Ok hoping someone can help me, I have little hair left after this one...
I have a home network set up with a Redhat 8 box and 3 client PCs. The
redhat box has eth0 connected to the cable modem for Internet and eth1 as
the LAN which goes to a hub.
I have IP tables setup for NAT with Masquerading and forwards are accepted
from eth1. Inputs are also always accepted from eth1. Output policy is
ACCEPT, except for netbios stuff on eth0 which is dropped.
The problem is that client machines can use the internet no problem through
the server, but the server can not use the internet itself?!? Pages and
things keep timing out etc. Cannot ping using name or IP. My mailserver
(external) on the box can receive mail but cannot send at all (DNS
failiure). My ISP doesn't block any of this stuff, I know that for a fact.