[wellylug] multiple gateways

[Mark Signal]

Hi

hopefully a simple question

I want a debian box to be able to respond to traffic that comes  2 
different gateways.

I tried adding a second gateway setting for eth0 in the  
/etc/network/interfaces file but as I expected it spat the dummy

presumably I need a primary gateway (as defined in 
/etc/network/interfaces?) and an alternative gateway set up in routing 
somehow?

as usual - any pointers/abuse gratefully accepted

thanks

Mark Signal