Occasionally occuring problem with private/public key
Hello,
I have set up a scheduled process which connects automatically every hour to a proftpd server via sftp. I am authenticating with public/private key and it works fine like 98% of the time. But sometimes the server is refusing the key with the following error:
Here are the server logs:
It seems like the problem only occurs with WinSCP Client. Similiar scripts with other clients are working fine
Is there a solution to this problem?
I have set up a scheduled process which connects automatically every hour to a proftpd server via sftp. I am authenticating with public/private key and it works fine like 98% of the time. But sometimes the server is refusing the key with the following error:
echo on option batch abort batch abort option confirm off confirm off option reconnecttime off reconnecttime off option transfer binary transfer binary open testuser@testserver.de Searching for host... Connecting to host... Authenticating... Using username "testuser". Authenticating with public key "rsa-key-20131022". Server refused public-key signature despite accepting key! Password: Connection has been unexpectedly closed. Server sent command exit status 0. Authentication log (see session log for details): Using username "testuser". Authenticating with public key "rsa-key-20131022". Server refused public-key signature despite accepting key!
Here are the server logs:
Nov 04 23:04:04 mod_sftp/0.9.8[6620]: received client version 'SSH-2.0-WinSCP_release_5.1.7' Nov 04 23:04:04 mod_sftp/0.9.8[6620]: handling connection from SSH2 client 'WinSCP_release_5.1.7' Nov 04 23:04:04 mod_sftp/0.9.8[6620]: + Session key exchange: diffie-hellman-group-exchange-sha1 Nov 04 23:04:04 mod_sftp/0.9.8[6620]: + Session server hostkey: ssh-rsa Nov 04 23:04:04 mod_sftp/0.9.8[6620]: + Session client-to-server encryption: aes256-ctr Nov 04 23:04:04 mod_sftp/0.9.8[6620]: + Session server-to-client encryption: aes256-ctr Nov 04 23:04:04 mod_sftp/0.9.8[6620]: + Session client-to-server MAC: hmac-sha1 Nov 04 23:04:04 mod_sftp/0.9.8[6620]: + Session server-to-client MAC: hmac-sha1 Nov 04 23:04:04 mod_sftp/0.9.8[6620]: + Session client-to-server compression: none Nov 04 23:04:04 mod_sftp/0.9.8[6620]: + Session server-to-client compression: none Nov 04 23:04:04 mod_sftp/0.9.8[6620]: sending acceptable userauth methods: password,publickey Nov 04 23:04:04 mod_sftp/0.9.8[6620]: public key MD5 fingerprint: a1:b2:c3:d4:e5:f6:g7:h8:i9:j0:k1:l2:m3:n4:o5:p6 Nov 04 23:04:04 mod_sftp/0.9.8[6620]: sending publickey OK Nov 04 23:04:04 mod_sftp/0.9.8[6620]: public key MD5 fingerprint: a1:b2:c3:d4:e5:f6:g7:h8:i9:j0:k1:l2:m3:n4:o5:p6 Nov 04 23:04:04 mod_sftp/0.9.8[6620]: error verifying RSA signature: Nov 04 23:04:04 mod_sftp/0.9.8[6620]: failed to verify 'ssh-rsa' signature on public key auth request for user 'testuser'
It seems like the problem only occurs with WinSCP Client. Similiar scripts with other clients are working fine
Is there a solution to this problem?
