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Thread: SSH Broken After Updates?

  1. #1
    jason331 NNTP User

    Default SSH Broken After Updates?


    Hi everyone,

    I just did a clean install of OpenSuSE 11.0 and performed all the
    available updates as well. After rebooting when I try to SSH into my
    SuSE workstation I get:


    PuTTY Fatal Error
    ---------------------------
    Server unexpectedly closed network connection
    ---------------------------

    I don't see anything relevant in /var/log/messages. I've tried
    rebooting and restarting the SSHD service. Any ideas?


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  2. #2
    jason331 NNTP User

    Default Re: SSH Broken After Updates?


    More information:

    I have tried SSH from multiple workstations; all with the same error.
    There are no firewalls between anything I am trying to SSH from and my
    SuSE box and the firewall is disabled on SuSE. I was able to SSH in
    before all the updates and subsequent reboot.


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  3. #3
    ZStefan NNTP User

    Default Re: SSH Broken After Updates?


    This used to happen to me years ago.

    Try to login from a Linux computer with verbose options -v -v and/or
    with -2 -Y.

    Also check the port on which sshd is running.

    Can you login into yourself from the same PC?


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  4. #4
    jason331 NNTP User

    Default Re: SSH Broken After Updates?


    SSHD is running on the default port (22) per the following information
    in /var/log/messages:

    "Server listening on 0.0.0.0 port 22"

    When I try to SSH from another SuSE box I get:

    OpenSSH_4.6p1, OpenSSL 0.9.8e 23 Feb 2007
    debug1: Reading configuration data /etc/ssh/ssh_config
    debug1: Applying options for *
    debug2: ssh_connect: needpriv 0
    debug1: Connecting to maia1 [192.168.0.7] 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 -1
    ssh_exchange_identification: Connection closed by remote host

    If I try to SSH locally on the box having this problem I get:

    OpenSSH_5.0p1, OpenSSL 0.9.8a 11 Oct 2005
    debug1: Reading configuration data /etc/ssh/ssh_config
    debug1: Applying options for *
    debug2: ssh_connect: needpriv 0
    debug1: Connecting to maia1 [127.0.0.2] port 22.
    debug1: Connection established.
    ssh: symbol lookup error: ssh: undefined symbol:
    EVP_CIPHER_CTX_key_length


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  5. #5
    jason331 NNTP User

    Default Re: SSH Broken After Updates?


    More information:

    I am trying to build a 'Maia Mailguard' (http://www.maiamailguard.com)
    anti-spam gateway for my email system and one of the installation steps
    is to install OpenSSL-devel from the SLES 10.2 DVD. When I performed
    that step I got the following message:

    [image:
    http://www.jasonsconsulting.com/imag...ot-y2base.png]

    I downgraded openssl per the message and rebooted later on. That's when
    all the trouble started.


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  6. #6
    ikurtram NNTP User

    Default Re: SSH Broken After Updates?


    Are you sure the port is open on firewall?


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  7. #7
    jason331 NNTP User

    Default Re: SSH Broken After Updates?


    There's no firewall between the workstations and my SuSE box. They are
    all literally plugged into the same switch on the same local LAN. I can
    ping, use webmin, port 80, etc. Just SSH doesn't work.

    The firewall on the SuSE box is disabled since it is not exposed to the
    outside internet.


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  8. #8
    ZStefan NNTP User

    Default Re: SSH Broken After Updates?


    Evidently there is a mismatch in packages' versions.

    Maybe, instead of

    OPENSSL-DEVEL FROM THE SLES 10.2 DVD,

    you can install

    LIBOPENSSL-DEVEL

    for openSUSE 11.0.


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  9. #9
    ikurtram NNTP User

    Default Re: SSH Broken After Updates?


    jason331;1904401 Wrote:
    > There's no firewall between the workstations and my SuSE box. They are
    > all literally plugged into the same switch on the same local LAN. I can
    > ping, use webmin, port 80, etc. Just SSH doesn't work.
    >
    > The firewall on the SuSE box is disabled since it is not exposed to the
    > outside internet.


    How about OpenSuse's software firewall?? (YAST -> Security & Users ->
    Firewall -> Allowed Services)

    EDIT: Nevermind... looks like this firewall is only for "External
    zone". So, I guess you really don't need to worry about it.

    [image: http://e.imagehost.org/0308/Firewall.png]


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