[Myatu]

You use an "iptables" rule, that modifies the IP source to that of your failover IP. There are several topics about it if you search for it, one of which is http://forum.ovh.co.uk/showthread.php?t=2311.

[Trojan]

I just ordered a UK ip-failover. How do i configure my server (ubuntu server 11.04) to route all my traffic (in and out) to go over that uk ip instead of the standard fr ip?