Mailinglist Archive: opensuse (2912 mails)

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Re: [SLE] SSH server login delayed
  • From: Josephine <Josephine@xxxxxxxxxx>
  • Date: Wed, 23 Feb 2005 08:32:01 +0100
  • Message-id: <1109143922.5207.3.camel@xxxxxxxxxxxxxxx>
> 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
> > >
> > >
> >
1. enter in your /etc/hosts file from the ssh server the ip and hostname
of the machine you try to connect from (it is a dns lookup issue)
2. enter in etc/ssh/sshd_config at VerifyReverseMapping, no.

Josephine
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