Optimizing SSH for low speed links

Barndon Daron Daron.Barndon at ga.gov.au
Thu Aug 8 12:29:15 EST 2002

Over a fast link it appears to be ok. If we remove the radio link (but rate limit to 2400b) it is better (but not by much). Machine on one end is a PII 300 - the other is a fully kitted out e420 - so speed on either end shouldnt be much of an issue... Will investigate the entropy though...

-----Original Message-----
From: Brad Hards [mailto:bhards at bigpond.net.au]
Sent: Thursday, 8 August 2002 12:05 PM
To: linux at lists.samba.org
Subject: Re: Optimizing SSH for low speed links

Hash: SHA1

On Thu, 8 Aug 2002 12:00, Sam Couter wrote:
> Ian McCulloch <ianmcc at lorentz.leidenuniv.nl> wrote:
> > I have noticed that initiating an ssh connection on a slow link can take
> > a long time, I guess it depends on which authentication method you use
> Are you sure it's the link that is affecting the connection
> establishment? I have a slow machine at home on a reasonably fast
> network, and each time I establish an SSH connection it takes a while to
> crank out the session key. Once established, it's quite responsive.

If this is a machine without much randomness (eg you don't use the keyboard or 
mouse, because this is probably some data collection device at a remote site, 
right), then maybe that is the problem. Can you try the same configuration on 
a fast link? That would help identify the problem.

One solution might be to get a newer machine that has build in random 
generator, or change the sources of entropy.


- -- 
http://conf.linux.org.au. 22-25Jan2003. Perth, Australia. Birds in Black.
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org


More information about the linux mailing list