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Date:      Sun, 15 Nov 2009 19:21:15 -0500
From:      Jon Radel <jon@radel.com>
To:        Gary Kline <kline@thought.org>
Cc:        FreeBSD Mailing List <freebsd-questions@freebsd.org>
Subject:   Re: no sshd on new server...
Message-ID:  <4B009AFB.2070806@radel.com>
In-Reply-To: <20091116010014.f3ca28de.freebsd@edvax.de>
References:  <20091115234930.GA11465@thought.org> <20091116010014.f3ca28de.freebsd@edvax.de>

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Polytropon wrote:
> On Sun, 15 Nov 2009 15:49:33 -0800, Gary Kline <kline@thought.org> wrote:
>> 	ok, i have my new server-to-be underway but having problems exec'ing
>> 	/usr/sbin/sshd.  i can ssh out to existing computers, but cannot ssh
>> 	or scp stuff in.  so my question is:  how do i create
>> 	/etc/ssh/ssh_host_dsa_key ?  checking around does no good.
> 
> Maybe I remember incorrectly, but doesn't sshd create this file
> on its first startup?
> 
> Do you have
> 
> 	sshd_enable="YES"
> 
> in /etc/rc.conf? Is sshd running, or do you get error messages
> regarding the host DSA key file?
> 
> 
> 
> 

This is version specific.  If you're really old fashioned (v4, for 
example ;-), you can look in /etc/rc.network for a cookbook:

         case ${sshd_enable} in
         [Yy][Ee][Ss])
                 if [ -x /usr/bin/ssh-keygen ]; then
                         if [ ! -f /etc/ssh/ssh_host_key ]; then
                                 echo ' creating ssh1 RSA host key';
                                 /usr/bin/ssh-keygen -t rsa1 -N "" \
                                         -f /etc/ssh/ssh_host_key
                         fi
                         if [ ! -f /etc/ssh/ssh_host_rsa_key ]; then
                                 echo ' creating ssh2 RSA host key';
                                 /usr/bin/ssh-keygen -t rsa -N "" \
                                         -f /etc/ssh/ssh_host_rsa_key
                         fi
                         if [ ! -f /etc/ssh/ssh_host_dsa_key ]; then
                                 echo ' creating ssh2 DSA host key';
                                 /usr/bin/ssh-keygen -t dsa -N "" \
                                         -f /etc/ssh/ssh_host_dsa_key
                         fi
                 fi
                 ;;
         esac

or just reboot after setting sshd_enable="YES".  In newer versions, 
"/etc/rc.d/sshd start" checks if the files exist and creates any of the 
3 which don't, or you can force this check and creation with 
"/etc/rc.d/sshd keygen".  In all cases that I know of, it's just the 
ssh-keygen program being run on your behalf.


-- 

--Jon Radel
jon@radel.com

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