Re: SSH takes ages to authorise
On Wed, 27 Jun 2001, Greg Rowe wrote:
> I saw this same problem as well. It is as you suspected, DNS. Since I
> had a name server on my masqed network I just created a reverse zone and
> all was well. There must be a way to prevent ssh from doing reverse
> lookups but I don't know what that option is...
make sure ReverseMappingCheck is set to no in /etc/ssh/sshd_config
cheers
dc
>
> On Wed, 27 Jun 2001, Nik Makepeace wrote:
>
> > When I connect to my Debian potato machine using ssh (via Putty) protocol 1
> > or 2, after I have entered the correct password, it takes ages (about 10
> > seconds, although sometimes much more) to complete the authorisation process.
> >
> > Looking at top while this is happening shows sshd using about 2% for the
> > duration.
> >
> > Using Putty top connect to my other Debian (woody) box results in a near
> > instantaneous connection, and using this woody machine to ssh to the potato
> > machine results in a near instantaneous connection:
> >
> > Windows -> potato : slow
> > Windows -> woody : fast
> > woody -> potato : fast
> > potato -> woody : fast
> >
> > I suspect it might be a DNS lookup thing; my windows machine is masq'd by
> > the potato machine. Perhaps it is trying to do a reverse lookup on
> > 192.168.1.2?
> >
> > Any suggestions appreciated - 10 seconds is not so long to wait for a
> > login, but it can feel like eternity!
> >
> > Nik
> >
> >
> >
>
> --
> Greg Rowe
> Paranoia is a virtue.
> http://www.therowes.net
>
>
> --
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>
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