Server connection problem

[Datorn]

I know there's a million topics like this, but I haven't found one that would be similar to my problem.
I have successfully installed and set up FileZilla server for a computer that has a firewall and is connected to a router that has NAT and a firewall, but I can't get it working on a computer that's directly connected to a modem :S

I have already tried disabling the computer's firewall which should be the only block there can be and I know it's possible to connect to that computer through ports 20,21,443 and some others because I have used Remote Administrator Server on it, which has the same problems with NAT etc.

Oh and it worked when I connected to 127.0.0.1 on the computer, but no outside connection even gets to the FileZilla log.

Any suggestions on what the problem might be?
If you need more information I'll add.

[davidgpv]

Have you tried to run a telnet to port 21 from the problematic computer to the computer that host the service? does it work?

[Datorn]

I'm not sure how telnet should work, but Remote Administrator has telnet option in it so I tried it (through port 21) and it worked. Then I tried with Windows' command line telnet command, but it couldn't connect. Should there be something like a telnet service running on the receiving computer though?

EDIT: It has Windows XP Home so the Windows' own telnet service is unavailable.

[boco]

As FTP actually derives from the telnet protocol, we are abusing the telnet client to test server access

In Telnet, type 'open <ftp server> 21' and check the reply (you must force 21 or the server listening port as telnet uses 23)

[Datorn]

Is it enough if the Remote Administrator's telnet function works? I can't try it with the windows telnet since XP Home doesn't have the service for it.

[boco]

Is it enough if the Remote Administrator's telnet function works? I can't try it with the windows telnet since XP Home doesn't have the service for it.

I can telnet fine with XP home, you only need the Telnet client (telnet.exe), no service neccessary.

[Datorn]

Ok, if it's not necessary, then no, I don't think it works.
I'm not sure I understand correctly what I should try though.
Should I try to telnet from the computer that has the FileZilla server or to it?

EDIT: Oh, and I tried connecting TO the computer.
Which has Home on it.
So no telnet service.
Didn't work.

[boco]

What do you talk about the telnet service? It is not required! You essentially try to telnet to FZ Server, and FZ Server will respond. Essentially you open telnet.exe on the computer that doesn't want to talk to the server. Example:

Code: Select all

Willkommen

Das Escapezeichen ist 'CTRL++'

Microsoft Telnet> open 10.0.0.3 21
Verbindungsaufbau zu 10.0.0.3...

220-zFTPServer v4.0, build 2008-10-25 12:29 ready.
220-
220-Hello, 10.0.0.3!
220-Current date & time: 2008-11-11, 17:13
220-You are user 1 of 50 allowed.
220-Currently logged on users: 0
220-Uploaded/downloaded total: 28.05 GiB up / 57.29 GiB down
220-
220 Have fun!

Second example:

Code: Select all

Willkommen

Das Escapezeichen ist 'CTRL++'

Microsoft Telnet> open 10.0.0.3 2100
Verbindungsaufbau zu 10.0.0.3...
220-FileZilla Server version 0.9.27 beta
220-written by Tim Kosse (Tim.Kosse@gmx.de)
220 Please visit http://sourceforge.net/projects/filezilla/

Example if no server reachable:

Code: Select all

Microsoft Telnet> open 10.0.0.3 2100
Verbindungsaufbau zu 10.0.0.3...Es konnte keine Verbindung mit dem Host hergeste
llt werden, auf Port 2100: Verbinden fehlgeschlagen

Sorry, it's in German, but you'll get the point.

[Datorn]

Oh, sorry, I didn't know the FileZilla server should respond to it :S
I tried it now to the FZ server (through port 21) and it couldn't connect. The last example happened.

[boco]

Do you have a firewall installed on that PC? If yes, check the processes you blocked. I believe svchost.exe needs access.

[Datorn]

I closed the whole firewall and tried to connect and the same thing happens.

[boco]

Odd. Can you connect to other FTP servers? like ftp://releases.mozilla.org ?

[Datorn]

Yeah I can connect to other FTP servers.

[boco]

Absolutely sure there is not a second firewall anywhere? Windows Firewall likes to re-enable itself after some updates.

If not, I'm out of ideas for now...

[Datorn]

Gah, it was windows firewall. It had enabled itself. I didn't even consider it could be on. Thanks for the help!