Slow DNS queries
Bob Vance
bobvance at alumni.caltech.edu
Tue Sep 19 12:46:56 UTC 2000
You are running BIND on the Linux NAT box, right?
Have you set up BIND on Linux-NAT to have global (for 8.x) :
options {
...
forwarders {
xxx.yyy.zzz.www ; // a nameserver at the ISP
};
forward only;
...
}
?
Then, when Linux-NAT receives a request for which it's not
authoritative, or doesn't have in its cache, he should forward it to
xxx.yyy.zzz.www for resolution.
The clients should point to Linux-NAT's IP address for name resolution.
What does your client resolver config or nameserver list look like?
What does your Linux-NAT named.conf look like?
-------------------------------------------------
Tks | <mailto:BVance at sbm.com>
BV | <mailto:bobvance at alumni.caltech.edu>
Senior Tech. Consultant, SBM, A Gates/Arrow Co.
Vox 770-623-3430 11455 Lakefield Dr.
Fax 770-623-3429 Duluth, GA 30097-1511
=================================================
-----Original Message-----
From: news at detyp01.mw.mediaone.net
[mailto:news at detyp01.mw.mediaone.net]On Behalf Of Joel Ryan
Sent: Monday, September 18, 2000 10:50 PM
To: comp-protocols-dns-bind at moderators.isc.org
Subject: Slow DNS queries
Hello
I'm running Linux (2.2.14) to do NAT for my internal network. It uses a
cable modem and I get the IP via DHCP.
Why would DNS queries be slow on the internal network (5-10 seconds) and
very fast on the Linux server ( < 1 second)? I've been able to fix this by
entering my ISPs DNS servers on machines in the internal network (the DNS
queries are masqeraded to the Internet) but I don't think that's the best
solution.
Is there a way to simply forward requests directly to my ISP's DNS
servers?
Thanks
-- Joel
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