[TriLUG] iptables and opening a port

[Christopher L Merrill]

<background>
We have a server that is behind a firewall and is (was) our CVS server.
The machine is an older RedHat machine recently upgraded to 9.0.
During a recent maintenance task we installed all of the latest
RH security patches.  We can no longer access the CVS server on that
machine...the port (2401) is now blocked.
<background>

So the question is: How do we open the port?

On my home server, which has a fresh RH9 installation, the 'lokkit' program
allowed me to easily open a port...it appears to edit the /etc/sysconfig/iptables
config file. I tried that on this server and it appeared to edit the
iptables config file (AFAICT), but now other ports are blocked as well
(80)...so this apparently did not work.

We also tried disabling iptables completely (using chkconfig) and even
after rebooting, the ports are still blocked.  Ironically, since this
machine is firewalled in our LAN, we don't really need any ports blocked.

TIA,
Chris

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