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no connect to server

Posted: 2019-01-31 13:28
by 4wusie
Hi guys, I have the following problem: FileZilla runs under win 7. I manage 5 FTP accounts via FileZilla. One of them does not connect, although the settings are correct. All others connect to the respective server. Under Win xp the faulty account connects with the same settings.

Sorry, this is translated with a translator. I am German

Re: no connect to server

Posted: 2019-01-31 14:44
by botg
What is being shown in the message log of both the client and the server?

Re: no connect to server

Posted: 2019-02-01 15:32
by 4wusie
Error: Critical error: Connection to the server failed.

...nothing more.

Re: no connect to server

Posted: 2019-02-01 15:40
by 4wusie
Sorry....

Status: Resolving the IP address for www.XXXXXXXXXXXXX.de
Status: Connect to 217.160.231.134:21...
Status: Connection established, waiting for welcome message...
Answer: 220 FTP server ready.
Command: USER pxxxxxxxxxxxx
Answer: 331 Password required for pxxxxxxxx
Command: PASS *********
Answer: 530 Login incorrect.
Error: Critical error: Connection to server failed.
Status: Connection to server disconnected
Status: Resolving the IP address for www.xxxxxxxxx.de
Status: Connect to 217.160.231.134:21...
Status: Connection established, waiting for welcome message...
Answer: 220 FTP server ready.
Command: USER pxxxxxxxx
Answer: 331 Password required for pxxxxxx
Command: PASS *********
Answer: 530 Login incorrect.
Error: Critical error: Connection to server failed.

Re: no connect to server

Posted: 2019-02-01 15:53
by 4wusie
Image

Re: no connect to server

Posted: 2019-02-01 22:01
by boco
The FTP server tells you that it doesn't accept the supplied login data. This can be due to multiple reasons (either one or more than one):

1. The username is wrong. Depending on the server used, usernames may be case sensitive. Otherwise, you could have made a typo, or copy-pasted a stray blank character into the field.
2. The password is wrong. Essentially the same issues as above, except for the fact that passwords are always case sensitive.
3. You might reach the wrong FTP server. Can happen with rogue FTP server software (like IIS) installed without the user knowing. Another reason could be a router having enabled the NAS/remote FTP maintenance feature and thus blocking the FTP port.
4. As you use plain non-encrypted FTP, anything and anyone on the way FTP traffic passes through can read and change everything transferred. Scary thought? Well, use FTP over TLS with an appropriate security level (TLS 1.2 or 1.3 and strong ciphers) whenever possible.
5. Last, but not least: Faulty hardware (e. g. RAM) or drivers (e. g. Ethernet, WiFi) can corrupt packets and prevent you from logging in.

Please check all points, in succession.

Re: no connect to server

Posted: 2019-02-02 21:58
by botg
One additional possibility: There are malicious firewalls out there that change submitted credentials, or inject forged replies.

Re: no connect to server

Posted: 2019-02-02 22:39
by boco
I think I got that covered in "4."?

Re: no connect to server

Posted: 2019-02-03 17:31
by 4wusie
Sorry, sorry, sorry Guys.....
I entered a wrong password.
In my documents I had an old password, which also had seven characters like the new one. I must have already entered the new password in Win xp and in Win 7 I used the old one again.
I am an idiot.
Thank you for your efforts

greetings