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The XG Series hardware appliances will reach end-of-life (EOL) on March 31, 2025. Click here to see the XG to XGS migration documentation.

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https://docs.sophos.com/nsg/sophos-firewall/20.0/Help/en-us/webhelp/onlinehelp/index.html?contextId=HA-services-supported

Supported services

Sophos Firewall supports HA for most services. The following lists show the specific details.

Models and interfaces

Features Active-passive Active-active
Wi-Fi models
Cellular WAN

To use HA, turn off cellular WAN in Network > Cellular WAN.

To use HA, turn off cellular WAN in Network > Cellular WAN.

DHCP

DHCP prefix delegation
PPPoE

Restriction

HA isn't available on Wi-Fi models, including XGS, XG, and SG Series appliances.

Applications and acceleration

Features Active-passive Active-active
Synchronized Application Control (SAC)

Firewall acceleration

(FastPath offloading)

Only on the initial primary device

For FastPath offloading, see Architecture for offloading.

Email

Features Active-passive and Active-active
Quarantine storage Individually on each device for the emails it processes
Quarantine digest email Each device sends the email for its quarantine
Quarantine release by administrators From each device for the emails it processes
Quarantine release by users

From the user portal.

The user portal only shows emails quarantined on the current primary device.