Connection timed out after 20 seconds of inactivity

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fzuser_21
500 Command not understood
Posts: 3
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Connection timed out after 20 seconds of inactivity

#1 Post by fzuser_21 » 2021-12-22 02:13

Hi All,

I have FileZilla Server 0.9.60 beta.
In FileZilla server I can see that users are able to connect.
However, there is one user who can't and get this error:

Code: Select all

Status:	Connecting to WWW.XXX.YYY.ZZZ:21...
Status:	Connection established, waiting for welcome message...
Status:	Initializing TLS...
Error:	Connection timed out after 20 seconds of inactivity
Error:	Could not connect to server
Status:	Waiting to retry...
Status:	Connecting to WWW.XXX.YYY.ZZZ:21...
Status:	Connection established, waiting for welcome message...
Response:	220-FileZilla Server 0.9.60 beta
Response:	220-written by Tim Kosse (tim.kosse@filezilla-project.org)
Response:	220 Please visit https://filezilla-project.org/
Command:	AUTH TLS
Response:	234 Using authentication type TLS
Status:	Initializing TLS...
Error:	Connection timed out after 20 seconds of inactivity
Error:	Could not connect to server
It worked fine last time for the affected user a week and stopped all of a sudden.

On the FileZilla server I can see:

Code: Select all

(000238)22/12/2021 13:08:44 PM - (not logged in) (14.201.39.106)> Connected on port 21, sending welcome message...
(000238)22/12/2021 13:08:44 PM - (not logged in) (14.201.39.106)> 220-FileZilla Server 0.9.60 beta
(000238)22/12/2021 13:08:44 PM - (not logged in) (14.201.39.106)> 220-written by Tim Kosse (tim.kosse@filezilla-project.org)
(000238)22/12/2021 13:08:44 PM - (not logged in) (14.201.39.106)> 220 Please visit https://filezilla-project.org/
(000238)22/12/2021 13:08:45 PM - (not logged in) (14.201.39.106)> AUTH TLS
(000238)22/12/2021 13:08:45 PM - (not logged in) (14.201.39.106)> 234 Using authentication type TLS
(000238)22/12/2021 13:09:05 PM - (not logged in) (14.201.39.106)> disconnected.
(000239)22/12/2021 13:09:10 PM - (not logged in) (14.201.39.106)> Connected on port 21, sending welcome message...
(000239)22/12/2021 13:09:10 PM - (not logged in) (14.201.39.106)> 220-FileZilla Server 0.9.60 beta
(000239)22/12/2021 13:09:10 PM - (not logged in) (14.201.39.106)> 220-written by Tim Kosse (tim.kosse@filezilla-project.org)
(000239)22/12/2021 13:09:10 PM - (not logged in) (14.201.39.106)> 220 Please visit https://filezilla-project.org/
(000239)22/12/2021 13:09:10 PM - (not logged in) (14.201.39.106)> AUTH TLS
(000239)22/12/2021 13:09:10 PM - (not logged in) (14.201.39.106)> 234 Using authentication type TLS
(000239)22/12/2021 13:09:30 PM - (not logged in) (14.201.39.106)> disconnected.
Could you please advise hat it could be related to.

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botg
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Posts: 35508
Joined: 2004-02-23 20:49
First name: Tim
Last name: Kosse

Re: Connection timed out after 20 seconds of inactivity

#2 Post by botg » 2021-12-22 08:57

Most likely a firewall is interrupting the connection. If it only affects one user, it stands to reason that this firewall probably sits close to the client.

fzuser_21
500 Command not understood
Posts: 3
Joined: 2021-12-21 05:27
First name: FZ
Last name: User

Re: Connection timed out after 20 seconds of inactivity

#3 Post by fzuser_21 » 2021-12-22 21:27

Firewall is off.
I can't even connect from FTP app on mobile phone.
I forgot to mention that I can connect over port 990.
21 port doesn't allow to connect though.

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boco
Contributor
Posts: 26913
Joined: 2006-05-01 03:28
Location: Germany

Re: Connection timed out after 20 seconds of inactivity

#4 Post by boco » 2021-12-22 22:45

Mobile providers hate FTP. Most block port 21 and/or FTP traffic (and even FTP over TLS Explicit sessions start out as unencrypted ones and can be identified as being FTP). Port 990 is often forgotten, it seems.
No support requests over PM! You will NOT get any reply!!!
FTP connection problems? Please read Network Configuration.
FileZilla connection test: https://filezilla-project.org/conntest.php
FileZilla Pro support: https://customerforum.fileZilla-project.org

fzuser_21
500 Command not understood
Posts: 3
Joined: 2021-12-21 05:27
First name: FZ
Last name: User

Re: Connection timed out after 20 seconds of inactivity

#5 Post by fzuser_21 » 2022-01-11 04:03

Issue was resolved.
It was related to restriction on local firewall.

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