[plug] Firewall question

[Gavan Blunt]

I'm a longtime Smoothwall user for my firewalls, but soon I'm going to
need to add a 2nd red interface to one of the firewalls, which doesn't
appear possible with smoothwall.  Does anyone know of a linux distro,
something like smoothwall, that would allow adding a 2nd red interface? 
(ie, a 2nd network connection, not just multiple IP addresses on a
single red interface).

Cheers,
Gavan Blunt.