[Astlinux-users] Port Forwarding FTP

[<da...@ry...>]

All,
 
I just helped a friend reconfigure an AstLinux installation.  Until today, it had been behind a NAT'd router/firewall.  This afternoon, we added a NIC card and promoted AstLinux to replace the router/firewall.  
 
All the complicated bits worked fine. However, testing revealed that a simple port forwarding to an internal FTP server (port 21) isn't working.  The FTP server is working from within the LAN but we can't access it from the Internet.  We enabled EXT=>LAN using the web interface and we can see the rule in iptables but it doesn't seem to work.  
 
I'd appreciate any troubleshooting suggestions.  
 
Thanks,
 
Dan