I have 2 (potentially N) upstream links, and one single netfilter box
that handles all the routing from/to them. All routers are connected
on the same network segment. This implies that all packets leave the
netfilter box via the same interface (eth1).
The main routing table holds about 139100 entries at the moment, with
about 71500 routes via one router (let it be router A) and 67600 routes
via the other one (router B).
Is there a way to match packets, in the filter table, based on which
router they will be routed to? I've googled a bit but wasn't able
to find a way. Intuitively, matching should be done in the
POSTROUTING chain, after the routing decision has been taken.
I need to match, say, all packets that will be routed via router A.
(A way to match incoming packets would be nice, too. But I think
I can match by --mac-source for that).
TIA,
.TM.
--
____/ ____/ /
/ / / Marco Colombo
___/ ___ / / Technical Manager
/ / / ESI s.r.l.
_____/ _____/ _/ Colombo@xxxxxx
