openssh sshd slow logins
Dave Wang
dave@arubanetworks.com
Mon Jan 3 19:47:00 GMT 2005
hi,
i'm having a problem where my cygwin openssh sshd logins are slow. i am
using rsa key autologins. only a certain portion of the login is
slow.
when i do a "ssh -x <user>@<cygwinmachine>" from my linux box, the
authentication is immediately successful (the motd prints out
immediately), but then it takes about 5 seconds for the shell to
appear.
I know that the shell is not slow in starting up, because in
/etc/passwd
i've replaced the shell with the "date" command , and that takes an
equally slow amount of time to get from the motd to the shell program
execution.
-- i've added the option "UseDNS no" to the sshd_config file, to
avoid
reverse dns lookups.
-- "sshd" is setup as an XP service, with access to the desktop
-- "ssh -vvv user@machine" doesn't show anything wrong. it is
virtually
instantaneous until after printing the motd.
-- rsa key logins to a linux box on the same segment as the windows
give me an instantaneous shell.
the last thread i saw about sshd logins being slow was dated in 2001,
and
those were resolved by disabling the reverse dns lookups (which i've
done).
Any comments are appreciated. Thanks!
-dave
dave at arubanetworks dot com
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