ssh-keygen between SuSE and FreeBSD

Gavin Spomer spomerg at cwu.EDU
Thu Aug 14 17:25:16 UTC 2008

>>> Marian Hettwer <mh at> 08/14/08 9:43 AM >>>
> Hi Gavin,
> From your Suse, try to run the ssh commando with "-v" or even -vv or -vvv
> to get debugging output.
> If you can't figure out what the debugging output wants to tell you, send
> it to the list.
> But complete, copy 'n' paste please :)

Sure, no problem: (edited)

myusername at suseserver:~> ssh -v myusername at freebsdserver
OpenSSH_4.2p1, OpenSSL 0.9.8a 11 Oct 2005
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to freebsdserver [] port 22.
debug1: Connection established.
debug1: identity file /home/myusername/.ssh/id_rsa type -1
debug1: identity file /home/myusername/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.5p1 FreeBSD-20061110
debug1: match: OpenSSH_4.5p1 FreeBSD-20061110 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.2
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'freebsdserver' is known and matches the DSA host key.
debug1: Found key in /home/myusername/.ssh/known_hosts:6
debug1: ssh_dss_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /home/myusername/.ssh/id_rsa
debug1: Trying private key: /home/myusername/.ssh/id_dsa
debug1: Next authentication method: keyboard-interactive
debug1: Authentication succeeded (keyboard-interactive).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8
Last login: Thu Aug 14 10:08:12 2008 from suseserver
Welcome to FreeBSD!
[myusername at freebsdserver ~]$

> I'm not quite sure right now why you're using rsa keys. I'm always using
> dsa keys (ssh-keygen -t dsa). It comes to my mind, that rsa keys are for
> ssh version 1, while dsa keys are for ssh version 2.
> But I could be wrong here ;)
> No man ssh handy right now, sorry.

If that's true, then I believe I will start using the dsa ones! I think I chose rsa because the FreeBSD manual indicated I could use either and I could only find settings for enabling rsa in sshd_config on the remote servers, but I'll look again...

> > I noticed you made a distinction between password and passphrase. Could
> > you please explain the difference?
> >
> Well, when you generate a rsa or dsa key, you get asked to enter a
> passphrase for that key.
> So a passphrase is basically the password to your ssh key.
> While the password is the real password of the local user you're trying to
> be. Like ssh foo at bar, the password would be the password of the user foo at
> host bar.
> And since everybody likes to know wether someone is talking about the
> "password" of a ssh key or the password of a local user, you say passphrase
> to keys and password to local users.
> That's how I would explain it :))

Good explanation. I grok, I grok. :D

> Cheers,
> Marian

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