(I asked this on the enigma-list, but didn't get enough information, so
excuse the duplication)
I know this is a common question, but the two usual answers (routed
and/or gated) confuse me, so I'm going to ask anyway. This is way beyond
my level of network knowledge...
Hypothetically, I'd like to setup a single linux box with three
interfaces - one to a local, non-routeable rfc1918 network(?) on eth2,
and two connected to the outside world thru two different ISPs. The
connections would be one fast'n'flaky(eth0) and one
slow-but-stable(eth1). Both eth1 and eth0 would have routable,
pseudo-static IPs. eth1 may possibly have multiple IPs. I'd then like to
run some servers on the same box.
I'd like to be able to set it up such that all inbound connections that
go to eth1, get replied to on eth1. This is the only 'requirement' -
everything else I'm flexible on. I half-believe that this is the default
behavior anyway, but I'd like to make sure.
I'd then like to be able to set up a subset of services that would use
eth1 for outgoing connections. Everything else (including NAT) I'd like
to do thru eth0, unless eth0 is down, then I'd like to use eth1. I don't
really want to deal with routing protocols unless I have to, and I
suspect I don't.
I'm sure this can be done, but I'm digging for some basic information to
get me started. Has anyone done this kind of set-up ? Can you provide a
starting place ? I've read the netfilter and advanced routing howto, but
I'm still a little confused.
Thanks in advance,
John A.
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