Sophos Virtual Email Appliance Setup Guide

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Virtual Email Appliance Setup Guide

2 | Sophos | Installing a Virtual Appliance

Installing a Virtual Appliance

As an alternative to the hardware-based version of the Sophos Email Appliance, you can deploy appliances as virtual machines using VMware.

Note: If you are not deploying a virtual appliance, refer to the version of the setup guide that was shipped with the hardware-based model of your Email Appliance.

These appliances can be clustered with other virtual appliances or with hardware-based Sophos Email Appliances.

Setting up a virtual appliance involves these basic steps:

1. Enabling Port Access

2. Downloading Virtual Appliance Files

3. Determining Disk Space, Memory and CPUs

4. Adding the Virtual Appliance to a virtualization infrastructure

5. Starting the Virtual Appliance

6. Configuring Network Settings

Once installation is complete, you can then proceed through the setup wizard as you would with a hardware-based appliance.

See the Sophos Email Appliance

Configuration Guide

for more information.

Follow the steps in “Adding a Virtual Appliance” and “Configuring Network Settings” to complete the installation and initial configuration of a virtual appliance. You will then be ready to finish the configuration using the appliance's setup wizard.

Configuration Checklist

Before beginning installation and configuration, read the checklist below. Then make sure you meet the prerequisites and that your network allows the necessary port access. You will need the following:

• Activation code (received in an email from Sophos)

• IP address of default gateway (not required if using DHCP)

• IP addresses of DNS servers (not required if using DHCP)

• Hostnames and DNS types for internal mail delivery servers

• Domains for which the virtual appliance accepts mail

• IP addresses or hostnames of mail relays allowed to relay outbound mail through the appliance

• [Optional] Active Directory or LDAP server information (server, port, etc)

Prerequisites

To install and run a virtual appliance, you must have the following:

• VMware ESX or ESXi 3.5, VMware ESX or ESXi 4.0, VMware Workstation 6.5, or VMware Workstation 7.1.

• A minimum of 20 GB free disk space. You may need to allocate more space, depending on the number of messages your system processes.

• RAM for the virtual appliance should be set to 1, 2 , 3, or 4 GB. See the table in “Determining Disk Space and Memory

Requirements” for this and other recommendations.

Sophos | Installing a Virtual Appliance | 3

Enabling Port Access

To ensure the functionality of your virtual Email Appliance, configure your network to allow access on the ports listed below. Some ports are required only for specific situations, such as when you enable directory services, or when the appliance is part of a cluster.

External Connections

These services are typically used for connections between your Email Appliance(s) and locations outside of your organization's network.

Port

Function

Remote assistance

Service

SSH

Protocol

TCP

123

443

444

10443/443

Mail transfer

Software downloads

Network time synchronization

Registration

Feedback

SPX Secure Email Portal

SMTP

HTTP

NTP*

HTTPS

HTTP

HTTPS

TCP

UDP

TCP

Connection

[Required] Outbound from appliance to esa-ssh.sophos.com

[Required] Inbound/outbound between appliance and intranet/internet

[Required] Outbound from appliance to internet

[Required] Outbound from appliance to NTP server (e.g. pool.ntp.org

)

[Required] Outbound from appliance to esa-reg.sophos.com

Outbound from appliance to sophos.com

Inbound from internet to appliance

(selectable)

*NTP controls network time synchronization on the virtual Email Appliance, replacing "Host-Guest TimeSync," a VMware tool that can also this purpose. To configure an NTP server, use the Time Zone page in the Setup Wizard. See the

Sophos

Email Appliance Configuration Guide

for more information.

Internal Connections

These services are typically used for connections within your organization's network and your Email Appliance(s), or between appliances themselves, if you have multiple Email Appliances.

Port

20, 21

161

162

Function

FTP backup

Clustering

Mail transfer

DNS services

SNMP monitoring

SNMP traps

389, 3268,

(636, 3269)

Directory services synchronization

Service

FTP

SSH

SMTP

DNS

SNMP

LDAP(S)

Protocol

TCP

TCP/UDP

TCP

UDP

TCP/UDP

TCP

Connection

Outbound from appliance to FTP server

Inbound/outbound between clustered appliances

[Required] Inbound/outbound between appliance and intranet

Outbound from appliance to DNS server

Inbound from SNMP monitoring server(s) to appliance

Outbound from appliance to SNMP monitoring server(s)

Outbound from appliance to directory server

4 | Sophos | Installing a Virtual Appliance

Port

443/10443

(redirect from 80)

5432

18080

Function

End User Web Quarantine

Service

HTTPS

Database functions Encrypted

SQL

Administration UI and clustered UI functions HTTPS

Protocol

TCP

TCP/UDP

TCP

Connection

Inbound from intranet to appliance

(selectable)

Inbound/outbound between clustered appliances

[Required] Inbound/outbound between appliance and intranet

Downloading Virtual Appliance Files

Before you can install and configure a virtual appliance, you must obtain the necessary files from the Sophos website. There are two ways of obtaining the installation files:

• Install directly from the internet using a URL.

• Download the necessary files, and install them manually.

1. Locate the email message sent by your Sophos representative that contains your product activation code. This message will also contain a link to the downloads section of the Sophos website. Click the link.

2. In the section of the table that matches your supported VMware platform, you will see two installation methods: “Install via the internet ” and “Download files and install manually”.

3. If you choose to “Install via the internet”, leave your web browser open to this page on the Sophos website, or copy and paste the URL to a convenient location, and proceed to the “Adding a Virtual Appliance” section of this setup guide.

Or, if you choose “Download and install manually”, click each of the four links to retrieve an

.ovf

file, two

.vmdk

files, and an

.mf

file. Then proceed to “Adding a Virtual Appliance.”

Important: For the manual method, all files must be downloaded to the same directory for installation. File extensions must be preserved.

If your VMware platform is (ESX or ESXi) 3.5 or VMware Workstation 6.5 or 7.1, you will download a version 0.9

.ovf

file; if your platform is VMware (ESX or ESXi) 4.x, you will download a version 1.0

.ovf

file.

The

.mf

file contains SHA1 checksums used to verify the download contents.

Note: If you are an existing customer with a MySophos account, you can log in, and retrieve the files from the Downloads

and updates section.

Determining Disk Space and Memory Requirements

The following table contains guidelines for recommended CPU, memory, and disk space allocations on your virtual appliance.

The amount of disk space required varies between environments and is highly dependent upon spam and other quarantine policies, as well as the amount of traffic you expect your virtual appliance to process.

By default, a virtual appliance uses 21 GB of disk space. If necessary, you can increase the amount of virtual disk space following installation; however, once set, the disk space size cannot be decreased. It can only be increased. When you view the properties of your virtual appliance in VMware, the larger of the two disks represents the virtual disk size of the appliance.

A virtual appliance also uses 1GB of memory and 1 CPU by default. These two settings can be adjusted after installation, but it is recommended that you consider them beforehand, and make any required changes.

Sophos | Installing a Virtual Appliance | 5

If you are running ESX 4.x or ESXi 4.x, you can use the wizard to select a virtual appliance profile that corresponds with the table below. Otherwise, you can change the settings through VMware once you have imported the virtual appliance.

Note: Although the wizard allows you to select the CPU and RAM, the disk space must be adjusted directly in VMware.

See the “Adding a Virtual Appliance” section and the VMware documentation for instructions.

Maximum Users

(Approximate)

Single user/testing

Up to 300 users

Up to 1000 users

Up to 5,000 users

Up to 10,000 users

Maximum Mail Traffic

Recommended Virtual

Email Appliance

Profile

Recommended CPU(s) Recommended

Minimum

Memory

(RAM)

Recommended

Minimum

Disk Space

Up to 50 messages/hour

Up to 60,000 messages/hour

Up to 200,000 messages/hour

Up to 400,000 messages/hour

Up to 600,000 messages/hour

Single user (demo)

Small

Small-medium

Medium

Large

512 MB

1 GB

2 GB

3 GB

4 GB

21 GB

30 GB

40 GB

50 GB

* Maximum mail traffic numbers are based on the assumption that 85% of incoming messages are blocked at the connection level by Sophos Sender Genotype reputation filtering. If your virtual appliance is only processing outbound messages, or you are not performing any type of reputation filtering on inbound messages, you should instead assume that your mail traffic will be approximately 15-20% of the numbers shown in the table.

Optionally, you can customize any of the available profiles. For more information, see the VMware documentation.

Adding a Virtual Appliance

You can use the import wizard in your supported version of VMware to add a virtual Email Appliance to your VMware-based infrastructure. The steps vary slightly, according to your version of VMware. Use the procedure that matches that version.

These steps assume you have already completed the task described in the “Downloading Virtual Appliance Files” section.

Importing a Virtual Appliance with ESX/ESXi 3.5 or 4.x

Perform the following steps to add a virtual Email Appliance to your VMware-based infrastructure using the wizard included with VMware ESX/ESXi 3.5 or 4.x.

For specific instructions on using

ESXi 3.5

, see the Sophos Knowledgebase.

For specific instructions on using

ESXi 4.0

, see the Sophos Knowledgebase.

1. Log in to the VMware vSphere 4.x or VMware vCenter Server on which you will install the virtual appliance.

2. In VMware, launch the import wizard (the menu commands vary depending on your version of VMware).

3. Depending on the installation method you selected in the “Downloading Virtual Appliance Files” procedure, either browse to the directory where you downloaded the

.ovf

and

.vmdk

files, or select the “URL” option, and enter the online location of the

.ovf

file. Click Next.

Details of the virtual appliance you are about to import are displayed. Click Next.

4. In the Name text box, enter the name of the virtual appliance that will be displayed in the Inventory Tree. Click Next.

5. [Optional] If you are prompted to select a resource pool in which to run the virtual machine, select a pool, and click

Next.

6 | Sophos | Installing a Virtual Appliance

6. [Version 4.x only] On the Deployment Configuration page, select a user profile for the virtual appliance. Refer to

“Determining Disk Space and Memory Requirements” section for recommendations about which profile best suits your organization.

7. To accept the settings, click Finish.

A message box is displayed, indicating the progress of the import.

8. When the import is complete, click Close.

The virtual appliance is displayed in the Inventory Tree.

Important: Do not power on the virtual appliance yet.

9. Edit the VMware power controls so that your virtual machine's “power off” option is configured to Shut Down Guest, and the “reset” option is configured to Restart Guest.

Note: In addition to the “Shut Down” and “Restart” options, other VMware tools are bundled with the virtual Email

Appliance. For more information, see the

Sophos Knowledgebase

10. View the properties for your new virtual appliance to confirm that the disk space, memory, and CPU settings are as desired. Or, if you are using a supported VMware version other than 4.x, manually adjust these settings as necessary.

For guidelines, see “Determining Disk Space and Memory Requirements.”

Note: If applicable, when prompted, ensure that sufficient space is allocated for hard disk growth.

Importing a Virtual Appliance with Workstation 6.5/7.1

Perform the following steps to add a virtual Email Appliance to your VMware Workstation using the wizard included with

VMware Workstation 6.5 or 7.1.

Note: VMware Workstation is supported for testing and is not intended for a live production environment. For full deployment, use either ESX/ESXi 3.5 or ESX/ESXi 4.x.

1. In VMware Workstation, select File ➤ Import or Export .

The Conversion Wizard launches. Click Next.

2. A list of conversion sources that includes A virtual appliance (industry-standard OVF) is displayed. Click Next.

3. On the Source Type page, from the drop-down list, select Virtual Appliance. Click Next.

The Location page is displayed.

4. Depending on the installation method you selected in the “Downloading Virtual Appliance Files” procedure, either browse to the directory where you downloaded the

.ovf

and

.vmdk

files, or select the “URL” option, and enter the online location of the

.ovf

file. Click Next.

Details of the virtual appliance you are about to import are displayed. Click Next.

5. Now you are ready to choose a destination for the new virtual machine. Click Next.

6. On the Destination Type page, from the drop-down list, select Other Virtual Machine. Click Next.

7. On the Name and Location page, enter a name for the virtual appliance, and browse to the desired location for the installation. Click Next.

8. [Optional] If prompted to set VM Options, select from the settings available. Click Next.

9. The Networks page shows the network mapping. Click Next.

The Customization page is displayed, but the options are grayed out. Click Next. The installation begins, with the progress displayed in the wizard.

Important: Do not power on the virtual appliance yet.

10. Edit the VMware power controls so that your virtual machine's “power off” option is configured to Shut Down Guest, and the “reset” option is configured to Restart Guest.

Sophos | Installing a Virtual Appliance | 7

Note: In addition to the “Shut Down” and “Restart” options, other VMware tools are bundled with the virtual Email

Appliance. For more information, see the

Sophos Knowledgebase

11. View the properties for your new virtual appliance to confirm that the disk space, memory, and CPU settings are as desired. Or, if you are using a supported VMware version other than 4.x, manually adjust these settings as necessary.

For guidelines, see “Determining Disk Space and Memory Requirements.”

Note: If applicable, when prompted, ensure that sufficient space is allocated for hard disk growth.

Starting a Virtual Appliance

With installation complete, you are ready to start the appliance. When you power on the appliance for the first time, it will initialize and then reboot to apply the settings that you configured using VMware. You will power on the appliance using your VMware client software.

1. In the VMware Inventory Tree, select the virtual appliance.

2. Power on the appliance, and view the VMware console.

A message is displayed in the VMware console, advising that the appliance is initializing. When initialization is successful, a second message is displayed, informing you that the appliance is rebooting. There will be a slight delay while the system completes these tasks.

Note: If you have difficulty viewing the text in the Sophos splash screen, launch a separate virtual machine console.

After initialization and rebooting are complete, a command-line interface is displayed in the console. You can now configure network settings using the wizard provided in the console. See the “Configuring Network Settings” section for more information.

Configuring Network Settings

Perform the following steps to configure network settings for a virtual appliance. This procedure assumes that you have powered on your appliance as described in the “Starting the Virtual Appliance” section.

1. In the Inventory Tree, select the virtual appliance, and click the Console tab.

Note: If you plan to create additional virtual appliances in the future, take a moment now to clone this virtual appliance before proceeding with configuration.

2. Type a fully qualified domain name, and press Enter .

3. When prompted to use DHCP, type “no”, and press Enter . Alternatively, type “yes”, and press Enter ; when prompted to use DHCP for subsequent settings, press Enter . If you choose "yes" for DHCP, skip ahead to step 10.

4. Type an IP address, and press Enter .

5. Type the netmask, and press Enter .

6. Type the IP address of the default gateway, and press Enter .

7. Type the IP address of the primary DNS server, and press Enter .

8. Type the IP address of the secondary DNS server, and press Enter .

9. If applicable, type the IP address of the tertiary DNS server, and press Enter , or if you are not assiging a tertiary servery, just press Enter to complete the network configuration.

10. When prompted to apply the settings, press Enter .

8 | Sophos | Installing a Virtual Appliance

11. In a web browser, enter the URL for your virtual appliance that is displayed in the console (https://<IPaddress>:18080).

Refer to the "Initial Configuration" section of the

Configuration Guide

for further instructions. Ignore the initial steps

(they only apply to hardware-based appliances), and begin at step 3.

Sophos | Cloning Considerations | 9

Cloning Considerations

VMware allows you to clone a virtual machine. Cloning can be an efficient way to create additional message capacity or add redundancy. Be aware, however, that cloning can have unwanted consequences, and it is not recommended that you clone virtual machines unless you are an experienced VMware administrator.

Sophos only supports cloning virtual Email Appliances for the following reasons:

• Cloning an appliance prior to joining a cluster, so that you have an unused appliance already configured, should you need to add capacity on short notice.

• Removing an appliance from a cluster, cloning it, and re-adding it to the cluster.

For more about cloning, see the VMware website.

Re-Registering a Virtual Appliance

If you clone a virtual appliance, each cloned instance must be re-registered before you can use it in live production mode.

Re-registration is necessary to take advantage of reporting and clustering features. If you do not re-register a cloned appliance, it cannot be distinguished from the parent appliance (the virtual machine it was cloned from) if both are used on the same network; properties such as the hostname and static IP address are identical to that of the parent virtual machine.

You can re-register a virtual appliance in the command-line interface of the virtual appliance by following the steps below.

You can also use the Re-register button on the Network Interface page of the appliance's administrative interface. See

“Configuring Interface Settings” in the product documentation for more information.

Important:

• If the appliance you plan to clone belongs to an existing cluster of appliances, you must remove it from the cluster before cloning. Once re-registration is completed according to the steps that follow, you can join one or both of the appliances to the cluster.

• Before re-registering, ensure that you have configured unique network and hostname settings for the cloned virtual appliance. See the Virtual Appliance Setup Guide for more information.

•

If you have configured certificates for the appliance on the Configuration ➤ System ➤ Certificates page, you must upload new certificates that bear the hostname of the cloned appliance. This is not necessary if you are using the default self-signed certificate.

To re-register a virtual appliance:

1. Power off the virtual appliance that you want to clone.

2. Clone the virtual appliance (See the VMware documentation for specific instructions).

Note: If you are creating a clone as backup and have no immediate plans to use it as a live production appliance, you do not need to re-register until you are ready to use it.

3. Power on the newly cloned appliance.

4. In the VMware Inventory Tree, select the cloned virtual appliance, and click the Console tab.

5. In the console, type “1” to select Configure Network Settings from the Network Configuration menu. Follow the steps in the “Configuring Network Settings” section to assign unique network identifiers to the cloned appliance.

6. In the console, type “3” to select Re-register from the Network Configuration menu.

10 | Sophos | Cloning Considerations

7. You are prompted to erase duplicate data that has been copied to the cloned virtual appliance from the original image.

Doing so removes duplicate logs, reports, and message store data. If you want to retain the data, press Enter . Or, if you want to erase duplicate data, type yes

, and press Enter .

8. You are prompted to re-register the virtual appliance. To re-register, type yes

, and press Enter . If you do not want to re-register, type no

, and press Enter .

The cloned appliance is re-registered and given a unique identity within your network. The new network settings are displayed in the console, and on the Configuration ➤ Network ➤ Network Interface page of the administrative interface.

9. You are instructed to open a browser to the displayed IP address to complete configuration of the cloned virtual appliance.

10. Power on the virtual appliance that was used to create the clone.

11. [Optional] Create a cluster using these virtual appliances, or add both to an existing cluster. For more information, see

“Clustering” in the product documentation.

Sophos | Troubleshooting VMware Performance | 11

Troubleshooting VMware Performance

If you suspect that your virtual appliance is not performing up to expectations, you can test the performance by selecting 3.

Run system diagnostic benchmarks from the Network Configuration menu. This tool tests the input/output, CPU, and system memory. For more information, see the

Sophos Knowledgebase

12 | Sophos | Copyrights and Trademarks

Copyrights and Trademarks

Sophos is a registered trademark of Sophos Limited and Sophos Group. All other product and company names mentioned are trademarks or registered trademarks of their respective owners.

No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise unless you are either a valid licensee where the documentation can be reproduced in accordance with the license terms or you otherwise have the prior permission in writing of the copyright owner.

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