Routing With Two ISPs?

["." at babolo.ru]

> [ Charset windows-1252 unsupported, converting... ]
> > I have a 4.8 box serving as a gateway with two connections to the
> > Internet.  Is there some way to set the box up so that packets are
> > routed out through the same interface from which they arrived?  For
> > example, if a connection is initiated on port 80 from a packet arriving
> > on one interface, is there a way to make the outgoing packets from my
> > web server use that same interface as a gateway instead of the default
> > interface?
> > 
> > Any suggestions appreciated.
> It's easy IMHO
> 
> Each external iface with it's own natd,
> each forwards 80 port incoming to two
> http servers with different IP or port.
> 
> outgoing traffic can be forwarded to appropriate
> natd via ipfw rules depending on src IP or port

both servers share the same content.

Sorry, my English is bad