Can't open FTP ports in Airport Extreme router
Hi,
I have three computers networked at home with an Airport Extreme serving as a router to the internet. A couple days ago I set up an FTP server on one computer (Ubuntu Linux). It is running properly and I CAN get into the FTP server via the local area IP address (10.0.1.101). However, no matter what I do I can't get the Airport Extreme to forward any FTP connections from outside. I have port forwarding set up correctly and working correctly for echo (7), daytime (13) ssh (22) http (80) nfs (2049) and vnc (5900). However, even though I set ports 20,21 to be forwarded to the correct computer nmap they are NOT open. (nmap doesn't see them, and telnet to ports 20 or 21 is refused. However nmap on the server locally (ie as localhost) shows that these ports ARE open on the server, and ftpd IS running.) Neither of my mac laptops has ftp file sharing turned on in the preferences (not like this should matter anyway). The Airport Extreme just plain does not open or forward anything to ports 20-21.
I also tried putting the FTP server on a different port (2121), but this doesn't work either. Is this just Apple playing nanny and not allowing me to run FTP for my own good? I have been troubleshooting this for two days and no closer to a solution. I hope someone can offer some advice.
Craig
I have three computers networked at home with an Airport Extreme serving as a router to the internet. A couple days ago I set up an FTP server on one computer (Ubuntu Linux). It is running properly and I CAN get into the FTP server via the local area IP address (10.0.1.101). However, no matter what I do I can't get the Airport Extreme to forward any FTP connections from outside. I have port forwarding set up correctly and working correctly for echo (7), daytime (13) ssh (22) http (80) nfs (2049) and vnc (5900). However, even though I set ports 20,21 to be forwarded to the correct computer nmap they are NOT open. (nmap doesn't see them, and telnet to ports 20 or 21 is refused. However nmap on the server locally (ie as localhost) shows that these ports ARE open on the server, and ftpd IS running.) Neither of my mac laptops has ftp file sharing turned on in the preferences (not like this should matter anyway). The Airport Extreme just plain does not open or forward anything to ports 20-21.
I also tried putting the FTP server on a different port (2121), but this doesn't work either. Is this just Apple playing nanny and not allowing me to run FTP for my own good? I have been troubleshooting this for two days and no closer to a solution. I hope someone can offer some advice.
Craig
Powerbook 15", Mac Book 14", Mac OS X (10.5.2), Ubuntu Linux server
