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Archived Forum PostQuestion:
please let me know reason
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2014.07.24 14:32:48 FTP Connection Error.
Server Name : 10.179.113.161, Port# : 22.
ChilkatLog:
Connect_SFtp:
DllDate: Jun 10 2014
ChilkatVersion: 9.5.0.40
UnlockPrefix:
Username:
Architecture: Little Endian; 32-bit
Language: Visual C++ 10.0 (32-bit)
VerboseLogging: 0
SftpVersion: 0
hostname: 10.179.113.161
port: 22
Established TCP/IP connection with SSH server
clientIdentifier: SSH-2.0-PuTTY_Local:_May_11_2009_17:22:38
Sending client identifier...
Done sending client identifier.
Reading server version...
initialDataFromSshServer: SSH-2.0-OpenSSH_4.3
serverVersion: SSH-2.0-OpenSSH_4.3
KeyExchangeAlgs:
algorithm: diffie-hellman-group-exchange-sha1
algorithm: diffie-hellman-group14-sha1
algorithm: diffie-hellman-group1-sha1
--KeyExchangeAlgs
HostKeyAlgs:
algorithm: ssh-rsa
algorithm: ssh-dss
--HostKeyAlgs
EncCS:
algorithm: arcfour
algorithm: aes128-ctr
algorithm: aes192-ctr
algorithm: aes256-ctr
--EncCS
EncSC:
algorithm: arcfour
algorithm: aes128-ctr
algorithm: aes192-ctr
algorithm: aes256-ctr
--EncSC
MacCS:
algorithm: hmac-sha1
--MacCS
MacSC:
algorithm: hmac-sha1
--MacSC
CompCS:
algorithm: none
algorithm: zlib@openssh.com
--CompCS
CompSC:
algorithm: none
algorithm: zlib@openssh.com
--CompSC
Unable to agree upon server-to-client encryption algorithm.
Unable to agree upon client-to-server encryption algorithm.
MAC: HMAC-SHA1
MAC: HMAC-SHA1
Compression: zlib@openssh.com
Compression: zlib@openssh.com
Key Exchange: DH Group Exchange SHA1
Host Key Algorithm: DSS
numBits: 128
pbits: 1024
Using GEX Group.
Sending KEX_DH_GEX_REQUEST...
pbits: 1024
sshRawPacket: Socket connection closed.
sshDhGex: Socket connection closed.
Failed to read KEX_DH_GEX_REQUEST response
Failed.
--Connect_SFtp
--ChilkatLog
I was not able to connect to that server. However, I see the following in the LastErrorText:
Unable to agree upon server-to-client encryption algorithm.But this make no sense because Chilkat supports the encryption algorithms listed by the server. I'd need to establish a connection to that server for testing..Unable to agree upon client-to-server encryption algorithm.
Apparently your server is OpenSSH 4.3 (which is somewhat old) and my information indicates that OpenSSH (at that time) did not correctly implement the AES CTR mode algorithms. Chilkat does not indicate support for the AES CTR algorithms when the SSH server is OpenSSH 3. or 4.. These versions of OpenSSH are circa 2006. The latest release is OpenSSH 6.6: March 16, 2014
I get the same issue from time to time, so on 1st failure I send the file to a retry server, and it continues to fail over and over.
If I initiate the transaction as new it works. The destination server does have a problem and they do some sort of reset.
You said 6.6 what is this 7.5??
initialDataFromSshServer=SSH-2.0-WS_FTP-SSH_7.5