[CentOS] Delay in SSH login..

siva m tech.sivam at gmail.com
Mon Apr 3 23:47:48 UTC 2006


Hi,
    Thanks for your reply. I just included 'VerifyreverseMapping No' inside
/etc/ssh/sshd_config and when I tried to restart the sshd it says :
=========================================
Starting sshd:/etc/ssh/sshd_config line 63: Deprecated option
VerifyreverseMapping
=========================================
 Can you please advice what is the correct way to disable it.

thanks
Lin

On 4/3/06, Jim Perrin <jperrin at gmail.com> wrote:
>
> On 4/3/06, siva m <tech.sivam at gmail.com> wrote:
> > Hi,
> > I have CentOS 4.3 running on my AMD Athlon XP(32 bit) PC and Windows
> 2000
> > running on my other Intel P3 PC(These 2 PCs are connected using a
> network
> > switch). Basically I use the one running Linux as back end server and
> > everything was fine so far. But recently I am experiencing some delay in
> > loggin in to CentOS through SSH.
> >
> > The Putty client which I use generally opens up asking for username
> > prompt(no delay in that) but after entering the password it takes
> atleast
> > 10-15 seconds gap before I logged in.
> > It was fine before and I am sure I didn't made any changes to linux
> > configuration. Can anyone please help me with this issue.
> >
> > By the way I always use the IP address like($ ssh user at 192.168.0.xxxwithout
> > any hostname)
>
> This is where ssh is doing a reverse DNS lookup, which is failing and
> timing out. Set up DNS , or turn off the reverse lookup check in the
> sshd config. Of the two, setting up DNS is the best option, but
> involves a bit more work.
>
> --
> Any sufficiently advanced technology is indistinguishable from magic.
> -Arthur C. Clarke
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