Re: OpenSSHd problem.

From: Ulrich Keil (ulrich@der-keiler.de)
Date: 07/31/02 

Date: Wed, 31 Jul 2002 14:01:07 +0200
From: Ulrich Keil <ulrich@der-keiler.de>
To: security-basics@securityfocus.com

On Mon, Jul 29, 2002 at 02:13:10PM +0100, Lee Rich wrote:
> I have just installed OpenSSH2.9p2 (from the RH7.2 RPM's) and configured the config file to my liking.

Check these links:

http://www.securityfocusonline.com/archive/1/279134/2002-06-21/2002-06-27/0
http://www.securityfocusonline.com/archive/1/279518/2002-06-21/2002-06-27/0
http://www.der-keiler.de/Mailing-Lists/VulnWatch/2002-07/0004.html

and update your OpenSSH first.

> However I don't have any host key files.
> SSHd won't run unless they are present witin the specified directory.
> Is there a way to generate a host key.. or am I missing something here?

Normally, ssh on RedHat will generate these keys on the first startup.

Here is the way this is done:

ssh-keygen -b 1024 -f /etc/ssh/ssh_host_key -N ''
ssh-keygen -t dsa -b 1024 -f /etc/ssh/ssh_host_dsa_key -N ''
ssh-keygen -t rsa -b 1024 -f /etc/ssh/ssh_host_rsa_key -N ''

Ulrich 

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