Host is not communicating for more than 15 seconds....

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te.dirinfo@tunisieeditique.com
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Location:
Tunisia

Host is not communicating for more than 15 seconds....

Hello,
we have an SFTP server and we use WinSCP as client, it was working fine since these days, I'm always getting this error "Host is not communicating for more than 15 seconds" then it abort connection, and the speed in very slow.
I tried to disable optimise connection buffer and increase time more than 15 seconds.
I tried many version of WinSCP but same problem. Please help.

WinSCP log:
. 2021-12-09 11:31:08.166 WinSCP Version 5.17.6 (Build 10516) (OS 10.0.19042 - Windows 10 Enterprise)
. 2021-12-09 11:31:08.166 Configuration: HKCU\Software\Martin Prikryl\WinSCP 2\
. 2021-12-09 11:31:08.166 Log level: Normal
. 2021-12-09 11:31:08.166 Local account: TUNISIEEDITIQUE\mehdi
. 2021-12-09 11:31:08.166 Working directory: C:\Program Files (x86)\WinSCP
. 2021-12-09 11:31:08.166 Process ID: 12500
. 2021-12-09 11:31:08.166 Command-line: "C:\Program Files (x86)\WinSCP\WinSCP.exe" 
. 2021-12-09 11:31:08.166 Time zone: Current: GMT+1 (Paris, Madrid), No DST
. 2021-12-09 11:31:08.166 Warning: System option "Automatically adjust clock for Daylight Saving Time" is disabled, timestamps will not be represented correctly
. 2021-12-09 11:31:08.166 Login time: jeudi 9 décembre 2021 11:31:08
. 2021-12-09 11:31:08.166 --------------------------------------------------------------------------
. 2021-12-09 11:31:08.166 Session name: IT@41.224.0.163 (Site)
. 2021-12-09 11:31:08.166 Host name: 41.224.0.163 (Port: 90)
. 2021-12-09 11:31:08.166 User name: IT (Password: Yes, Key file: No, Passphrase: No)
. 2021-12-09 11:31:08.166 Tunnel: No
. 2021-12-09 11:31:08.166 Transfer Protocol: SFTP (SCP)
. 2021-12-09 11:31:08.166 Ping type: Off, Ping interval: 30 sec; Timeout: 60 sec
. 2021-12-09 11:31:08.166 Disable Nagle: No
. 2021-12-09 11:31:08.166 Proxy: None
. 2021-12-09 11:31:08.166 Send buffer: 0
. 2021-12-09 11:31:08.166 SSH protocol version: 2; Compression: No
. 2021-12-09 11:31:08.166 Bypass authentication: No
. 2021-12-09 11:31:08.166 Try agent: Yes; Agent forwarding: No; TIS/CryptoCard: No; KI: Yes; GSSAPI: Yes
. 2021-12-09 11:31:08.166 GSSAPI: Forwarding: No; Libs: gssapi32,sspi,custom; Custom: 
. 2021-12-09 11:31:08.166 Ciphers: aes,chacha20,blowfish,3des,WARN,arcfour,des; Ssh2DES: No
. 2021-12-09 11:31:08.166 KEX: ecdh,dh-gex-sha1,dh-group14-sha1,rsa,WARN,dh-group1-sha1
. 2021-12-09 11:31:08.166 SSH Bugs: Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto
. 2021-12-09 11:31:08.166 Simple channel: No
. 2021-12-09 11:31:08.166 Return code variable: Autodetect; Lookup user groups: Auto
. 2021-12-09 11:31:08.166 Shell: default
. 2021-12-09 11:31:08.166 EOL: LF, UTF: Auto
. 2021-12-09 11:31:08.166 Clear aliases: Yes, Unset nat.vars: Yes, Resolve symlinks: Yes; Follow directory symlinks: No
. 2021-12-09 11:31:08.166 LS: ls -la, Ign LS warn: Yes, Scp1 Comp: No; Exit code 1 is error: No
. 2021-12-09 11:31:08.166 SFTP Bugs: Auto,Auto
. 2021-12-09 11:31:08.166 SFTP Server: default
. 2021-12-09 11:31:08.166 Local directory: C:\Users\mehdi.TUNISIEEDITIQUE\Desktop, Remote directory: /, Update: Yes, Cache: Yes
. 2021-12-09 11:31:08.166 Cache directory changes: Yes, Permanent: Yes
. 2021-12-09 11:31:08.166 Recycle bin: Delete to: No, Overwritten to: No, Bin path: 
. 2021-12-09 11:31:08.166 DST mode: Unix
. 2021-12-09 11:31:08.166 --------------------------------------------------------------------------
. 2021-12-09 11:31:08.181 Looking up host "41.224.0.163" for SSH connection
. 2021-12-09 11:31:08.181 Connecting to 41.224.0.163 port 90
. 2021-12-09 11:31:08.212 We claim version: SSH-2.0-WinSCP_release_5.17.6
. 2021-12-09 11:31:08.212 Remote version: SSH-2.0-1.82_sshlib Globalscape
. 2021-12-09 11:31:08.212 Using SSH protocol version 2
. 2021-12-09 11:31:08.212 Have a known host key of type rsa2
. 2021-12-09 11:31:08.212 Doing Diffie-Hellman group exchange
. 2021-12-09 11:31:08.282 Doing Diffie-Hellman key exchange using 2048-bit modulus and hash SHA-1 with a server-supplied group
. 2021-12-09 11:31:08.498 Host key fingerprint is:
. 2021-12-09 11:31:08.498 ssh-rsa 2048 d0:74:5f:ea:8a:cd:33:a5:92:c2:76:d2:9b:16:3e:4f jZ4p03UtqHK3MfCQAN1Sqy9GSl4FR6KL5xu9q301CGg=
. 2021-12-09 11:31:08.529 Host key matches cached key
. 2021-12-09 11:31:08.529 Initialised AES-256 SDCTR (AES-NI accelerated) outbound encryption
. 2021-12-09 11:31:08.529 Initialised HMAC-SHA-256 outbound MAC algorithm
. 2021-12-09 11:31:08.529 Initialised AES-256 SDCTR (AES-NI accelerated) inbound encryption
. 2021-12-09 11:31:08.529 Initialised HMAC-SHA-256 inbound MAC algorithm
! 2021-12-09 11:31:08.529 Using username "IT".
! 2021-12-09 11:31:08.551 EFT Server 7.3.6.17 - TUNISIE DIGITAL 
. 2021-12-09 11:31:08.551 Server offered these authentication methods: password,keyboard-interactive
. 2021-12-09 11:31:08.551 Attempting keyboard-interactive authentication
. 2021-12-09 11:31:08.551 Prompt (keyboard interactive, "SSH server authentication", <no instructions>, "Enter password: ")
. 2021-12-09 11:31:08.551 Using stored password.
. 2021-12-09 11:31:08.582 Access granted
. 2021-12-09 11:31:08.582 Opening main session channel
. 2021-12-09 11:31:08.582 Opened main channel
. 2021-12-09 11:31:08.582 Started a shell/command
. 2021-12-09 11:31:08.614 --------------------------------------------------------------------------
. 2021-12-09 11:31:08.614 Using SFTP protocol.
. 2021-12-09 11:31:08.629 Doing startup conversation with host.
> 2021-12-09 11:31:08.629 Type: SSH_FXP_INIT, Size: 5, Number: -1
< 2021-12-09 11:31:08.629 Type: SSH_FXP_VERSION, Size: 5, Number: -1
. 2021-12-09 11:31:08.629 SFTP version 3 negotiated.
. 2021-12-09 11:31:08.629 We believe the server has signed timestamps bug
. 2021-12-09 11:31:08.629 We will use UTF-8 strings until server sends an invalid UTF-8 string as with SFTP version 3 and older UTF-8 strings are not mandatory
. 2021-12-09 11:31:08.629 Changing directory to "/".
. 2021-12-09 11:31:08.629 Getting real path for '/'
> 2021-12-09 11:31:08.629 Type: SSH_FXP_REALPATH, Size: 10, Number: 16
< 2021-12-09 11:31:08.629 Type: SSH_FXP_NAME, Size: 23, Number: 16
. 2021-12-09 11:31:08.629 Real path is '/'
. 2021-12-09 11:31:08.629 Trying to open directory "/".
> 2021-12-09 11:31:08.629 Type: SSH_FXP_LSTAT, Size: 10, Number: 263
< 2021-12-09 11:31:08.645 Type: SSH_FXP_ATTRS, Size: 21, Number: 263
. 2021-12-09 11:31:08.645 Getting current directory name.
. 2021-12-09 11:31:08.730 Listing directory "/".
> 2021-12-09 11:31:08.730 Type: SSH_FXP_OPENDIR, Size: 10, Number: 523
< 2021-12-09 11:31:08.730 Type: SSH_FXP_HANDLE, Size: 10, Number: 523
> 2021-12-09 11:31:08.730 Type: SSH_FXP_READDIR, Size: 10, Number: 780
< 2021-12-09 11:31:08.730 Type: SSH_FXP_STATUS, Size: 22, Number: 780
< 2021-12-09 11:31:08.730 Status code: 1
> 2021-12-09 11:31:08.730 Type: SSH_FXP_CLOSE, Size: 10, Number: 1028
. 2021-12-09 11:31:08.730 ..;D;0;1899-12-30T01:00:00.000Z;0;"" [0];"" [0];---------;0
. 2021-12-09 11:31:08.768 Startup conversation with host finished.
. 2021-12-09 11:31:11.909 Copying 1 files/directories to remote directory "/" - total size: 186 080 975
. 2021-12-09 11:31:11.909   PrTime: Yes; PrRO: No; Rght: rw-r--r--; PrR: No (No); FnCs: N; RIC: 0100; Resume: S (102400); CalcS: Yes; Mask: *.*
. 2021-12-09 11:31:11.909   TM: M; ClAr: No; RemEOF: No; RemBOM: No; CPS: 0; NewerOnly: No; EncryptNewFiles: Yes; ExcludeHiddenFiles: No; ExcludeEmptyDirectories: No; InclM: ; ResumeL: 0
. 2021-12-09 11:31:11.909   AscM: *.*html; *.htm; *.txt; *.php; *.php3; *.cgi; *.c; *.cpp; *.h; *.pas; *.bas; *.tex; *.pl; *.js; .htaccess; *.xtml; *.css; *.cfg; *.ini; *.sh; *.xml
. 2021-12-09 11:31:11.909 Getting real path for '/'
> 2021-12-09 11:31:11.909 Type: SSH_FXP_REALPATH, Size: 10, Number: 1296
< 2021-12-09 11:31:11.909 Type: SSH_FXP_STATUS, Size: 21, Number: 1028
. 2021-12-09 11:31:11.909 Discarding reserved response
< 2021-12-09 11:31:11.926 Type: SSH_FXP_NAME, Size: 23, Number: 1296
. 2021-12-09 11:31:11.926 Real path is '/'
. 2021-12-09 11:31:11.926 File: 'C:\Users\mehdi.TUNISIEEDITIQUE\Desktop\28_RL_202108_MA.zip' [2021-09-02T13:37:47.000Z] [186080975]
. 2021-12-09 11:31:11.926 Copying "C:\Users\mehdi.TUNISIEEDITIQUE\Desktop\28_RL_202108_MA.zip" to remote directory started.
. 2021-12-09 11:31:11.926 Binary transfer mode selected.
. 2021-12-09 11:31:11.926 Checking existence of file.
> 2021-12-09 11:31:11.926 Type: SSH_FXP_LSTAT, Size: 29, Number: 1543
< 2021-12-09 11:31:11.926 Type: SSH_FXP_STATUS, Size: 33, Number: 1543
< 2021-12-09 11:31:11.926 Status code: 2
. 2021-12-09 11:31:11.926 Checking existence of partially transferred file.
> 2021-12-09 11:31:11.926 Type: SSH_FXP_LSTAT, Size: 38, Number: 1799
< 2021-12-09 11:31:11.926 Type: SSH_FXP_STATUS, Size: 33, Number: 1799
< 2021-12-09 11:31:11.926 Status code: 2
. 2021-12-09 11:31:11.926 Opening remote file.
> 2021-12-09 11:31:11.926 Type: SSH_FXP_OPEN, Size: 54, Number: 2051
< 2021-12-09 11:31:11.926 Type: SSH_FXP_HANDLE, Size: 10, Number: 2051
> 2021-12-09 11:31:11.926 Type: SSH_FXP_WRITE, Size: 32790, Number: 2566
. 2021-12-09 11:35:02.463 Waiting for dispatching send buffer timed out, asking user what to do.
. 2021-12-09 11:35:02.463 Asking user:
. 2021-12-09 11:35:02.463 **Host is not communicating for 60 seconds.
. 2021-12-09 11:35:02.463 
. 2021-12-09 11:35:02.463 Wait for another 60 seconds?** ()
. 2021-12-09 11:36:02.656 Attempt to close connection due to fatal exception:
* 2021-12-09 11:36:02.656 **Terminated by user.**
. 2021-12-09 11:36:02.656 Closing connection.
. 2021-12-09 11:36:02.656 Sending special code: 1
. 2021-12-09 11:36:03.166 Connection was lost, asking what to do.
. 2021-12-09 11:36:03.166 Asking user:
. 2021-12-09 11:36:03.166 **Terminated by user.** ()
* 2021-12-09 11:36:07.623 (ESshFatal) **Terminated by user.**
* 2021-12-09 11:36:07.623 Copying files to remote side failed.

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martin
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Re: Host is not communicating for more than 15 seconds....

Did you try upgrading your SFTP server? The "1.82_sshlib GlobalSCAPE" seems to be pretty ancient.

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martin
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Re: Host is not communicating for more than 15 seconds....

I have found almost decade old references to "1.82_sshlib GlobalSCAPE". So yes, it might be the issue.

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