dns timeout?

[Kevin Darcy]

One of the delegated servers for 83.73.66.in-addr.arpa,
ns2.ameritech.net, appears to not be answering queries. Maybe you have a
routing or firewall problem which prevents you from talking to the
working server (or perhaps you can't talk to either of them, in which
case it's irrelevant that ns2 is non-functional).

The reason you get no delay when telnet'ing to port 25 is probably
because your mail server is not configured to do reverse lookups on
connecting clients' addresses.

No, you don't need to reload named when changing the hosts file. named
and the hosts file don't interact with each other.

Then again, maybe the delay has nothing to do with DNS at all. What kind
of logging/debugging does your POP3 server provide?


- Kevin

hagedorr at nttc.org wrote:

> Hi dns groupies
>
> My ISP does not delegate the reverse zone for my handful of IPs.  I'm
> having a problem with POP3 taking forever to say hello.
>
> telnet mail.dnn.cc 25 is quick, where postfix listens, but
> telnet mail.dnn.cc 110 takes 30 seconds.
>
> putting
> 66.73.83.41   mail.dnn.cc   dnn.cc
> in the hosts files didn't change the situation.
> I tried putting the LAN address there, too (why not).
>
> Funny to have to ask, but do I need to reload named if I'm just
> changing the hosts file?
>
> I do have a reverse zone configured, but I supposed it's only looked
> at if my name server is queried (?).  I notice no delay if I telnet
> mail.dnn.cc 110 from the LAN.
>
> I hate to give up on POP3, but I can't get it up to an acceptable
> response time.
>
> Any ideas?
>
> Rick Hagedorn