Date: Sat, 28 Feb 2009 16:32:47 +1100 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: freebsd-questions@freebsd.org Subject: Odd DNS requests Message-ID: <20090228161606.N71460@sola.nimnet.asn.au>
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Hi, recently we've had a Mac notebook of some sort on our LAN, that likes to make these DNS queries from time to time, to no avail, as noticed on a filtering bridge between the LAN and the router+DNS at 192.168.0.1: 16:13:05.020397 192.168.0.59.53207 > 192.168.0.1.53: 63162+ PTR? b._dns-sd._udp.0.0.168.192.in-addr.arpa. (57) [tos 0x18] 16:13:05.021093 192.168.0.1.53 > 192.168.0.59.53207: 63162 NXDomain* 0/1/0 (128) (DF) 16:13:05.215790 192.168.0.59.64633 > 192.168.0.1.53: 61059+ PTR? db._dns-sd._udp.0.0.168.192.in-addr.arpa. (58) [tos 0x18] 16:13:05.216469 192.168.0.1.53 > 192.168.0.59.64633: 61059 NXDomain* 0/1/0 (129) (DF) 16:13:05.226242 192.168.0.59.61635 > 192.168.0.1.53: 6749+ PTR? r._dns-sd._udp.0.0.168.192.in-addr.arpa. (57) [tos 0x18] 16:13:05.226789 192.168.0.1.53 > 192.168.0.59.61635: 6749 NXDomain* 0/1/0 (128) (DF) 16:13:05.237319 192.168.0.59.56300 > 192.168.0.1.53: 21450+ PTR? dr._dns-sd._udp.0.0.168.192.in-addr.arpa. (58) [tos 0x18] 16:13:05.237842 192.168.0.1.53 > 192.168.0.59.56300: 21450 NXDomain* 0/1/0 (129) (DF) 16:13:05.248440 192.168.0.59.60806 > 192.168.0.1.53: 10032+ PTR? lb._dns-sd._udp.0.0.168.192.in-addr.arpa. (58) [tos 0x18] 16:13:05.249252 192.168.0.1.53 > 192.168.0.59.60806: 10032 NXDomain* 0/1/0 (129) (DF) What exactly are these hoping to discover, and what needs turning off in the Mac's setup (OSX, most likely a recent version) to quell them? cheers, Ian (please cc me, I'm subscribed to the -digest)
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