SSH Broken After Updates?

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#1

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?

–
jason331

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#2

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.

–
jason331

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#3

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?

–
ZStefan

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#4

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

–
jason331

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#5

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/images/OpenSSLScreenshot-y2base.png]

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

–
jason331

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#6

Are you sure the port is open on firewall?

–
ikurtram

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#7

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.

–
jason331

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#8

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.

–
ZStefan

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#9

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]

–
ikurtram

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