It would be interesting to put a picket sniffer (ethereal, etc.) in the middle and see whats actually going on. I do know for a fact that RR did do some magic to prevent FTP servers from working over their cable modems in the past. I had this problem about 5 years ago before switching over to the RR business cable modem. I was actually using a GUI ftp client on windows when I detected this. This particular FTP client showed you the connection stream (which in essence served as a sniffer).
Normally the FTP protocol will either issue a 'PORT' or a 'PASV' command to setup the data port (after logging in successfully). But what I saw was this command was coming across the wire incorrectly... I forget exactly what it looked like, but they had changed one letter of these commands which was causing FTP to not be able to setup its data connection. I moved my ftp server to a different port (something like 10021... it was for my own use anyways and not public so I didn't care at the time) and it worked fine.
I don't know if they are still doing this or not, but that was my experience about 5 years ago,
Mark Freeze wrote:
Whe I got home yesterday I turned on the 'Allow Passive Transfers' option in the config file, but, I'm still having the same problem. I am not using a 'client' program to connect. Im just going to a command prompt on my $M box and doing ftp from the command line. This may be a problem with my d-link firewall-router. When I enabled the virtual server ftp option on the d-link, it only opened port 21. In fact, it showed 'Private Port 21 - Public Port 21'. I another rule for 20 but no luck. I looked at the d-link help for their virtual server feature but it kept referring me to works by the noted Spanish author 'Manual'. I may have to check out his stuff this evening.
-- Keith Mitchell Email: [EMAIL PROTECTED] PGP key available upon request -- TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug TriLUG Organizational FAQ : http://trilug.org/faq/ TriLUG Member Services FAQ : http://members.trilug.org/services_faq/
