SSH connection problem

Discussion in 'Server Operation' started by gral, Nov 5, 2007.

  1. gral

    gral Member

    Hello, recently i've had troubles connecting via SSH to of my servers, the error output is very weird,

    [[email protected] ~]# ssh
    Connection to closed.

    I can connect server1 to others of my servers and can't to others ones and i receive the same error, there are not wrappers on them, the ping is great between them, and i cant do a scp o sftp neither, however i can successfully telnet the port 22 of the target host;

    [[email protected] tmp]# telnet server2 22
    Trying xx.xx.xx.xx....
    Connected to (xx.xx.xx.xx).
    Escape character is '^]'.

    The sshd_config is for default there are not configs on it.

    Any clue will be very very helpfully , and sorry for the continous problems :(

    Best Regards!
    Last edited: Nov 5, 2007
  2. falko

    falko Super Moderator ISPConfig Developer

    Do you use something like DenyHosts or fail2ban? Maybe your server got blocked on the other system.
  3. technick

    technick New Member

    This sounds more to me like hosts.deny problem really. Fail2ban adds the offending IP address to iptables and drops all communication to that ip, never giving a straight out rejection.
  4. New Member

    ssh using root ?


    when you not is giving the username that you what to connect with in the command: [[email protected] ~]# ssh
    ssh normaly tries with the username that you currently is using on the host you are connection from and that would be root.
    Some Linux OS sshd configuration dont allow root to login by default.
    try look for
    PermitRootLogin no

    in your sshd_config ?
  5. gral

    gral Member

    Thanxs everybody for yours replys the problem was solved and was a automatic script execution when somenone login via ssh the server2 from server1.


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