always takes exactly 40 seconds to log in via ssh



I have a dedicated server where even when the http server is
responding quickly, it takes 40 seconds to log in via ssh. Moreover,
it always takes EXACTLY 40 seconds to log in.

When it always takes exactly the same amount of time to connect, that
suggests it's not due to the server load; it's due to the server
trying to do some sort of check on me (reverse DNS, maybe? but I have
reverse DNS set up, so that shouldn't take so long) and it takes 40
seconds before that times out and it lets me in anyway.

How do I disable this, so it lets me in right away? I already read
the FAQ at
http://www.employees.org/~satch/ssh/faq/ssh-faq.html
but couldn't find the answer.
.



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