CR SSL VPN Installation and Configuration Guide

Cyberoam SSL VPN Installation and Configuration Guide
Important Notice
Cyberoam Technologies Pvt. Ltd. has supplied this Information believing it to be accurate and reliable at the time of printing, but
is presented without warranty of any kind, expressed or implied. Users must take full responsibility for their application of any
products. Cyberoam Technologies Pvt. Ltd. assumes no responsibility for any errors that may appear in this document.
Cyberoam Technologies Pvt. Ltd. reserves the right, without notice to make changes in product design or specifications.
Information is subject to change without notice.
USER’S LICENSE
Use of this product and document is subject to acceptance of the terms and conditions of Cyberoam End User License
Agreement (EULA) and Warranty Policy for Cyberoam UTM Appliances.
You will find the copy of the EULA at http://www.cyberoam.com/documents/EULA.html and the Warranty Policy for Cyberoam
UTM Appliances at http://kb.cyberoam.com.
RESTRICTED RIGHTS
Copyright 1999 - 2016 Cyberoam Technologies Pvt. Ltd. All rights reserved. Cyberoam, Cyberoam logo are trademark of
Cyberoam Technologies Pvt. Ltd.
Corporate Headquarters
Sophos Technologies Pvt. Ltd.,
(Formerly Cyberoam Technologies Pvt. Ltd.),
Sophos House, Saigulshan Complex,
Beside White House, Panchwati Cross Road,
Ahmedabad - 380006
GUJARAT, INDIA.
Tel: +91-79-66216666
Fax: +91-79-26407640
Web site: http://www.cyberoam.com/
Page 2 of 18
Cyberoam SSL VPN Installation and Configuration Guide
Technical Support
You may direct all questions, comments, or requests concerning the software you purchased, your
registration status, or similar issues to Customer care/service department at the following address:
Corporate Office
Sophos Technologies Pvt. Ltd.,
(Formerly Cyberoam Technologies Pvt. Ltd.),
Sophos House, Saigulshan Complex,
Beside White House, Panchwati Cross Road,
Ahmedabad - 380006
GUJARAT, INDIA.
Tel: +91-79-66216666
Fax: +91-79-26407640
Web site: www.cyberoam.com
Cyberoam contact:
Technical support (Corporate Office): +91-79-66065777
Email: support@cyberoam.com
Web site: www.cyberoam.com
Visit www.cyberoam.com for the regional and latest contact information.
Page 3 of 18
Cyberoam SSL VPN Installation and Configuration Guide
Contents
Introduction to SSL VPN ................................................................................................... 6
Concepts of SSL VPN ....................................................................................................... 6
SSL VPN Access Modes ................................................................................................................ 6
Network Resources ........................................................................................................................ 9
Installing Cyberoam SSL VPN Client............................................................................... 10
Configuring Cyberoam SSL VPN Client .......................................................................... 14
Page 4 of 18
Cyberoam SSL VPN Installation and Configuration Guide
Typographic Conventions
Material in this manual is presented in text, screen displays, or command-line notation.
Item
User
Username
Topic titles
Convention
Example
The end user
Username uniquely identifies the user of the system
Shaded
font
typefaces
Cyberoam SSL VPN Client
Subtitles
Bold & Black
typefaces
Navigation link
Bold typeface
Group Management > Groups > Create
it means, to open the required page click on Group
management then on Groups and finally click Create tab
Name
of
a
particular
parameter / field
/
command
button text
Cross
references
Lowercase
italic type
Enter policy name, replace policy name with the specific name
of a policy
Or
Click Name to select where Name denotes command button
text which is to be clicked
refer to Customizing User database Clicking on the link will
open the particular topic
Notes & points
to remember
Bold typeface
between
the
black borders
Prerequisites
Bold typefaces
between
the
black borders
Hyperlink
in
different color
Notation conventions
Note
Prerequisite
 Prerequisite details
Page 5 of 18
Cyberoam SSL VPN Installation and Configuration Guide
Introduction to SSL VPN
A Virtual Private Network (VPN) is a tunnel that carries private network traffic from one endpoint
system to another over a public network such as the Internet without the traffic being aware that
there are intermediate hops between the endpoints or the intermediate hops being aware they are
carrying the network packets that are traversing the tunnel. The tunnel may optionally compress
and/or encrypt the data, providing enhanced performance and some measure of security.
VPN is cost-effective because users can connect to the Internet locally and tunnel back to connect
to corporate resources. This not only reduces overhead costs associated with traditional remote
access methods, but also improves flexibility and scalability.
For business telecommuters or employees working from home, connecting securely to the corporate
intranets or extranets to access files or application is essential.
Hence, whenever users access the organization resources from remote locations, it is essential that
not only the common requirements of secure connectivity be met but also the special demands of
remote clients. These requirements include:
 Flexible Access: The remote users must be able to access the organization from various
locations, like Internet cafes, hotels, airport etc. The range of applications available must
include web applications, mail, file shares, and other more specialized applications required to
meet corporate needs.
 Secure connectivity: Guaranteed by the combination of authentication, confidentiality and
data integrity for every connection.
 Usability: Installation must be easy. No configuration should be required as a result of network
modification at the remote user end. The given solution should be seamless for the connecting
user.
To satisfy the above basic requirements, a secure connectivity framework is needed to ensure that
remote access to the corporate network is securely enabled.
SSL (Secure Socket Layer) VPN provides simple-to-use and implement secure access for the
remote users. It allows access to the Corporate network from anywhere, anytime and provides the
ability to create point-to-point encrypted tunnels between remote user and company’s internal
network, requiring combination of SSL certificates and a username/password for authentication to
enable access to the internal resources.
Depending on the access requirement, remote users can access through SSL VPN Client or End
user Web Portal (clientless access).
Note
 SSL VPN is not supported when Appliance is deployed in Bridge mode.
 SSL VPN feature is not available for CR15i.
Concepts of SSL VPN
SSL VPN Access Modes
When a remote user connects to the Cyberoam appliance, the Cyberoam appliance authenticates
Page 6 of 18
Cyberoam SSL VPN Installation and Configuration Guide
the user based on user name and password. A successful login determines the access rights of
remote users according to user group SSL VPN policy. The user group SSL VPN policy specifies
whether the connection will operate in Web Access mode or Tunnel Access mode.
Tunnel Access mode
Tunnel Access mode provides access to the Corporate network to remote users through laptops as
well as from Internet cafes, hotels, airport etc. It requires an SSL VPN Client at the remote end.
Remote users are required to download and install SSL VPN Client from the End-user Web Portal.
SSL VPN client establishes a SSL VPN tunnel over the HTTPS link between the web browser and
the Cyberoam appliance to encrypt and send the traffic to the Cyberoam appliance.
Cyberoam allows two types of tunneling:
 Split Tunnel: To avoid the bandwidth choking, split tunnel can be configured which ensures
that only the traffic for the private network is encrypted and tunneled while the Internet traffic is
send through the usual unencrypted route .This is configured by default and is used to avoid
bandwidth choking.
In this mode, Cyberoam acts as a secure HTTP/HTTPS gateway and authenticates the remote
users. On successful authentication, Cyberoam redirects the web browser to the Web portal.
Remote users can download SSL VPN client and configuration file for installation. Configuring
Tunnel Access mode is a two-step process:
1. Select Tunnel Access mode in VPN SSL policy
2. Assign policy to the user group
 Full Tunnel: This ensures that not only private network traffic but other Internet traffic is also
tunneled and encrypted.
For administrators, Cyberoam Web Admin console provides SSL VPN management. Administrator
can configure SSL VPN users, access method and policies, network resources, and system and
portal settings.
For remote users:
 Access End user Web Portal
 If you are installing SSL VPN Client for the first time, download bundled SSL VPN Client and
install client on desktop machine. Bundle includes installer as well as configuration file.
 If you have already installed the SSL VPN Client, download only the configuration file from End
user Web Portal and import the downloaded SSL VPN Client Configuration file.
Web Access Mode
Web Access mode provides access to the remote users who are equipped with the web browser
only and when access is to be provided to the certain Enterprise Web applications/servers through
web browser only. In other words, it offers a clientless network access using any web browser. The
feature comprises of an SSL daemon running on the Cyberoam unit and End user Web portal which
provides users with access to network services and resources.
In this mode, Cyberoam acts as a secure HTTP/HTTPS gateway and authenticates the remote
users. On successful authentication, Cyberoam redirects the web browser to the Web portal from
where remote users can access the applications behind the Cyberoam appliance. Configuring Web
Access mode is a two-step process:
1. Select Web Access mode in VPN SSL policy
2. Assign policy to the User or Group
Page 7 of 18
Cyberoam SSL VPN Installation and Configuration Guide
For administrators, Cyberoam Web Admin console provides SSL VPN management. Administrator
can configure SSL VPN users, access method and policies, user bookmarks for network resources,
and system and portal settings.
For remote users, customizable End user Web Portal enables access to resources as per the
configured SSL VPN policy.
With no hassles of client installation, it is truly a “clientless access”.
Application access mode
Application Access mode provides access to the remote users who are equipped with the web
browser and when access is to be provided to the certain Enterprise applications through web
browser only. Application access mode also offers a clientless network access using any web
browser. The feature comprises of an SSL daemon running on the Cyberoam unit and End user
Web portal which provides users with access to network services and resources.
Application access allows remote access to different TCP based applications like HTTP, HTTPS,
RDP, TELNET, SSH and FTP without installing client.
In this mode, Cyberoam acts as a secure gateway and authenticates the remote users. On
successful authentication, Cyberoam redirects the web browser to the Web portal from where
remote users can access the applications behind the Cyberoam appliance. Configuring Application
Access mode is a two-step process:
1. Select Application Access mode in VPN SSL policy
2. Assign policy to the User or Group
For administrators, Cyberoam Web Admin console provides SSL VPN management. Administrator
can configure SSL VPN users, access method and policies, user bookmarks for network resources,
and system and portal settings.
For remote users, customizable End user Web Portal enables access to resources as per the
configured SSL VPN policy.
With no hassles of client installation, it is also a “clientless access”.
Prerequisite (Remote User)




Microsoft Windows Supported – Windows 2000, Windows XP, Windows Vista, Windows 7,
Windows 8.1, Windows 10 and Windows Server 2003.
Admin Rights Required – Remote user must be logged on as Admin User or must have Admin
privilege
JRE Installation – Java Runtime Environment Version 1.8 or above must be installed
Supported Browsers – The latest version of Mozilla Firefox, Google Chrome or Internet
Explorer
Threat - Free Tunneling
Cyberoam scans VPN Tunnel Traffic (incoming and outgoing) for malware, spam, inappropriate
content and intrusion attempts, ensuring Threat-free Tunneling. Furthermore, VPN traffic is
subjected to DoS inspection, although Cyberoam does provide the option of bypassing DoS
inspection for specific traffic.
Page 8 of 18
Cyberoam SSL VPN Installation and Configuration Guide
Cyberoam does not have an exclusive port assigned for the VPN Zone like the LAN, WAN and DMZ
ports. As soon as a VPN connection is established, the port/interface used by the connection is
automatically added to the VPN zone, and on disconnection, the port is removed by itself. VPN zone
is used by both IPSec and SSL VPN traffic.
Note
Threat Free Tunneling is applicable only when SSL VPN tunnel is established through Tunnel Access
Mode.
Network Resources
Network Resources are the components that can be accessed using SSL VPN. SSL VPN provides
access to an HTTP or HTTPS server on the internal network, Internet, or any other network segment
that can be reached by the Cyberoam. The Administrator can configure Web (HTTP) or Secure Web
(HTTPS) bookmarks and internal network resources to allow access to Web-based resources and
applications.
If required, custom URL access can also be provided.
Network resources:
Resource
Accessible in Mode
Bookmarks
Web Access Mode, Application Access Mode
Bookmark Groups
Web Access Mode, Application Access Mode
Custom URLs - Not defined as Bookmark
Web Access Mode
Enterprise Private Network resources
Tunnel Access Mode
Page 9 of 18
Cyberoam SSL VPN Installation and Configuration Guide
Installing Cyberoam SSL VPN Client
Note: If a previous version of the SSL VPN Client is already installed on your Windows 10 system, you
must uninstall it and perform a fresh installation using the installer file titled
CrSSL_v1.3.1.10_Windows10.zip.
Follow the steps below for a fresh installation of the client:
a. Access the “Device Manager”.
b. Under “Network adapters”, right click on “TAP-Windows Adapter” and click Uninstall.
c.
In the warning message titled “Confirm Device Uninstall”, select the checkbox against
“Delete the driver software for this device”.
d. Once the “TAP-Windows Adapter” is successfully uninstalled, uninstall the currently
installed version of the client software.
e. Proceed with installation of SSL VPN Client Version 1.3.1.10.
Step 1
Download SSL VPN Client installer Version 1.3.1.10 from Download Cyberoam Clients page on
Cyberoam website.
Note: There are two variants of the installer for SSL VPN Client Version 1.3.1.10.

For Windows 10 operating systems, users must download the installer file titled
CrSSL_v1.3.1.10_Windows10.zip.

For all earlier versions of the Windows operating systems, download the installer file titled
CrSSL_v1.3.1.10.zip.
Step 2
Double click on the downloaded file to install and select the language for displaying the installation
steps. Follow the onscreen instructions given by the installation wizard.
Step 3
The “Installer Language” dialog box appears. Select the preferred language. The default language
is English.
Screen – Language Selection
Step 4
Click “Browse” to change the location of the Destination Folder where the client is to be installed.
Click “Next”.
Page 10 of 18
Cyberoam SSL VPN Installation and Configuration Guide
Screen – Choose Install Location
Step 5
Select additional tasks, if required.
Screen – Select Additional Tasks
Step 6
The Client is now ready to be installed. Click “Install”.
Page 11 of 18
Cyberoam SSL VPN Installation and Configuration Guide
The following screen appears while installation is in progress.
Screen – Installation in Progress
Page 12 of 18
Cyberoam SSL VPN Installation and Configuration Guide
Step 7
A screen is displayed prompting you to install a Network Adapter device driver software from Sophos
Limited titled “TAP-Windows Provider V9 Network adapters”.
Note:

This step is not applicable for users running Windows 10 operating system as the Network
Adapter device driver software will automatically be installed.

For earlier versions of Windows, it is mandatory to install the device driver software.
However, if you have chosen to always trust software from “Sophos Limited”, this step is not
required and similar to Windows 10, the Network Adapter device driver software will
automatically be installed.
Screen – Install TAP Network Adapter
Once the installation is complete, you will find CrSSL Client icon
in the system tray.
Page 13 of 18
Cyberoam SSL VPN Installation and Configuration Guide
Configuring Cyberoam SSL VPN Client
Step 1
Right click the Client icon
in the System Tray to configure the SSL VPN server IP Address.
Screen – Server Settings
Screen – SSL VPN Server Settings
Step 2
Configure the SSL VPN Server, the Protocol and the Port. Use the ‘Restore to default (last imported)
configuration’ to import the configurations made in the previous version.
Page 14 of 18
Cyberoam SSL VPN Installation and Configuration Guide
Step 3
Previous Configuration can also be imported by selecting the “Import Configuration” option as shown
below:
Screen – Import Configuration
Import Configuration using the on screen instructions that follow.
Step 3 Login to access network resources or Internet
Double click SSL VPN Client icon
and specify username and password and click Login button.
Screen – User Authentication
Enable ‘Save username and password’ checkbox, if you don’t want to type username and password
every time you login. Enable ‘Auto Start SSLVPN’ checkbox to automatically initiate the SSL VPN
Client when the system starts. For enabling ‘Auto Start SSLVPN’ checkbox, ‘Save username and
password’ checkbox needs to be enabled.
Page 15 of 18
Cyberoam SSL VPN Installation and Configuration Guide
If the “Per User Certificate” option is enabled from VPN > SSL > Tunnel Access > Tunnel Access
Settings in Cyberoam, the user will be prompted to specify the configured Passphrase in the “Enter
Password” option as shown in the screen below:
Screen – Enter Password (Passphrase)
The icon turns yellow
indicating that connection is in progress.
Right click the CrSSL Client icon and click ‘Show Status’ to view the connection status.
Screen – View Connection Status
Screen – Connection Status
Page 16 of 18
Cyberoam SSL VPN Installation and Configuration Guide
The icon turns green
the moment connection is established and IP is leased.
Screen – Connection Established
Right click the green SSL VPN Client icon
and click “Logout” to disconnect the connection.
Screen – Disconnect the connection
Once disconnected, the SSLVPN Client icon turns red. Right click the red icon
the SSL VPN Client.
and click Exit to
Screen – Exit the SSL VPN Client
This finishes the configuration of Cyberoam SSL VPN client on the remote user’s machine.
Page 17 of 18
Cyberoam SSL VPN Installation and Configuration Guide
Configure Proxy (if required)
Configure proxy if Client is not able to connect to the Internet directly i.e. outbound access is
restricted via HTTP or SOCKS proxy.
Note
If you are configuring proxy, make sure, you have not selected UDP protocol in the Server Settings
(Step 2).
Screen – Configuring Proxy
Screen – Proxy Settings
This completes the Installation and Configuration for Cyberoam SSL VPN Client.
Page 18 of 18