On 10/4/05, Wesley K. Joyce <wjoyce at uvi dot edu> wrote:
> Greetings list, we have a m0n0wall PC with 2 NICs that serves as a lab
> router.  There is one rule on each interface that allows any protocol
> from any source to any destination.  Today, about an hour ago, the
> router stopped allowing any access to our Squid Proxy (TCP port 8080)
> that is outside of the m0n0wall.  There are dozens of PC behind the LAN
> interface of the m0n0wall, but only entries for one PC showing a red X
> for access to the Squid Proxy server on port 8080.  We rebooted
> monowall, even added an explicit rule to the squid proxy server IP and
> port and that didn't help.  There was no evidence of what was causing
> the problem.  The odd thing is that you could telnet from the same
> computers behind the LAN interface to the IP and Port # of the Squid
> Proxy Server and Squid Proxy port.  Unfortunatlely, we have to remove
> m0n0wall from service and put back the original router m0n0wall
> replaced.
>

And this was working fine, and just out of nowhere stopped working? 
Something changed somewhere.  Do you have NAT disabled?  Also, which
rule is actually dropping the traffic? 
http://doc.m0n0.ch/handbook/troubleshooting-firewall-rules.html

The config.xml off status.php would be helpful too (or the entire page
too for that matter).

-Chris