I have an odd problem with connecting to FTP servers. All connections times out. Firewall is no problem, because I can't connect even if FW is turned off. Here is my network diagram

| INTERNET |-------------| Gateway server - Win2K3 |-----------| Switch |-------| Workstation |

Any ideas are welcome

Edited November 10, 200520 yr by klasika

Are you using passive or active (port) transfer mode?

Your ISP could also be blocking port 21 traffic. It could also be the FTP client you are using. Any more details?

My line is open all the way through from my ISP to my router, so that side is OK. I'm affraid that there is something going on on my gateway server. Anyone knows any test for FTP protocol, just to see what happens ...

Try typing telnet COMPUTERNAME 21 at the command prompt, you should get a response from the FTP server

For example mine says: 220 Serv-U FTP Server v6.1 for WinSock ready...

Try typing telnet COMPUTERNAME 21 at the command prompt, you should get a response from the FTP server

For example mine says: 220 Serv-U FTP Server v6.1 for WinSock ready...

well for some reason I don't get the response from server ...

Hi, either your gateway or your ISP is blocking port 21 then.

More than likely, it's the ISP providing the internet line to your Gateway server site hosting the FTP site that is blocking port 21. Consider changing the FTP port that the FTP server is using and see if your FTP transfer works on that different port - it should.

I have no ftp servers on my LAN, and my ISP says that all my ports are open, so I'm targeting my gateway server as potentional problem ...