Can't connect to server

Come here to discuss FileZilla and FTP in general

Moderator: Project members

Post Reply
Message
Author
timmy5000
500 Command not understood
Posts: 1
Joined: 2014-04-13 03:13

Can't connect to server

#1 Post by timmy5000 » 2014-04-13 03:26

I've been facing problems with filezilla for few days now for some reason. I have hired some systems admins for my VPS from my host provider and they seem to be able to login to filezilla but I am unable to for some reason. My webhost told me that I should contact my internet provider to see if they are blocking any ports and they even provided me some ports to start with and my internet provider said that they don't block any ports. I also don't have firewall activated neither use any anti-virus so I don't know why I can connect to my server via filezilla even though it works perfectly fine on winscp.

Here is the log:
http://pastebin.com/b0pi0kfG

Everything is colored green except for the last two lines (The error lines which is red).

When I run a test on ftptest.net, this is what I get for the log:
http://pastebin.com/HTfi5v0K

After that log is displayed, I am sent back to the original front page on ftptest.net and it shows the following for the error:


Error: Connection timed out

Timeouts are usually caused by some router and/or firewall that is interrupting the connection.
Try uninstalling all firewalls and plug your computer directly into your modem, thus bypassing the router.


But my firewall is disabled and my internet provider said that there aren't any ports being blocked.

Can someone please help me? My system admins can login but I can't :(
Top
User avatar
botg
Site Admin
Posts: 33182
Joined: 2004-02-23 20:49
First name: Tim
Last name: Kosse
Contact:
Contact botg

Re: Can't connect to server

#2 Post by botg » 2014-04-13 08:17

Failure to receive the PASV reply means that the server is behind a badly configured firewall or NAT router, where said firewall or NAT router is furthermore actively interfering with the connection.

Contact your server administrator or server hosting provider for assistance. The problem is on their end.
Top
User avatar
boco
Contributor
Posts: 25289
Joined: 2006-05-01 03:28
Location: Germany

Re: Can't connect to server

#3 Post by boco » 2014-04-15 19:27

well when can we realistically see Upload/Download speeds of > 1 MB using Filezilla?
Well, when your bandwidth is high enough, I guess. For an upload of 1 MegaByte/s you need to have a guaranteed upload rate of at least 8 Megabits/s. Overhead and congestion add to this value, so well...
### BEGIN SIGNATURE BLOCK ###
No support requests per PM! You will NOT get any reply!!!
FTP connection problems? Do yourself a favor and read Network Configuration.
FileZilla connection test: https://filezilla-project.org/conntest.php
### END SIGNATURE BLOCK ###
Top
User avatar
johnnieo26
500 Command not understood
Posts: 1
Joined: 2014-04-17 22:30

Re: Can't connect to server

#4 Post by johnnieo26 » 2014-04-17 22:40

I get that same rejection notification on my Dell desktop, with a Netgear R6300v2 router. But my ASUS laptop connects perfectly through the same router. Scratching my head.
Top
zcrazymonkys
500 Command not understood
Posts: 2
Joined: 2014-05-06 01:52

Re: Can't connect to server

#5 Post by zcrazymonkys » 2014-05-06 01:55

I am having a similar problem. I set up the server on my desktop, which is wired to a wireless signal extender. And my laptop is connected to the main router. I can connect using the desktop but not the laptop. no idea why it will not work...
Top
User avatar
boco
Contributor
Posts: 25289
Joined: 2006-05-01 03:28
Location: Germany

Re: Can't connect to server

#6 Post by boco » 2014-05-06 20:51

Software firewall on the desktop?
### BEGIN SIGNATURE BLOCK ###
No support requests per PM! You will NOT get any reply!!!
FTP connection problems? Do yourself a favor and read Network Configuration.
FileZilla connection test: https://filezilla-project.org/conntest.php
### END SIGNATURE BLOCK ###
Top
zcrazymonkys
500 Command not understood
Posts: 2
Joined: 2014-05-06 01:52

Re: Can't connect to server

#7 Post by zcrazymonkys » 2014-05-06 21:19

boco wrote:Software firewall on the desktop?
standard windows firewall but i had allowed filezilla to pass through.
Top
User avatar
boco
Contributor
Posts: 25289
Joined: 2006-05-01 03:28
Location: Germany

Re: Can't connect to server

#8 Post by boco » 2014-05-17 00:48

-Try with Win firewall disabled.
-Search for other firewalls/port blockers. Security suites and Antivirus programs (usually paid ones) are prime suspects.
-If you do SFTP, fzsftp.exe needs to be allowed, too.
### BEGIN SIGNATURE BLOCK ###
No support requests per PM! You will NOT get any reply!!!
FTP connection problems? Do yourself a favor and read Network Configuration.
FileZilla connection test: https://filezilla-project.org/conntest.php
### END SIGNATURE BLOCK ###
Top
riko3000
500 Command not understood
Posts: 1
Joined: 2016-06-26 18:35
First name: Ricko
Last name: Arjevanidze

Re: Can't connect to server

#9 Post by riko3000 » 2016-06-26 18:40

Well, my answer is not for exactly this question, but might be helpful in like that cases... From last updates of FileZilla you can't connect to server simply and in this tutorial you can check how to do dial with that kind of problem. That's might be helpful for "Connection timed out" case:
Last edited by botg on 2016-06-26 18:51, edited 1 time in total.
Reason: Removed link to a video promoting bad practices
Top
danyakarimi
500 Command not understood
Posts: 1
Joined: 2018-03-10 06:52

Re: Can't connect to server

#10 Post by danyakarimi » 2018-03-10 06:59

Hi
For solving the problem of connecting to servers using FileZilla go to windows firewall=> allowed programs=> allow another program and then add FileZilla from where you install it in your computer.
This solved my problem :)
Good Luck.
Top
daitiva
500 Command not understood
Posts: 1
Joined: 2019-08-31 06:37
First name: Daitiva
Last name: Sharma

Re: Can't connect to server

#11 Post by daitiva » 2019-08-31 06:58

I am also having same issue .... but unable to find the solution on web....

please help

Status : Waiting to retry...
Status : Resolving address of ftp.ingenioushub.com
Status : Connecting to 192.185.56.30:21...
Status : Connection established, waiting for welcome message...
Response : 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
Response : 220-You are user number 2 of 150 allowed.
Response : 220-Local time is now 01:33. Server port: 21.
Response : 220-IPv6 connections are also welcome on this server.
Response : 220 You will be disconnected after 15 minutes of inactivity.
Command : AUTH TLS
Response : 502 AUTH TLS OK.
Command : AUTH SSL
Error : Could not connect to server
Top
svetlanafaas
500 Command not understood
Posts: 1
Joined: 2019-09-05 08:15
First name: Svetlana
Last name: Faas

Re: Can't connect to server

#12 Post by svetlanafaas » 2019-09-05 08:20

I have the same problem too:
Status: Verbinde mit ftp.mkdenial.com über SOCKS5-Proxy
Status: Auflösen der IP-Adresse für socks.fsc.net
Status: Verbinde mit 172.24.63.45:1080...
Status: Verbindungsversuch fehlgeschlagen mit "ECONNREFUSED - Verbindung durch Server verweigert".
Fehler: Herstellen der Verbindung zum Server fehlgeschlagen

the connection to server failed

Filezilla was added in windows firewall as allowed programm, but it didn´t solve the problem
Please, help
Top
User avatar
boco
Contributor
Posts: 25289
Joined: 2006-05-01 03:28
Location: Germany

Re: Can't connect to server

#13 Post by boco » 2019-09-05 21:14

daitiva wrote: ↑
2019-08-31 06:58
 I am also having same issue .... but unable to find the solution on web....

please help

Status : Waiting to retry...
Status : Resolving address of ftp.ingenioushub.com
Status : Connecting to 192.185.56.30:21...
Status : Connection established, waiting for welcome message...
Response : 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
Response : 220-You are user number 2 of 150 allowed.
Response : 220-Local time is now 01:33. Server port: 21.
Response : 220-IPv6 connections are also welcome on this server.
Response : 220 You will be disconnected after 15 minutes of inactivity.
Command : AUTH TLS
Response : 502 AUTH TLS OK.
Command : AUTH SSL
Error : Could not connect to server
<Removed, please read two posts down.>
svetlanafaas wrote: ↑
2019-09-05 08:20
 I have the same problem too:
Status: Verbinde mit ftp.mkdenial.com über SOCKS5-Proxy
Status: Auflösen der IP-Adresse für socks.fsc.net
Status: Verbinde mit 172.24.63.45:1080...
Status: Verbindungsversuch fehlgeschlagen mit "ECONNREFUSED - Verbindung durch Server verweigert".
Fehler: Herstellen der Verbindung zum Server fehlgeschlagen

the connection to server failed

Filezilla was added in windows firewall as allowed programm, but it didn´t solve the problem
Please, help
Your SOCKS5 proxy server denies connection, for some reason. If you can, try a direct connection.
### BEGIN SIGNATURE BLOCK ###
No support requests per PM! You will NOT get any reply!!!
FTP connection problems? Do yourself a favor and read Network Configuration.
FileZilla connection test: https://filezilla-project.org/conntest.php
### END SIGNATURE BLOCK ###
Top
User avatar
botg
Site Admin
Posts: 33182
Joined: 2004-02-23 20:49
First name: Tim
Last name: Kosse
Contact:
Contact botg

Re: Can't connect to server

#14 Post by botg » 2019-09-06 10:55

Doesn't look like a server-side bug to me. Look at the reply to the AUTH command, that looks like a malicious firewall has injected a fake response code.
Top
User avatar
boco
Contributor
Posts: 25289
Joined: 2006-05-01 03:28
Location: Germany

Re: Can't connect to server

#15 Post by boco » 2019-09-06 21:57

Command : AUTH TLS
Response : 502 AUTH TLS OK.
Must have been blind, didn't see the 502 response code.

Yes, in this case something in between injects false response codes, in order to make FTP over TLS fail, in the hope that client and server fall back to plain FTP (which exposes any traffic to the monster-in-the-middle (MITM)). Such behavior is very malware-like and downright criminal ("Downgrade attack").
FileZilla does never fall back to a lower security or even none at all, thus you are safe from that type of attack.

Find the responsible software or device, and correct that behavior. If it can't be corrected, get rid of it.
### BEGIN SIGNATURE BLOCK ###
No support requests per PM! You will NOT get any reply!!!
FTP connection problems? Do yourself a favor and read Network Configuration.
FileZilla connection test: https://filezilla-project.org/conntest.php
### END SIGNATURE BLOCK ###
Top
Post Reply

Return to “General Discussion”