network-zone-ip-tunnel - Manage IP Tunnels
network zone new ZONE ip-tunnel ... network zone ZONE edit ...
The ip-tunnel hook is used to create IP tunnels that use protocols like GRE to encapsulate IP packets.
The following options are understood:
Sets the protocol that is being used to encapsulate IP packets. Currently only GRE is supported.
The address of the peer that terminates the remote end of this tunnel.
If left empty, connections from any IP address will be accepted.
The local IP address the tunnel originates from.
This is optional and if unset a useful default will be used.