Drew Tomlinson:
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?
Unfortunately not. While your application (multi-homing, aka "strong ES" model of RFC 1122) would appear simpler, a general solution would target at true policy-based routing.
For some simple setups, you can use ipfw fwd rules to forward on something other than destination address.
But I agree that for more complex things you need some implementation of policy routing.
Lars -- Lars Eggert <[EMAIL PROTECTED]> USC Information Sciences Institute
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