ip route add default via a.b.c.d
where a.b.c.d is the IP address you gave to the tunnel interface at the main network end.
David A. Bandel wrote:
Ladies and Gentlemen (and others ;-) ),
back through the main network. Reason: some connections realize that traffic coming from my relocate network is coming via an invalid route and is filtered.
this is also called RPF or reverse path filtering, and is sometimes used as a partial countermeasure against spoofed ddos attacks
Regards, Guy