[NMLUG] Port Forwarding with ActionTec DSL modem

[john at reinhold.com (John Reinhold)]

There is a thread:

http://list.nmlug.org/nmlug/2003-November/threads.html#00016
(titled "SSH")

  with some discussion about problems an individual was having with 
PortForwarding port 22 through to a linux box for remote SSH access - 
using an ActionTec DSL Modem/router.

I think it was also on Qwest DSL.

Well I have the EXACT same problem.

I have a RedHat Fedora Core1 server that I have SSH access to.  It 
works internally, but external access is a nogo.

If I try and acces it from an OSX box using openssh, I get "connection 
refused" and if I try and access it from a PC running PuTTY on Windows, 
I get "connection timed out".

I have tried all the suggestions in the thread - like running 
tcpdump... The Actiontec is dropping everything - nothing gets through.

My firewall settings are "Basic" (which means NAT only).  NAT is turned 
on, and DHCP is on.  My RedHat box has a static IP, and I have tried 
port forwarding, DMZ, and both...

I have had my modem replaced once, and I have tried firmware versions 
.71 and .69.

I get the same results regardless of if I run sshd on port 22 or 2222 
or any port (and forward them).

The ActionTec simply appears to be dropping the forwards...

Any ideas?

-John Reinhold