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Full Discussion: Slow login via SSH
Operating Systems Solaris Slow login via SSH Post 302450185 by MikeKulls on Thursday 2nd of September 2010 12:46:33 AM
Old 09-02-2010
Slow login via SSH
Hi Guys and Girls, I know this is a common question but I've searched and we've tried the suggestions without luck. When I log into the box via SSH from a windows machine I get a 1 min 20 sec delay. If we add my IP address and machine name to /etc/hosts then I get an instant login. I would be happy with that as a solution except that it appears my IP keeps changing. Most of the posts I've looked at suggest this is a DNS issue which seems to fit as this machine times out if I type "nslookup bob" where on another server this returns instantly with an error. The timeout is 20 seconds which would indicate that when I log in it attempts to do 4 dns lookups?

I'm guessing the answer to this is fix the dns issue but that's not likely that easy. I don't know how this machine is connected to the network or even where in Australia the machine is located. It's a lab machine so likely doesn't have much access to anything. Assuming it can't reach a dns server can I work around this somehow? I found a post suggesting we put "UseDNS no" in /etc/ssh/sshd_config but this didn't help for some reason.

Thanks,
Michael
 

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LEARN ABOUT DEBIAN

secsh

SECSH(5)							    Lsh Manuals 							  SECSH(5)

NAME

       secsh - the Secure Shell protocol

DESCRIPTION

       secsh  is  a  protocol suite for secure remote login and other secure network services over an insecure network. It is outlined in [SECSH].
       It has three major components:

       The Transport layer protocol
	      This protocol, specified in [SECSH-TLP], provides  server  authentication,  confidentiality,  and  integrity  with  perfect  forward
	      secrecy.

       The User authentication protocol
	      This protocol, specified in [SECSH-AUTH], is used to authenticate a client to a server.

       The Connection protocol
	      This protocol, specified in [SECSH-CONN], multiplexes an encrypted tunnel into several logical channels.

IMPLEMENTATIONS

       Several implementations of the secsh protocol suite exist.

       The SSH2 product of SSH Communications Security Ltd., Finland <URL:http://www.ssh.fi> was the first. The secsh protocol suite has benefited
       a lot from their experience with their older SSH1 product, which is still in widespread use; it implements an older protocol ([SSH1]).

       The lsh suite of programs is a free implementation of the secsh protocol suite; it is distributed under the GNU General Public License.

REFERENCES

       [SECSH-ARCH] T. Ylonen, T. Kivinen, M. Saarinen, T. Rinne and S. Lehtinen, SSH Protocol Architecture, Internet draft, 6 August 1998

       [SECSH-TRANS] T. Ylonen, T. Kivinen, M. Saarinen, T. Rinne and S. Lehtinen, SSH Transport Layer Protocol, Internet draft, 6 August 1998

       [SECSH-AUTH] T. Ylonen, T. Kivinen, M. Saarinen, T. Rinne and S. Lehtinen, SSH Authentication Protocol, Internet draft, 6 August 1998

       [SECSH-CONN] T. Ylonen, T. Kivinen, M. Saarinen, T. Rinne and S. Lehtinen SSH Connection Protocol, Internet draft, 6 August 1998

       [SSH1] T. Ylonen, The SSH (Secure Shell) Remote Login Protocol, Internet draft (expired), 15 November 1995

TRADEMARKS

       SSH and Secure Shell are trademarks or registered trademarks of SSH Communications Security Ltd.

AUTHOR

       This man-page was written by J.H.M. Dassen (Ray) <jdassen@wi.LeidenUniv.nl>.

SEE ALSO

       lsh(1), lshd(8), ssh2(1), sshd2(8), ssh1(1), sshd1(8)

LSH
								   JANUARY 1999 							  SECSH(5)
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