Mac OSX -> linux x11Forwarding struggles, invalid name errors?

From: Todd H. (comphelp_at_toddh.net)
Date: 10/12/05 

Date: 12 Oct 2005 10:05:12 -0500

Greetings,

I'm having a heck of a time getting ssh X11Forwarding working from a
mac OS X 10.3.9 box to any Linux ssh server. I haven't tried other
servers as I don't have access to others. I've done a lot of X11
forwarding in the past (but never using the Mac client), and this
issue seems to be different than any I've previously experienced.

I suspect these "invalid name was supplied" errors may be related (see
-v output below). This seems to happen whether sshing by IP or by
hostname. I'd also welcome what the best way to upgrade an openssh
client on an OSX box is (fink?), as I suspect a client upgrade may be
what's needed here.

Thanks for any insight or advice!

Linux Openssh SSH-2.0-OpenSSH_4.2 server config:
USERID@server ~ $ sudo grep X11 /etc/ssh/sshd_config
X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost yes

Client config:
OSX-Client-Machine:~ localuser$ grep X11 /etc/ssh_config
ForwardX11 yes
[which is the directive the man page suggets. No user specific ~/.ssh/ssh_config present]

-v log of a sample session (ip and userid's modified)
----------------------------------------------------------------------
localuserid$ ssh -v -X USERID@10.n.n.n
OpenSSH_3.6.1p1+CAN-2004-0175, SSH protocols 1.5/2.0, OpenSSL 0x0090707f
debug1: Reading configuration data /etc/ssh_config
debug1: Rhosts Authentication disabled, originating port will not be trusted.
debug1: Connecting to 10.n.n.n [10.n.n.n] port 22.
debug1: Connection established.
debug1: identity file /Users/localuserid/.ssh/identity type -1
debug1: identity file /Users/localuserid/.ssh/id_rsa type -1
debug1: identity file /Users/localuserid/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.2
debug1: match: OpenSSH_4.2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.6.1p1+CAN-2004-0175
debug1: An invalid name was supplied
Cannot determine realm for numeric host address

debug1: An invalid name was supplied
A parameter was malformed
Validation error

debug1: An invalid name was supplied
Cannot determine realm for numeric host address

debug1: An invalid name was supplied
A parameter was malformed
Validation error

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 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 '10.n.n.n' is known and matches the RSA host key.
debug1: Found key in /Users/localuserid/.ssh/known_hosts:5
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /Users/localuserid/.ssh/identity
debug1: Trying private key: /Users/localuserid/.ssh/id_rsa
debug1: Trying private key: /Users/localuserid/.ssh/id_dsa
debug1: Next authentication method: keyboard-interactive
Password:
debug1: Authentication succeeded (keyboard-interactive).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: channel 0: request pty-req
debug1: channel 0: request shell
debug1: channel 0: open confirm rwindow 0 rmax 32768
Last login: Mon Oct 10 09:56:58 2005 from 10.y.y.y

USERID@server ~ $ echo $DISPLAY

USERID@server ~ $ 

-- 
Todd H.
http://www.toddh.net/

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