Weird forwarding problem

I have RH9 box that I'm trying to set up as a router (no NAT). I can access
Internet from inside network but nothing is able to get in - connection
times out. At first I thought iptables are to blame but even after setting
all policies to "ACCEPT" and clearing all chains the problem persists. Tried
iptraf to see what's going on - packets seem to get forwarded to inside host
but nothing comes back. It's as if hidden connection tracking is still in
place... It all works with Cisco router so the problem is with Linux box.

Any ideas/suggestions?

TIA,
Peter

On Mon, 4 Aug 2003 15:25:17 +0300, Peter <(E-Mail Removed)> wrote:
> I have RH9 box that I'm trying to set up as a router (no NAT). I can access
> Internet from inside network but nothing is able to get in - connection
> times out. At first I thought iptables are to blame but even after setting
> all policies to "ACCEPT" and clearing all chains the problem persists. Tried
> iptraf to see what's going on - packets seem to get forwarded to inside host
> but nothing comes back. It's as if hidden connection tracking is still in
> place... It all works with Cisco router so the problem is with Linux box.

As always, the output of ifconfig and 'route -n' is helpful for
troubleshooting routing problems. Since you are not using NAT, I assume
that all your IPs are public IPs. You don't by any chance have the same
network and netmask on 2 different interfaces do you (same net routed to 2
interfaces)? Your outside interface should typically just have a host
route to gw IP and default route to gw. The net route for your network
should be local (no gw) on your internal interface.

--
David Efflandt - All spam ignored http://www.de-srv.com/
http://www.autox.chicago.il.us/ http://www.berniesfloral.net/
http://cgi-help.virtualave.net/ http://hammer.prohosting.com/~cgi-wiz/