My sftp -v to host returns,
Connecting to xxx.xx.xx.xx... OpenSSH_3.9p1, OpenSSL 0.9.7a Feb 19 2003 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to xxx.xx.xx.xx [xxx.xx.xx.xx] port 22. debug1: Connection established. debug1: permanently_set_uid: 0/0 debug1: identity file /root/.ssh/id_rsa type 1 debug1: identity file /root/.ssh/id_dsa type 2 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3 debug1: match: OpenSSH_5.3 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_3.9p1 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-cbc hmac-md5 none debug1: kex: client->server aes128-cbc hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host 'xxx.xx.xx.xx' is known and matches the RSA host key. debug1: Found key in /root/.ssh/known_hosts:63 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Next authentication method: publickey debug1: Offering public key: /root/.ssh/id_rsa debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Offering public key: /root/.ssh/id_dsa debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Next authentication method: keyboard-interactive debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Next authentication method: password email@example.com's password: debug1: Authentication succeeded (password). debug1: channel 0: new [client-session] debug1: Entering interactive session. debug1: channel 0: free: client-session, nchannels 1 debug1: fd 0 clearing O_NONBLOCK Read from remote host xxx.xx.xx.xx: Connection reset by peer debug1: Transferred: stdin 0, stdout 0, stderr 61 bytes in 0.0 seconds debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 60334.5 debug1: Exit status -1
This only occurs with this user. I created a test user which works and other existing users don't have and issue (well no reported issues by users).