On 4/3/06, Jim Perrin <jperrin@gmail.com> wrote:

On 4/3/06, siva m < tech.sivam@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@192.168.0.xxx without
> 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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