howto isolate 2 nics?

[Gene Heskett]

Greetings;

We have a machine that has two nics in it, one with an outside, world 
visible internet address, and one with an address in the 192.168.xx.xx 
range.

What we seem to be missing is a way to have requests for service generate 
the reply on the same nic it came in on, as its currently settup with just 
one gateway address, the replies are all going back out on the local 
address.

We effectively need each nic to operate in its own domain, but with the 
machine servers visible to both nics?

Can this be done?  URL's to tutorials?

Thanks in advance.

-- 
Cheers, Gene
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