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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/21.0/Help/en-us/webhelp/onlinehelp/index.html?contextId=network-interfaces-RED

RED interfaces

Remote Ethernet Device (RED) interfaces provide secure tunnels between branch and head offices, enabling seamless and encrypted communication across distributed environments.

You can configure RED interfaces using dedicated RED appliances that connect to Sophos Firewall or by setting up firewalls as RED servers and clients.