On Wed, 6 Dec 100, wal wrote:

> Is there a way to tell linux to source outgoing packets with the
> address of the link that it came in from?

Yes. The iproute2 can do this in theory. You can read about it at
http://ds9a.nl/2.4Routing/HOWTO//cvs/2.4routing/output/2.4routing.html
You mark the packets as they come in and the routing routes based on those
marks.

I have a cable modem and a ISDN line. I want to put two network cards in
the one machine and have packets return on the interface they come in on.
At the moment they return via the default route.

I have not tried to get it working but my life would be a lot closer to
complete if I could. One year I will use the floppy router project to
create such a firewall/router.

Please post how you go.

Rodos

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