Opened 7 years ago

Last modified 7 years ago

#7935 new Bug report

High speed sFTP transfers failing

Reported by: pboeyke1 Owned by:
Priority: high Component: FileZilla Client
Keywords: Cc:
Component version: Operating system type: Windows
Operating system version:


OS : Win XP-SP3
FileZilla : 3.5.3
Protocol : sFTP

Uploading large files (1GB) using high-speeds networks, (speeds in excess if 8MB/Sec) fail with below error message

Error: File transfer failed after transferring 762,900,480 bytes in 226 seconds

Applying FileZilla Speed-Limit clipping speed to 3000 KiB/Sec allows to transfer file successfully.
Using FileZilla transfer speeds from 4000Kib/Sec --> "unlimited" speed option causes transfers to fail.

We have tested transfering same file(s) using HP-UX sftp client and these upload flawless, speeds seen 6-7MB/Sec.

OpenSSH_4.4p1-hpn12v11, OpenSSL 0.9.7l 28 Sep 2006
HP-UX Secure Shell-A.04.40.011, HP-UX Secure Shell version

Change History (2)

comment:1 Changed 7 years ago by pboeyke1

Status: Listing directory /ITS_WISE_Test001/
Trace: CSftpControlSocket::ListParseResponse()
Trace: CSftpControlSocket::ResetOperation(0)
Trace: CControlSocket::ResetOperation(0)
Trace: CSftpControlSocket::ParseSubcommandResult(0)
Trace: CSftpControlSocket::FileTransferSubcommandResult()
Trace: CSftpControlSocket::SendNextCommand()
Trace: FileTransferSend()
Command: put "C:\Documents and Settings\pboeyke1\Desktop\GB1.txt" "GB1.txt"
Status: local:C:\Documents and Settings\pboeyke1\Desktop\GB1.txt => remote:/ITS_WISE_Test001/GB1.txt
Trace: Initiating key re-exchange (too much data sent)
Trace: Doing Diffie-Hellman group exchange
Trace: Doing Diffie-Hellman key exchange with hash SHA-1
Trace: Initialised AES-256 SDCTR client->server encryption
Trace: Initialised HMAC-SHA1 client->server MAC algorithm
Trace: Initialised AES-256 SDCTR server->client encryption
Trace: Initialised HMAC-SHA1 server->client MAC algorithm
Error: Connection timed out
Trace: CControlSocket::DoClose(2050)
Trace: CSftpControlSocket::ResetOperation(2114)
Trace: CControlSocket::ResetOperation(2114)

Trace: CFileZillaEnginePrivate::ResetOperation(2114)
Trace: CControlSocket::DoClose(64)
Trace: CControlSocket::DoClose(64)
Status: Connecting to
Trace: Going to execute "C:\apps\FileZilla FTP Client\fzsftp.exe"

comment:2 Changed 7 years ago by pboeyke1

Priority: normalhigh
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