n f i g u r a t i o n
COMSOL Server uses the pluggable authentication mechanisms of JAAS (Java®
Authentication and Authorization Services). Using JAAS configuration files you
can configure to use Windows® authentication and LDAP authentication. You
can also combine local database users and operating system users by merging
configurations.
L OGIN M ODULE C ONFIGURATION F ILES
The COMSOL Server installation includes prepared login configuration files. Use
a suitable file, modify it, and replace the login.config file with an edited file to
configure the required login module.
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Configuration Files in <Installation>\bin\tomcat\conf
FILE NAME
FILE DESCRIPTION
ACTION
login.config
Login configuration file
Contains the login configuration that the
running server uses.
login.openldap.config
LDAP configuration
sample file
Modify and copy to login.config to use a
OpenLDAP configuration.
login.ad.config
Active Directory sample
file
Modify and copy to login.config to use a
Active Directory configuration.
login.win.config
Windows authentication
sample file
Modify and copy to login.config to use a
Windows® authentication configuration.
login.local.config
Local configuration
sample file
Modify and copy to login.config to use a
local user database configuration.
login.properties
Initial user and password
file
Created by installer. Automatically copied
to the <user home>\.comsol\v51server\
login.properties of the user account that
started COMSOL Server the first time
the service is started.
roles.properties
Initial policy group file
Created by installer. Automatically copied
to the <user home>\.comsol\v51server\
service\roles.properties of the user
account that started COMSOL Server the
first time the service is started.
The local user database is represented by two files:
• The login.properties file, which contains the local user database. Each
row in this file represents a user. The username is followed by an equal sign and
a hashed password. The file should only be readable to the account running
COMSOL Server.
• The roles.properties file, which contains the roles of the users. Each row
in this file contains a user. The username is followed by an equal sign and a
semicolon-separated list of roles and groups that the user is associated with.
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D EFAULT L OCAL A DMINISTRATIVE U SER
When you have selected the Create default local administrative user check box in
the installer, it creates:
• A local user in the file <COMSOL Server installation directory>\
bin\tomcat\conf\login.properties.
• A roles file <COMSOL Server installation directory>\
bin\tomcat\conf\roles.properties. The roles file assigns administrative
rights to the user you specify.
When COMSOL Server is started for the first time as a service, the command
<COMSOL Server Installation Directory>\bin\win64\comsolservice
copies the password and roles files from the installation directory to the service
user’s home directory in:
• <User’s home directory>\.comsol\v51server\login.properties, and
• <User’s home directory>\.comsol\v51server\server\roles.properties
For the LocalService account, the home directory typically is
C:\Windows\ServiceProfiles\LocalService
COMSOL L OGIN M ODULE
Configurable login modules are used to achieve the desired mechanism, and you
can combine multiple modules in an authentication and authorization chain.
A local user database is used by the default JAAS configuration for both
authentication (password validation) and authorization (groups and roles). A local
user account with administrative privileges can be created during the installation
process to allow subsequent login. It is also possible to configure COMSOL
Server to allow logins using nonlocal accounts optionally with a mapping from
nonlocal to local groups and roles as a part of the installation process.
The COMSOLServiceLoginModule can be used to perform authentication and
authorization of users based on the local user database or to perform mapping of
nonlocal to local roles and groups. This login module always gives administrative
privileges to the user owning the COMSOL Server process and all authenticated
users belong to the group Authenticated, which gives access to the COMSOL
Server web interface.
60 |
COMSOLServiceLoginModule Configuration Options
OPTION
VALUES
DESCRIPTION
debug
true/false
Debug information will be printed to the console.
authenticate
true/false
Determines if the module is used for
authentication or only for mapping of roles and
groups.
non-local-principal
<local-principal>
Any number of mappings from nonlocal role and
group names to local; note that multiple nonlocal
roles and groups can map to the same local roles
or groups but there can be only one mapping per
nonlocal role or group.
Other login modules: Any JAAS-compliant login modules can be
used as a part of the authentication sequence, but configuration
sometimes requires detailed knowledge about the authentication
server setup and IT system administrator skills.
JAAS C ONFIGURATION F ILE S YNTAX
The configuration file is a text file with an arbitrary name and extension containing
any number of entries of the form
RealmName{
LoginModuleClassName <behavior>
<option> = <value>;
}
RealmName is the name of the login realm this configuration represents, and for
COMSOL Server the two required realms are as follows:
• The ComsolServiceLogin realm is used for authentication of users through
the web interface.
• The ComsolWebsocketLogin realm is used for authentication of clients
connecting via websockets.
LoginModuleClassName is the full name of a class implementing the
LoginModule interface, and in addition to those provided in the Java distribution
(like com.sun.security.auth.module.LdapLoginModule), COMSOL Server
provides com.comsol.jaas.ComsolServiceLoginModule.
For integrated Windows® authentication the
waffle.jaas.WindowsLoginModule is also included in the installation.
The <behavior> can be one of the following keywords:
• required—must authenticate the user
| 61
• requisite—no subsequent login modules will run if this fails
• sufficient—continues to run the other login modules in the list on failure
• optional—at least one optional module must succeed if all are optional
The <option> is one of the valid options for the login module, and <value> is a
valid selection for this option. The configuration entry for one login module is
terminated by a semicolon, after which any number of additional login module
configuration entries can appear. However, there can be only one configuration
entry per login module.
The COMSOL Server login configuration file
installation-path/bin/tomcat/conf/login.config
is created during installation according to the selected options.
A configuration example for integrated Windows® authentication:
ComsolServerLogin {
waffle.jaas.WindowsLoginModule required
principalFormat=both
roleFormat=fqn;
com.comsol.jaas.ComsolServiceLoginModule required
authenticate=false
"BUILTIN\\Administrators"=ComsolServerAdministrator
"BUILTIN\\Users"=ComsolServerUser
"Everyone"=ComsolServerGuest;
};
In this case the user must be authenticated by the
waffle.jaas.WindowsLoginModule, and the
com.comsol.jaas.ComsolServiceLoginModule performs a mapping of
groups from the Windows® account to COMSOL Server roles without
authenticating the user.
The following is a configuration example using either the LDAP interface of an
Active Directory server for authentication or the COMSOL Server local user
database:
ComsolServerLogin {
com.sun.security.auth.module.LdapLoginModule optional
userProvider="ldap://ldap.example.com:3268/DC=example,DC=com"
authIdentity="{USERNAME}@example.com"
userFilter="(&(sAMAccountName={USERNAME})(objectclass=user))"
authzIdentity="{MEMBEROF}"
useSSL=false;
com.comsol.jaas.ComsolServiceLoginModule optional
authenticate=true
examplegroup=ComsolServerAdministrator
;
62 |
};
• If login is successful with the LdapLoginModule, the users belonging to the
group examplegroup get the ComsolServerAdministrator role.
• If login is successful with the ComsolServiceLoginModule only the local
user database is used to assign roles to the user.
S e t t i n g U p C O M S O L S e r ve r fo r S e c u re C o n n e c t i o n s
COMSOL Server can be configured to use a server certificate from a keystore file
with a password through the -keystorefile and -keystorepass command line
switches. The default keystore file location is
{COMSOL51}/bin/tomcat/conf/keystore.jks and the default password is
changeit. If the certificate is signed with a trusted root certificate by a Certificate
Authority (CA), web clients will automatically be redirected to use the secure
connection. In case the certificate is not trusted by default, the public part of it will
have to be added to the trust store used by the client. On Windows this can be
done using the Certificate snapin module for the Microsoft Management Console
(run certmgr.msc) by importing the server certificate to the trusted root
certificate issuers category, or via other centralized computer management tools.
The certificate can also be downloaded using a standard web browser by
inspecting the details of a web site or exported from the trust store on the server
computer. COMSOL Server uses the central trust store by default on Windows,
but on Mac and Linux the trust store of the Java Virtual Machine (JVM), found
in the file
{COMSOL51}/java/[glnxa64 or maci64]/jre/lib/security/cacerts is
used unless the system property javax.net.ssl.trustStore has been set. The
keytool command found in
{COMSOL51}/java/[glnxa64 or maci64]/jre/bin can be used to import the
server certificate into the trust store used by the client. Start a command window
and run
keytool -import -alias COMSOLServer -file <file.crt> -keystore <cacerts>
-trustcacerts
with the <*> entries replaced by the paths to the actual files. When prompted,
enter the keystore password (which is changeit by default for the JVM).
Note that COMSOL Server interprocess communication via websockets will also
require the certificate to be present in the trust store used by a secondary
COMSOL Server.
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To create a self-signed certificate on your computer, start a command window and
run
keytool -genkey -alias COMSOLServer -keypass <password> -storepass
<password> -dname "cn=<ServerHostName>, ou=<Org>, o=<Unit>,
c=<CountryCode>" -keyalg RSA
after having replaced the <*> entries with the information and the passwords that
you want to use. Note that the password used for the keystore by COMSOL
Server must be specified with the -keystorepass switch.
64 |
Index
A
adding groups 55
adding users 54
configuring user database 52
D
add-on products 5
default email, changing 40
deleting applications 38
administration in COMSOL Server 26
Desktop shortcut 43
administrator role 6
DirectX rendering 43
Application Library 34
applications
E
external processes and libraries 31
adding as favorites 36
deleting 38
F
file download 41
filter 40
file system access 31
launching 35
file upload 41
properties and descriptions 35
finishing installation 17
sort by 39
firewalls 18
G
upload 35
group 37
authentication 52
groups, adding 55
in Windows 15
groups, of users 7
batch jobs 31
boot scripts 24
graphics, interactive 33
grid layout mode 41
uploading 37
guest role 6, 26, 34, 35
I
Bourne shell commands 24
C
favorite applications 36
editing 37
sorting 39
B
editing applications 37
install step, installation 16
installation
changing password 40
finish 17
classes through reflection 32
install step 16
COMSOL Client 5, 25, 41
license 9
installation 11, 42
options 11
running applications in 41
platforms 10
COMSOL Multiphysics 5
server 12
COMSOL Server 5
installing COMSOL Server 8
administration 26
in Linux 17
installing 8
in OS X 17
logging in to 25
in Windows 8
starting 19
COMSOL Software License Agree-
interactive graphics 33
J
JAAS 58
ment 25
| 65
L
language, to use 28
Windows installations 12
launching applications 35
LDAP 7, 14, 15, 56
public 37
R
license, installation 9
removing users 54
resizable graphics 41
Lightweight Directory Access Protocol
roles, in COMSOL Server 6
7
running applications
LiveLink™ products 42, 43, 45
in a web browser 33
local administrative user 14
in the COMSOL Client 41
local user database 52
runtime security settings 32
logging in to COMSOL Server 25
login configuration files 58
S
secondary servers 11
security
login realm 61
restrictions 31
low-resolution displays 41
settings 31
M
Monitor page 27
server, installation 12
MPH-files 44
smartphones 41
multicore settings 30
N
O
sockets 32
network authentication method 32
software license agreement 25
network sockets 32
Software rendering 43
open documents 41
sorting applications 39
OpenGL rendering 43
Start menu shortcut 43
options, installation 11
starting COMSOL Server 19
in Linux 24
P
password, changing 40
in OS X 25
platforms, installation 10
in Windows 23
play sounds 41
system properties 31
port number 23
preferences 28
tablets 41
files 30
TCP connections 18
multicore 30
theme, for applications 28
recovery 32
U
uploading applications 35, 37
security 31
used products, in application 36
sessions 29
user authentication 52
visualization 29
user database 52
Preferences page 28
User Database page 28
primary servers 11
user role 6, 26, 34, 35
private 37
users
products, used in application
36
proxy server
66 |
T
adding 54
COMSOL Server 6
removing 54
V
visibility 37
W web browser 5
running applications in 33
web implementation of an application 5
WebGL 33
Windows Active Directory 56
Windows Authentication 7, 14, 15
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68 |

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