Apple OS and DNS resolution (._dns-sd.udp. requests)

[Matus UHLAR - fantomas]

Hello,

our customer (an ISP) reported that his clients have problems resolving 
sites like facebook, youtube, aplestores and that the problems only 
affect apple computers.

I notice many requests for dns service discovery:

Apr  5 09:47:20 t03 named[8324]: security: info: client 195.168.157.82#32844: query 'cf._dns-sd._udp.132.110.254.10.in-addr.arpa/TXT/IN' denied
Apr  5 09:47:20 t03 named[8324]: security: info: client 195.168.157.82#49019: query 'cf._dns-sd._udp.132.110.254.10.in-addr.arpa/TXT/IN' denied
Apr  5 09:47:20 t03 named[8324]: security: info: client 195.168.157.82#35647: query 'cf._dns-sd._udp.132.110.254.10.in-addr.arpa/TXT/IN' denied

these requests are denied, because we use private IPS from those ranges 
and I don't want to make them available for users.

Can these requests cause resolving problems on Apple computers?
-- 
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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