LinuxQuestions.org
Register a domain and help support LQ
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Networking
User Name
Password
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.

Notices

Reply
 
Search this Thread
Old 04-30-2002, 10:25 AM   #1
spadesmaster
LQ Newbie
 
Registered: Dec 2001
Posts: 8

Rep: Reputation: 0
Unhappy HELP! Caching DNS server wont resolve .EDU domains?


I need help with our caching DNS server. We are running RedHat Linux 6.1
with most of the updates as of a few months ago. A few days ago our DNS
stopped resolving, mostly to .EDU domains. Emails bounce, pings fail, etc.
Oddly, it seems to resolve internal domains as well as external .COM and
.GOV domains just fine! We havent changed a thing in our DNS, system, or
firewall setup recently. My best guess is that some kind of master DNS
list (named.ca?) for the up-level servers is corrupted. Any ideas what is
wrong and how I can fix it? I included some nslookup and dig output below.

Here is the output of a few nslookups (we are behind a NAT firewall, but the
ports are mapped from an external IP so dont let the 192.168 worry you).

> freehearts.com
Server: ns1.dqsoft.com
Address: 192.168.1.5

Name: freehearts.com
Address: 216.92.98.140

> dq.com
Server: ns1.dqsoft.com
Address: 192.168.1.5

Non-authoritative answer:
Name: dq.com
Address: 216.71.5.180

> yahoo.com
Server: ns1.dqsoft.com
Address: 192.168.1.5

Non-authoritative answer:
Name: yahoo.com
Addresses: 66.218.71.113, 66.218.71.112

> nist.gov
Server: ns1.dqsoft.com
Address: 192.168.1.5

Name: nist.gov
Address: 129.6.13.23

> ncar.edu
Server: ns1.dqsoft.com
Address: 192.168.1.5

*** ns1.dqsoft.com can't find ncar.edu: Non-existent host/domain

DIG OUTPUT:
<dqsoft.com> <118> % dig ncar.edu

; <<>> DiG 8.3 <<>> ncar.edu
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 4
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUERY SECTION:
;; ncar.edu, type = A, class = IN

;; AUTHORITY SECTION:
edu. 2h52m15s IN SOA A.ROOT-SERVERS.NET. NSTLD.VERISIGN-GRS.
COM. (
2002043000 ; serial
30M ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum


;; Total query time: 2 msec
;; FROM: dqsoft.com to SERVER: default -- 192.168.1.5
;; WHEN: Tue Apr 30 08:35:20 2002
;; MSG SIZE sent: 26 rcvd: 102

Blitzkrieg ('tanks in advance),
Christopher
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
DNS Caching Server Itsu Linux - Networking 2 10-06-2004 11:49 PM
Local caching only DNS takes a long time to resolve essdeeay Linux - Networking 4 08-20-2004 11:41 AM
The DNS wont resolve... hpnadig Linux - Networking 3 01-04-2004 02:05 PM
need help to set up caching only dns server to with bogus DNS entries ullas Linux - Networking 1 10-28-2003 01:54 PM
No IP and Caching DNS server fmertus Linux - Networking 2 06-27-2003 12:33 PM


All times are GMT -5. The time now is 03:12 AM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration