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Old 02-09-2010, 06:24 AM
Tim Long
 
Default Weird DNS issue with a specific web site with Fedora 12 (Temporary failure in name resolution?)

Hi,

I recently upgraded my work computer to Fedora 12 and I am having a
weird DNS issue for an internal website in my organization.

Performing a dig/nslookup for the web site returns a IP address but
trying to contact via a web browser/wget/telnet fails with a DNS error
(the actually web site and IP numbers are scrubbed)
-----
~]$ nslookup www.site.com
Server: ###.###.###.###
Address: ###.###.###.####53

Non-authoritative answer:
Name: www.site.com
Address: ***.***.***.***

~]$ telnet www.site.com 80
telnet: www.site.com: Temporary failure in name resolution
www.site.com: Host name lookup failure
----

Everyone in our organization who has upgraded to Fedora 12 and is
running networking via DHCP has this issue. People with static IP
addresses don't have a problem. This issue seems to be specific to
only this server in the organization and did not occur with earlier
versions of Fedora. Also the nsswitch.conf files are stock standard
and haven't changed.

We have done investigation and the issue might be related to the fact
that our main DNS servers are windows boxes. When we override the DNS
setting and point it at a pirate Unix (read stable!) DNS server in the
problem goes away. Another work around that has been found is to run
dnsmasq on the Fedora workstations. The problem is that these
workarounds is that they the break dynamic DNS system we have to run.

Can anyone offer some help? Even some pointers to where to start
digging/debugging would be helpful because we are all stumped.

Thanks,

Tim Long.

If it helps I have included the full output from dig for reference

Querying the Window DNS server gives something like:

; <<>> DiG 9.6.1-P3-RedHat-9.6.1-16.P3.fc12 <<>> ###.###.###.###
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24111
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;###.###.###.###. IN A

;; ANSWER SECTION:
###.###.###.###. 11 IN A ***.***.***.***

;; Query time: 0 msec
;; SERVER: ***.***.***.***#53(***.***.***.***)
;; WHEN: Tue Feb 9 17:27:18 2010
;; MSG SIZE rcvd: 48


Querying the pirate DNS server returns:

; <<>> DiG 9.6.1-P3-RedHat-9.6.1-16.P3.fc12 <<>> @134.178.6.5 ###.###.###.###
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54136
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;###.###.###.###. IN A

;; ANSWER SECTION:
###.###.###.###. 9 IN A ***.***.***.***

;; AUTHORITY SECTION:
###.###.###.###. 600 IN NS ***.***.***.***.
###.###.###.###. 600 IN NS ***.***.***.***.

;; ADDITIONAL SECTION:
###.###.###.###. 600 IN A ***.***.***.***
###.###.###.###. 600 IN A ***.***.***.***

;; Query time: 1 msec
;; SERVER: ***.***.***.***#53(***.***.***.***)
;; WHEN: Tue Feb 9 17:39:11 2010
;; MSG SIZE rcvd: 136
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