ssh drops connection before prompt, after succesfull password

From: John Morris (john_at_morris.name)
Date: 04/26/03

  • Next message: Steven van de Beek: "PuTTY crashes W98se on exit" 
    Date: 25 Apr 2003 22:47:42 -0700

    I've run into a problem using openssh on a few of my servers. They are
    dropping the connection after a successfull password attempt, but
    before it gets to a prompt. A 'session' would look something like
    this:

    [user@aldebaran user]$ ssh jupiter
    user@jupiter's password:
    Connection to jupiter closed by remote host.
    Connection to jupiter closed.
    [user@aldebaran user]$

    Using verbose mode, it goes like this:

    [user@aldebaran user]$ ssh -v jupiter
    OpenSSH_3.5p1, SSH protocols 1.5/2.0, OpenSSL 0x0090701f
    debug1: Reading configuration data /etc/ssh/ssh_config
    debug1: Applying options for jupiter
    debug1: Applying options for *
    debug1: Rhosts Authentication disabled, originating port will not be
    trusted.
    debug1: ssh_connect: needpriv 0
    debug1: Connecting to jupiter [99.99.99.99] port 22.
    debug1: Connection established.
    debug1: identity file /home/user/.ssh/identity type -1
    debug1: identity file /home/user/.ssh/id_rsa type -1
    debug1: identity file /home/user/.ssh/id_dsa type 2
    debug1: Remote protocol version 2.0, remote software version
    OpenSSH_3.4p1
    debug1: match: OpenSSH_3.4p1 pat OpenSSH*
    debug1: Enabling compatibility mode for protocol 2.0
    debug1: Local version string SSH-2.0-OpenSSH_3.5p1
    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 sent
    debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
    debug1: dh_gen_key: priv key bits set: 134/256
    debug1: bits set: 1548/3191
    debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
    debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
    debug1: Host 'jupiter' is known and matches the RSA host key.
    debug1: Found key in /home/user/.ssh/known_hosts:6
    debug1: bits set: 1614/3191
    debug1: ssh_rsa_verify: signature correct
    debug1: kex_derive_keys
    debug1: newkeys: mode 1
    debug1: SSH2_MSG_NEWKEYS sent
    debug1: waiting for SSH2_MSG_NEWKEYS
    debug1: newkeys: mode 0
    debug1: SSH2_MSG_NEWKEYS received
    debug1: done: ssh_kex2.
    debug1: send SSH2_MSG_SERVICE_REQUEST
    debug1: service_accept: ssh-userauth
    debug1: got SSH2_MSG_SERVICE_ACCEPT
    debug1: authentications that can continue:
    publickey,password,keyboard-interactive
    debug1: next auth method to try is publickey
    debug1: userauth_pubkey_agent: testing agent key
    /home/user/.ssh/id_dsa
    debug1: authentications that can continue:
    publickey,password,keyboard-interactive
    debug1: try privkey: /home/user/.ssh/identity
    debug1: try privkey: /home/user/.ssh/id_rsa
    debug1: try pubkey: /home/user/.ssh/id_dsa
    debug1: authentications that can continue:
    publickey,password,keyboard-interactive
    debug1: next auth method to try is keyboard-interactive
    debug1: authentications that can continue:
    publickey,password,keyboard-interactive
    debug1: next auth method to try is password
    user@jupiter's password:
    debug1: ssh-userauth2 successful: method password
    debug1: channel 0: new [client-session]
    debug1: send channel open 0
    debug1: Entering interactive session.
    debug1: channel_free: channel 0: client-session, nchannels 1
    Connection to jupiter closed by remote host.
    Connection to jupiter closed.
    debug1: Transferred: stdin 0, stdout 0, stderr 77 bytes in 0.1 seconds
    debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 1420.5
    debug1: Exit status -1
    [user@aldebaran user]$

    What could be causing the connection to be closed before the prompt
    shows up? Could there be a clue in the 77 bytes on stderr? and how
    would I get to that info?

    Any help would be appreciated.

    Regards,

    John Morris

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