Skip to content
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.

Page permalink

Always use the following permalink when referencing this page. It will remain unchanged in future help versions.

https://docs.sophos.com/nsg/sophos-firewall/21.0/Help/en-us/webhelp/onlinehelp/index.html?contextId=network-IP-tunnels

IP tunnels

An IP tunnel is a mechanism that encapsulates one network protocol as a payload for another network protocol. Using a tunnel, you can encapsulate an IPv6 packet into an IPv4 packet for communication between IPv6-enabled hosts or networks over an IPv4 network, or vice versa.