[Dnsmasq-discuss] Problem with resolving some names

Ainsley Pereira dnsmasq at pebble.org.uk
Sun Jul 20 21:56:47 BST 2008


Hi,

I have dnsmasq 2.41 running on a wireless access point, and I'm having a
problem with with resolving some names, but not others.
For example:

(From a machine with dnsmasq as its only nameserver in /etc/resolv.conf)
$ dig www.mozilla.org

; <<>> DiG 9.4.2-P1 <<>> www.mozilla.org
;; global options:  printcmd
;; connection timed out; no servers could be reached


$ dig @195.74.113.58 www.mozilla.org

; <<>> DiG 9.4.2-P1 <<>> @195.74.113.58 www.mozilla.org
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11822
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 3, ADDITIONAL: 0

;; QUESTION SECTION:
;www.mozilla.org.               IN      A

;; ANSWER SECTION:
www.mozilla.org.        9       IN      CNAME
www-mozilla-org.geo.mozilla.com.
www-mozilla-org.geo.mozilla.com. 857 IN CNAME
www-mozilla-org.glb.mozilla.com.
www-mozilla-org.glb.mozilla.com. 5 IN   A       63.245.213.14

;; AUTHORITY SECTION:
glb.mozilla.com.        600     IN      NS
ns01.nllb.nl.mozilla.com.
glb.mozilla.com.        600     IN      NS
ns01.nslb.sj.mozilla.com.
glb.mozilla.com.        600     IN      NS
ns01.anycast.mozilla.com.

;; Query time: 37 msec
;; SERVER: 195.74.113.58#53(195.74.113.58)
;; WHEN: Sun Jul 20 21:51:19 2008
;; MSG SIZE  rcvd: 209

On the wireless ap itself, /etc/resolv.conf contains
nameserver 195.74.113.58
nameserver 195.74.113.62

and the dnsmasq.conf is:
dhcp-authoritative
dhcp-range=br0,192.168.44.10,192.168.44.14,255.255.255.0,1440m
dhcp-broadcast=br0
dhcp-option=3,192.168.44.1
dhcp-option=6,192.168.44.1
dhcp-host=00:0e:2e:d6:8b:3b,192.168.44.4
dhcp-host=00:19:c5:f2:9b:20,192.168.44.2
dhcp-host=00:14:0B:23:07:36,192.168.44.3
dhcp-option=119,sunnydale
domain-needed
expand-hosts
domain=sunnydale
log-async=5
log-queries
all-servers
mx-host=pebble.org.uk,snowdrift.snowplains.org,50

(That last line was added because the records returned by dnsmasq didn't
seem to include the MX otherwise, perhaps related to this problem?)

dnsmasq's log from those queries:
Sun, 2008-07-20 20:46:27 - forwarded www.mozilla.org to 195.74.113.58
Sun, 2008-07-20 20:46:27 - forwarded www.mozilla.org to 195.74.113.62
Sun, 2008-07-20 20:46:27 - reply www.mozilla.org is <CNAME>
Sun, 2008-07-20 20:46:27 - reply www-mozilla-org.geo.mozilla.com is
<CNAME>
Sun, 2008-07-20 20:46:27 - reply www-mozilla-org.glb.mozilla.com is
63.245.213.14
Sun, 2008-07-20 20:46:32 - cached www.mozilla.org is <CNAME>
Sun, 2008-07-20 20:46:32 - cached www-mozilla-org.geo.mozilla.com is
<CNAME>
Sun, 2008-07-20 20:46:32 - forwarded www.mozilla.org to 195.74.113.58
Sun, 2008-07-20 20:46:32 - forwarded www.mozilla.org to 195.74.113.62
Sun, 2008-07-20 20:46:32 - reply www.mozilla.org is <CNAME>
Sun, 2008-07-20 20:46:32 - reply www-mozilla-org.geo.mozilla.com is
<CNAME>
Sun, 2008-07-20 20:46:32 - reply www-mozilla-org.glb.mozilla.com is
63.245.213.14
Sun, 2008-07-20 20:46:37 - cached www.mozilla.org is <CNAME>
Sun, 2008-07-20 20:46:37 - cached www-mozilla-org.geo.mozilla.com is
<CNAME>
Sun, 2008-07-20 20:46:37 - forwarded www.mozilla.org to 195.74.113.58
Sun, 2008-07-20 20:46:37 - forwarded www.mozilla.org to 195.74.113.62
Sun, 2008-07-20 20:46:37 - reply www.mozilla.org is <CNAME>
Sun, 2008-07-20 20:46:37 - reply www-mozilla-org.geo.mozilla.com is
<CNAME>
Sun, 2008-07-20 20:46:37 - reply www-mozilla-org.glb.mozilla.com is
63.245.213.12


Upgrading the firmware to the current version of dnsmasq isn't
straightforward, but I will if that's the problem. If I have a
configuration problem that'd be easier to fix though!

Any ideas?

Thanks,
Ainsley



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