Mailinglist Archive: opensuse (2912 mails)

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Re: [SLE] SSH server login delayed
  • From: "Doug Currey" <doug@xxxxxxxxxxxxxxxxx>
  • Date: Tue, 22 Feb 2005 18:53:02 -0500
  • Message-id: <20050222235138.M1022@xxxxxxxxxxxxxxxxx>
On Tue, 22 Feb 2005 17:59:29 -0500, Benjamin Hornberger wrote
> At 03:11 PM 2/22/2005 -0600, Sunny wrote:
> >On Tue, 22 Feb 2005 16:03:02 -0500, Benjamin Hornberger <bho@xxxxxxx>
wrote:
> > > Hi all,
> > >
> > > I hope somebody can help me with the following problem -- sorry for
the
> > > lengthy explanation.
> > >
> > > I have a machine running SUSE 9.2 Pro in a large research lab. It has
a
> > > unique IP address, but is not directly accessible from the outside
world
> > > through the lab's firewall. Instead, the lab offers SSH gateways
(running
> > > Debian 3.1) to which you can log in from outside, and from there you
can
> > > ssh to machines in the lab. This is as much as I know about the lab's
> > > network structure.
> > >
> > > My machine also serves as a gateway between a small private subnet and
the
> > > research lab network.
> > >
> > > Now I have the problem that if I want to log onto my machine from the
lab's
> > > SSH gateway, it takes 30 seconds for the SSH server to respond and
prompt
> > > for the password, which is quite annoying. If I log on from the
private
> > > subnet, I get the password prompt immediately. If I log on from inside
the
> > > lab's network, I get the immediate response as well. If I ping my
machine
> > > from the SSH gateway, I get an immediate response. If I try to log
onto a
> > > different Linux machine inside the lab's network from the SSH gateway
> > > (Redhat 7.3), I get an immediate response. So it looks like it's
something
> > > between my machine's SSH server and the SSH gateway's SSH client.
> > >
> > > The problem is independent of the machine's firewall settings (the
same
> > > with the SUSE firewall on or off).
> > >
> > > One hint might be that: If I log onto any other Linux machine from my
> > > Windows laptop (SSH Secure Shell 3.2.9), I get a popup window with a
prompt
> > > saying "Enter Password". I type my password, and I'm there. For that
SUSE
> > > machine though, I get a popup saying "Enter your authentication
response"
> > > and a password field. I enter the password, and then another window
pops up
> > > again saying "Enter your authentication response", and OK and cancel
> > > buttons. I first have to click OK, then I'm logged on. So maybe the
server
> > > expects a different authentication mechanism and falls back to
password
> > > after a while? But why does the login go quickly then from any machine
> > > other than the SSH gateway?
> > >
> > > Any help is greatly appreciated! Thanks,
> > >
> > > Benjamin
> > >
> > > --
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> > > Also check the archives at http://lists.suse.com
> > > Please read the FAQs: suse-linux-e-faq@xxxxxxxx
> > >
> > >
> >
> >Check SuSE machines /etc/ssh/sshd_config file for entry "Protocol".
> >Most probably it is set to something like 2,1, which means that first
> >it tries version 2 of the protocol, and then ver. 1. Check
> >/ect/ssh/ssh_config (note, not sshd_config) on the gateway for the
> >same setting. There it may be set to 1,2, so it tries first to
> >negotiate ver.1, and if fails, ver.2
> >Most probably this have to be the problem.
>
> Unfortunately, this didn't help. Any more hints?
>
> Thanks,
> Benjamin
>
I think I had a similar problem. If memory serves it was do to the reverse
dns not resolving correctly.




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