LARTC - Feb 2006 - dual wan, dual router, one machine behind, route from both to / from one machine

i apologize if this has been asked before, but things are too busy to
preclude a full search of the list.

i have both cable and dsl from the local providers here.  due to wiring
issues here, i''ve been forced to put the cable modem in one end of the
house
and the dsl modem in the other.

the cable modem is firewalled off by a cisco pix 501 (192.168.2.12).  the
dsl modem is firewalled off by a 4 year old linksys dsl / cable router (
192.168.2.1).  behind the whole mess i have several PCs and a linksys
wrt54gs running openwrt (192.168.2.3).

if i set both 192.168.2.1 and 192.168.2.12 to forward ssh to
192.168.2.3(the wrt54gs running openwrt) and install iproute2 on the
54gs, what can i
do to make sure that ssh coming in from the cable modem gets routed out the
cable modem and ssh coming in from the dsl modem gets routed out the dsl
modem? i tried setting up multiple default routes and (for some reason
unknown to me) that worked exactly once, but then i did a power-off test of
the config and it never worked since.

assume i might be connecting over both routes from one random IP on the
internet at any random time. doing that would allow me to harness the full
and combined uplink capability of both lines.

i know one solution would be to buy another wrt54gs and run openwrt on it,
but i''ve looked all over town and no one has any of the old
linux-friendly
hardware versions still. they all have the new versions that run only
vxworks.

thanks,
michael


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