Why is it slow?

[Barry Margolin]

In article <392D2CCF.24C97444 at dnrc.bell-labs.com>,
koancui  <koancui at dnrc.bell-labs.com> wrote:
>Hi,
>I have 2 machines, i configured one of them, such as A, as the
>DNS, run named, set B's NS point to A.
>When i run telnet B on A, there is obvious delay after
>displaying
>---------------------------------------
>Trying xxx.xxx.xxx.xxx...
>Connected to B.
>---------------------------------------
>I had to wait a while here, then got
>---------------------------------------
>Escape character is '^]'
>
>OS
>login:
>---------------------------------------
>
>if i set B's NS point a normal DNS, everything is ok.
>Can you explain it?
>The BIND version is 8.2.2-p5, os is FreeBSD.

There's a problem with reverse DNS on A.  The delay you see is while the
telnet server on B is trying to translate A's address to a name.

Without more details about A's DNS configuration it's hard to pin it down
further.

-- 
Barry Margolin, barmar at genuity.net
Genuity, Burlington, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.