Re: SSH Hangs

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To: secureshell@securityfocus.com, Baveystock.John@swm.de
Date: Thu, 08 Sep 2005 01:54:48 -0700

Greetings,

Without knowing the topology of your working setup OR your non-working
setup, it is nearly impossible to try and deduce what the problem could
be with your second set of workstations.

You say snoop sees an outbound ssh attempt from the source
workstation.... I'm assuming you saw this using snoop on the source
workstation itself ? If so, this leaves EVERY SINGLE PORTION of the
transit path at every single Layer1-Layer7 as a possible suspect.

Silly question but not a given reading your mail...... is the
workstation that's sending the request actually getting the ethernet
frames on the wire ? Could be an outbound IP Filter, Lack of IP route to
host, NIC driver, NIC, Jack, Cable, Switch port, Switch fabric, - then
run that same list in reverse for the receiving workstation's LAN. If
they're not on the same switch then the possibilities become
ridiculously large.

So, for now, can you verify the second ssh client workstation is on the
wire, period ? IP connectivity (icmp echo/reply, other applications,
etc.) are working ? If so, time to check filters both outbound and
inbound. Further, if murphy is totally having his way with you, it could
be a transmission medium error that only errors out when payloads
specific to ssh SYN packets from solaris cause a specific bug-inducing
pattern or voltage on the wire.

So yeah, need a lil' more info ;)

Jayson

On Wed, 2005-09-07 at 16:01 +0200, Baveystock.John@swm.de wrote:
> Hello,
>
> I have installed openssh (the compiled version from sunfreeware.com) on 4 Solaris 8 workstations.
> The hardware is identical as is the Solaris 8 installation and configuration.
>
> The installed pagages are:
> libgcc-3.3-sol8-sparc-local
> openssh-4.1p1-sol8-sparc-local
> openssl-0.9.7g-sol8-sparc-local
> pkgadd -d zlib-1.2.3-sol8-sparc-local
>
> In the path is /usr/local/bin and /usr/local/sbin.
>
> On 2 workstations the command "ssh -l user host-name" produces a password prompt resulting in a correct login.
>
> On the other 2 workstations the command "ssh -l user host-name" hangs. A snoop shows that the ssh request leaves the Sun workstation, but the Sun does not receive a reply.
>
> Has anybody any ideas why 2 workstaions do not work?
>
> John Baveystock
> SWM Services Energie und Wasser GmbH
> Netzwerkmanagement - S-IP-TK-KS
> Emmy-Noether Str. 2, Zi. C0.80
> 80287 München
> Tel.: 089/2361-4350
> Mobil: 0172/8223043
> Fax: 089/2361-2998
> E-mail: baveystock.john@swm.de
>

• Previous message: Frank Wang: "Re: file transfer size limit"
• In reply to: Baveystock.John_at_swm.de: "SSH Hangs"
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