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From: Andrew Reitz <ajr9@po.cwru.edu>
Date: Wed, 31 May 2006 15:30:20 -0700
To: FreeBSD Questions <questions@freebsd.org>
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Subject: Re: Problems with sshd on FreeBSD 4.11-RELEASE
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On May 31, 2006, at 3:26 PM, Andrew Reitz wrote:

> Hello,
>
> For reasons that I don't want to go into here, I have recently  
> downgraded my principal FreeBSD server from 6.1 to 4.11-RELEASE. I  
> did this by installing a fresh copy of FreeBSD 4.11 on a clean HD,  
> and then I rsync'd all of my data over.
>
> Everything has been working fine, until I tried to SSH to the box  
> this afternoon. While everything was working fine this morning, now  
> sshd hangs up immediately on all clients that attempt to connect.  
> In /var/log/messages, I see errors like this for every ssh  
> connection attempt:
>
> May 31 15:21:06 redefine sshd[8543]: error: ssh_dss_sign: sign failed
> May 31 15:21:06 redefine sshd[8543]: fatal: mm_answer_sign:  
> key_sign failed
>
> Google hasn't enlightened me at all. This was *just* working a few  
> hours ago, and now, nada. Does anyone on this list have any ideas?

Curiously, I just restarted sshd, and now things are working again.  
Has anybody ever seen this before?

-Andy.