Connection issues - FATAL ERROR: Received unexpected end-of-file from SFTP server

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JCFI
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Connection issues - FATAL ERROR: Received unexpected end-of-file from SFTP server

#1 Post by JCFI » 2020-01-03 09:19

Hi,

I'm new to Filezilla. Only used it to connect to one server and had no issues previously. Now I try to connect but keep getting the following message:

Trace: Session sent command exit status 14
Error: FATAL ERROR: Received unexpected end-of-file from SFTP server
Trace: CSftpControlSocket::OnTerminate without error
Trace: CControlSocket::ResetOperation(66)
Trace: CSftpConnectOpData::Reset(66) in state 3
Error: Could not connect to server

The contact using the server on the other end is having no issues. I tried installing the latest version (3.46.3) but have the same issue.

Operating system:
Name: Windows 10 (build 18362), 64-bit edition
Version: 10.0
Platform: 64-bit system
CPU features: sse sse2 sse3 ssse3 sse4.1 sse4.2 avx avx2 aes pclmulqdq rdrnd bmi2 bmi2 adx lm

I tried using the configuration wizard and got the following:

Connecting to probe.filezilla-project.org
Connection established, waiting for welcome message.
Response: 220 FZ router and firewall tester ready
USER FileZilla
Response: 331 Give any password.
PASS 3.46.3
Response: 230 logged on.
Checking for correct external IP address
IP XXXXXXXX
Response: 200 OK
PREP 56883
Response: 200 Using port 56883, data token 60823885
PORT 87,198,163,50,222,51
Response: 200 PORT command successful
LISTResponse: 150 opening data connection
Response: 503 Failure of data connection.
Server sent unexpected reply.
Connection closed

Anyone have ideas on what to try next?

Thanks in advance.

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botg
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Re: Connection issues - FATAL ERROR: Received unexpected end-of-file from SFTP server

#2 Post by botg » 2020-01-03 09:33

Please post a complete log, snippets are useless.

JCFI
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Re: Connection issues - FATAL ERROR: Received unexpected end-of-file from SFTP server

#3 Post by JCFI » 2020-01-03 11:21

Status: Connecting to 77.75.100.130:22022...
Trace: CControlSocket::SendNextCommand()
Trace: CSftpConnectOpData::Send() in state 0
Trace: Going to execute C:\Program Files\FileZilla FTP Client\fzsftp.exe
Response: fzSftp started, protocol_version=9
Trace: CSftpConnectOpData::ParseResponse() in state 0
Trace: CControlSocket::SendNextCommand()
Trace: CSftpConnectOpData::Send() in state 3
Command: open "Firel@77.75.100.130" 22022
Trace: Looking up host "77.75.100.130" for SSH connection
Trace: Connecting to 77.75.100.130 port 22022
Trace: We claim version: SSH-2.0-PuTTYFileZilla_3.46.3
Trace: Remote version: SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.8
Trace: Using SSH protocol version 2
Trace: Doing ECDH key exchange with curve Curve25519 and hash SHA-256 (unaccelerated)
Trace: Server also has ecdsa-sha2-nistp256/ssh-rsa host keys, but we don't know any of them
Trace: Host key fingerprint is:
Trace: ssh-ed25519 255 62:8e:a1:e5:e0:20:51:74:1b:27:22:08:b5:29:05:8e FZWfAQSx2AC5GDEMC2Z1eX4nSiqxGvy2axEhYKLeOEw=
Trace: Initialised AES-256 SDCTR (AES-NI accelerated) outbound encryption
Trace: Initialised HMAC-SHA-256 (unaccelerated) outbound MAC algorithm
Trace: Initialised AES-256 SDCTR (AES-NI accelerated) inbound encryption
Trace: Initialised HMAC-SHA-256 (unaccelerated) inbound MAC algorithm
Command: Pass: ***********
Trace: Sent password
Trace: Access granted
Trace: Opening main session channel
Trace: Opened main channel
Trace: Started a shell/command
Status: Connected to 77.75.100.130
Trace: Session sent command exit status 14
Error: FATAL ERROR: Received unexpected end-of-file from SFTP server
Trace: CSftpControlSocket::OnTerminate without error
Trace: CControlSocket::ResetOperation(66)
Trace: CSftpConnectOpData::Reset(66) in state 3
Error: Could not connect to server
Status: Waiting to retry...
Status: Connecting to 77.75.100.130:22022...
Trace: CControlSocket::SendNextCommand()
Trace: CSftpConnectOpData::Send() in state 0
Trace: Going to execute C:\Program Files\FileZilla FTP Client\fzsftp.exe
Response: fzSftp started, protocol_version=9
Trace: CSftpConnectOpData::ParseResponse() in state 0
Trace: CControlSocket::SendNextCommand()
Trace: CSftpConnectOpData::Send() in state 3
Command: open "Firel@77.75.100.130" 22022
Trace: Looking up host "77.75.100.130" for SSH connection
Trace: Connecting to 77.75.100.130 port 22022
Trace: We claim version: SSH-2.0-PuTTYFileZilla_3.46.3
Trace: Remote version: SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.8
Trace: Using SSH protocol version 2
Trace: Doing ECDH key exchange with curve Curve25519 and hash SHA-256 (unaccelerated)
Trace: Server also has ecdsa-sha2-nistp256/ssh-rsa host keys, but we don't know any of them
Trace: Host key fingerprint is:
Trace: ssh-ed25519 255 62:8e:a1:e5:e0:20:51:74:1b:27:22:08:b5:29:05:8e FZWfAQSx2AC5GDEMC2Z1eX4nSiqxGvy2axEhYKLeOEw=
Trace: Initialised AES-256 SDCTR (AES-NI accelerated) outbound encryption
Trace: Initialised HMAC-SHA-256 (unaccelerated) outbound MAC algorithm
Trace: Initialised AES-256 SDCTR (AES-NI accelerated) inbound encryption
Trace: Initialised HMAC-SHA-256 (unaccelerated) inbound MAC algorithm
Command: Pass: ***********
Trace: Sent password
Trace: Access granted
Trace: Opening main session channel
Trace: Opened main channel
Trace: Started a shell/command
Status: Connected to 77.75.100.130
Trace: Session sent command exit status 14
Error: FATAL ERROR: Received unexpected end-of-file from SFTP server
Trace: CSftpControlSocket::OnTerminate without error
Trace: CControlSocket::ResetOperation(66)
Trace: CSftpConnectOpData::Reset(66) in state 3
Error: Could not connect to server

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botg
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Re: Connection issues - FATAL ERROR: Received unexpected end-of-file from SFTP server

#4 Post by botg » 2020-01-03 23:55

Trace: Session sent command exit status 14
That is unusual, don't think I've ever seen it before.

Please contact your server administrator or server hosting provider to inquire what exist status 14 means and why the server is sending a SSH2_MSG_CHANNEL_REQUEST packet with this code.

ewilcoxUD
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Re: Connection issues - FATAL ERROR: Received unexpected end-of-file from SFTP server

#5 Post by ewilcoxUD » 2020-01-06 17:35

I have started to get this error message today on a connection that has normally worked fine. WOnder if it has to do with the recent update I just installed

mrian84
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Re: Connection issues - FATAL ERROR: Received unexpected end-of-file from SFTP server

#6 Post by mrian84 » 2020-01-12 18:21

This is definitely a new bug. I am getting the same issue with latest version of Filezilla, used to work before.

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Re: Connection issues - FATAL ERROR: Received unexpected end-of-file from SFTP server

#7 Post by botg » 2020-01-12 20:13

botg wrote:
2020-01-03 23:55
Please contact your server administrator or server hosting provider to inquire what exist status 14 means and why the server is sending a SSH2_MSG_CHANNEL_REQUEST packet with this code.

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