[Dnsmasq-discuss] Mac client constant reverse query on itself

B. Cook bcook at poughkeepsieschools.org
Thu Feb 26 14:17:33 GMT 2009


Bob Davis wrote:
> Looks like I had a formatting problem on my previous post.  Let's try this again.
> 
> I'm running 2.46 on Tomato serving up DNS and DHCP to a mix of PC's, NAS's and a Mac.  Everything is working great but I'm puzzled by the behavior of the Mac client (10.5.6).  Every 10-15 seconds the Mac performs a reverse DNS query on it's own address.  As far as I can tell, DNSMASQ seems to reply correctly with the host name but then 15 seconds later it queries again.  Not sure if this has to to with Bonjour or not.  IPV6 is turned off on the Mac.  Here's a copy of the parameters to DNSMASQ:
>  
> dhcp-authoritative
> bogus-priv
> all-servers
> filterwin2k
> domain-needed
> domain=localhost
> cache-size=8192
> log-dhcp
> log-queries
> log-async
> log-facility=/var/log/dnsmasq
>  
> Here's what the log entries look like:
>  
> Feb 23 21:17:11 dnsmasq[1724]: query[PTR] 101.0.168.192.in-addr.arpa from 192.168.0.101
> Feb 23 21:17:11 dnsmasq[1724]: DHCP 192.168.0.101 is iMac1.localhost
> Feb 23 21:17:24 dnsmasq[1724]: query[PTR] 101.0.168.192.in-addr.arpa from 192.168.0.101
> Feb 23 21:17:24 dnsmasq[1724]: DHCP 192.168.0.101 is iMac1.localhost
> Feb 23 21:17:36 dnsmasq[1724]: query[PTR] 101.0.168.192.in-addr.arpa from 192.168.0.101
> Feb 23 21:17:36 dnsmasq[1724]: DHCP 192.168.0.101 is iMac1.localhost
> Feb 23 21:17:48 dnsmasq[1724]: query[PTR] 101.0.168.192.in-addr.arpa from 192.168.0.101
> Feb 23 21:17:48 dnsmasq[1724]: DHCP 192.168.0.101 is iMac1.localhost
> Feb 23 21:18:01 dnsmasq[1724]: query[PTR] 101.0.168.192.in-addr.arpa from 192.168.0.101
> Feb 23 21:18:01 dnsmasq[1724]: DHCP 192.168.0.101 is iMac1.localhost
> Feb 23 21:18:14 dnsmasq[1724]: query[PTR] 101.0.168.192.in-addr.arpa from 192.168.0.101
> Feb 23 21:18:14 dnsmasq[1724]: DHCP 192.168.0.101 is iMac1.localhost
> Feb 23 21:18:26 dnsmasq[1724]: query[PTR] 101.0.168.192.in-addr.arpa from 192.168.0.101
> Feb 23 21:18:26 dnsmasq[1724]: DHCP 192.168.0.101 is iMac1.localhost
> Feb 23 21:18:38 dnsmasq[1724]: query[PTR] 101.0.168.192.in-addr.arpa from 192.168.0.101
> Feb 23 21:18:38 dnsmasq[1724]: DHCP 192.168.0.101 is iMac1.localhost
>  
> The Mac is configured as "iMac1" both in the DNS section of the advanced networking settings as well as in the sharing settings section.  Again, everything seems to work but it would be great to understand this and fix this.
>  
> Thanks,
>  
> bluecar
> 
> _______________________________________________
> Dnsmasq-discuss mailing list
> Dnsmasq-discuss at lists.thekelleys.org.uk
> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss

Morning,

I reported something like this some time ago as well; no one seemed to 
care then either ;)

Feb 26 08:30:18 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
199.10.168.192.in-addr.arpa from 192.168.10.198
Feb 26 08:30:18 <local5.debug> bacula dnsmasq[32374]: DHCP 
192.168.10.199 is mbookpro.tcentral.lan
Feb 26 08:30:18 <local5.debug> bacula dnsmasq[32374]: query[A] 
mbookpro.tcentral.lan from 192.168.10.198
Feb 26 08:30:18 <local5.debug> bacula dnsmasq[32374]: DHCP 
mbookpro.tcentral.lan is 192.168.10.199
Feb 26 08:30:18 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
199.10.168.192.in-addr.arpa from 192.168.10.198
Feb 26 08:30:18 <local5.debug> bacula dnsmasq[32374]: DHCP 
192.168.10.199 is mbookpro.tcentral.lan
Feb 26 08:30:18 <local5.debug> bacula dnsmasq[32374]: query[A] 
mbookpro.tcentral.lan from 192.168.10.198
Feb 26 08:30:18 <local5.debug> bacula dnsmasq[32374]: DHCP 
mbookpro.tcentral.lan is 192.168.10.199
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: query[A] 
mbookpro.tcentral.lan from 192.168.10.198
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: DHCP 
mbookpro.tcentral.lan is 192.168.10.199
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: query[AAAA] 
mbookpro.tcentral.lan from 192.168.10.198
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: forwarded 
mbookpro.tcentral.lan to 10.20.0.16
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: query[A] 
mbookpro.tcentral.lan from 192.168.10.198
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: DHCP 
mbookpro.tcentral.lan is 192.168.10.199
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: query[AAAA] 
mbookpro.tcentral.lan from 192.168.10.198
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: forwarded 
mbookpro.tcentral.lan to 10.20.0.16
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
199.10.168.192.in-addr.arpa from 192.168.10.198
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: DHCP 
192.168.10.199 is mbookpro.tcentral.lan
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: query[A] 
mbookpro.tcentral.lan from 192.168.10.198
Feb 26 08:30:20 <local5.debug> bacula dnsmasq[32374]: DHCP 
mbookpro.tcentral.lan is 192.168.10.199
Feb 26 08:30:31 <local5.debug> bacula dnsmasq[32374]: query[A] 
wingo.tcentral.lan from 192.168.10.134
Feb 26 08:30:31 <local5.debug> bacula dnsmasq[32374]: DHCP 
wingo.tcentral.lan is 192.168.10.134
Feb 26 08:30:32 <local5.debug> bacula dnsmasq[32374]: query[A] 
wingo.tcentral.lan from 192.168.10.134
Feb 26 08:30:32 <local5.debug> bacula dnsmasq[32374]: DHCP 
wingo.tcentral.lan is 192.168.10.134
Feb 26 08:30:34 <local5.debug> bacula dnsmasq[32374]: query[A] 
wingo.tcentral.lan from 192.168.10.134
Feb 26 08:30:34 <local5.debug> bacula dnsmasq[32374]: DHCP 
wingo.tcentral.lan is 192.168.10.134
Feb 26 08:30:34 <local5.debug> bacula dnsmasq[32374]: query[A] 
wingo.tcentral.lan from 192.168.10.134
Feb 26 08:30:34 <local5.debug> bacula dnsmasq[32374]: DHCP 
wingo.tcentral.lan is 192.168.10.134

Wingo is an ubuntu zabbix server, mbookpro is a 10.5 workstation, and 
grannysmith is a 10.5 server

This also comes from the 10.5 laptop (but not the server..)

Feb 26 08:32:44 <local5.debug> bacula dnsmasq[32374]: query[A] 
mail.poughkeepsieschools.org from 192.168.10.199
Feb 26 08:32:44 <local5.debug> bacula dnsmasq[32374]: config 
mail.poughkeepsieschools.org is 10.20.0.2
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
b._dns-sd._udp.0.10.168.192.in-addr.arpa from 192.168.10.199
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: forwarded 
b._dns-sd._udp.0.10.168.192.in-addr.arpa to 10.20.0.16
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
db._dns-sd._udp.0.10.168.192.in-addr.arpa from 192.168.10.199
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: forwarded 
db._dns-sd._udp.0.10.168.192.in-addr.arpa to 10.20.0.16
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
r._dns-sd._udp.0.10.168.192.in-addr.arpa from 192.168.10.199
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: forwarded 
r._dns-sd._udp.0.10.168.192.in-addr.arpa to 10.20.0.16
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
dr._dns-sd._udp.0.10.168.192.in-addr.arpa from 192.168.10.199
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: forwarded 
dr._dns-sd._udp.0.10.168.192.in-addr.arpa to 10.20.0.16
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
lb._dns-sd._udp.0.10.168.192.in-addr.arpa from 192.168.10.199
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: forwarded 
lb._dns-sd._udp.0.10.168.192.in-addr.arpa to 10.20.0.16
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
b._dns-sd._udp.tcentral.lan from 192.168.10.199
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: forwarded 
b._dns-sd._udp.tcentral.lan to 10.20.0.16
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
db._dns-sd._udp.tcentral.lan from 192.168.10.199
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: forwarded 
db._dns-sd._udp.tcentral.lan to 10.20.0.16
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
r._dns-sd._udp.tcentral.lan from 192.168.10.199
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: forwarded 
r._dns-sd._udp.tcentral.lan to 10.20.0.16
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
dr._dns-sd._udp.tcentral.lan from 192.168.10.199
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: forwarded 
dr._dns-sd._udp.tcentral.lan to 10.20.0.16
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: query[PTR] 
lb._dns-sd._udp.tcentral.lan from 192.168.10.199
Feb 26 08:33:07 <local5.debug> bacula dnsmasq[32374]: forwarded 
lb._dns-sd._udp.tcentral.lan to 10.20.0.16

and my ttl is set to 300 so is the negative.

:/






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