Quoting Leen Besselink <[email protected]>: > On Tue, Feb 17, 2009 at 01:20:59AM -0500, Paul Wouters wrote: > > On Mon, 16 Feb 2009, krishna e bera wrote: > > > > > > Anyone able to lookup austereo.castmetrix.net? > > > > > > > > I tried using the resolvers running Unbound but keep getting > NXDOMAIN. > > > > resolvers running BIND however returns the following: > > > > I got ServFail. > > > > it first gets the CNAME: > > > > austereo.castmetrix.net is an alias for austereo.castmetrixcdn.net. > > > > > > Seems there is only 1 NS for castmetrixcdn.net, which is > > ns1.castmetrixcdn.com. There is only one NS for castmetrixcdn.com, > > which is ns1.castmetrixcdn.com.. So glue is needed from .com. > > > > ..com lists 2 NS records (ns1.castmetrixcdn.com. and > ns2.castmetrixcdn.com, > > both resolving to 76.74.248.77, which is the recursive nameserver. > unbound > > drops the second NS because the glue is bad, the child zone gives > NXDOMAIN. > >
Thanks Paul, I didn't notice the castmetrixcdn.COM part. > > unbound does get there: > > > > [1234850471] libunbound[14359:0] info: response for > <ns2.castmetrixcdn.com. A IN> > > [1234850471] libunbound[14359:0] info: reply from <castmetrixcdn.com.> > 76.74.248.77#53 > > [1234850471] libunbound[14359:0] info: query response was ANSWER > > > > But if you try to get an answer from there: > > > > dig -t ns +norecurse austereo.castmetrix.net @76.74.248.77 > > That's right, there's no NS records for austereo.castmetrix.net from what I gather. > > ;; QUESTION SECTION: > > ;austereo.castmetrix.net. IN NS > > > > ;; AUTHORITY SECTION: > > castmetrix.net. 3600 IN SOA castmetrix.net. > ns1.castmetrix.com.castmetrix.net. 2008031101 86400 3600 86400 3600 > > > > It does not know the answer. I am not sure where bind picked up the > > answer (mine does the same, it did find it) > > > > PowerDNS-recursor (3.1.8pre with EDNS-ping) also works (with a second > try after clearing the cache, but see below). > > I don't have a bind setup here to test, the Unbound (1.2.0) I have > running did give the right results. > > Although I have found running: dig +trace austereo.castmetrix.net. > several times gives > different results (and dig is from ISC, so possible works like bind was > intended or > something). > > I had a look at a few pcap dumps I make, but I didn't see right away > what the problem > was. I assume the .net-TLD-nameservers might be running different > versions/implementations > and deal differently with the intended NS-/glue-records for the domain > ? > > ;; Received 501 bytes from 2001:7fd::1#53(k.root-servers.net) in 22 ms > > castmetrixcdn.net. 172800 IN NS ns1.castmetrixcdn.com. > castmetrixcdn.net. 172800 IN NS ns2.castmetrixcdn.com. > ;; Received 129 bytes from 192.54.112.30#53(h.gtld-servers.net) in 20 > ms > > dig: couldn't get address for 'ns2.castmetrixcdn.com': not found > __ > > ;; Received 497 bytes from 192.36.148.17#53(i.root-servers.net) in 30 > ms > > castmetrixcdn.net. 172800 IN NS ns1.castmetrixcdn.com. > castmetrixcdn.net. 172800 IN NS ns2.castmetrixcdn.com. > ;; Received 129 bytes from 192.12.94.30#53(E.GTLD-SERVERS.net) in 142 > ms > > austereo.castmetrixcdn.net. 3600 IN A 66.186.45.186 > austereo.castmetrixcdn.net. 3600 IN A 209.11.241.178 > austereo.castmetrixcdn.net. 3600 IN A 66.186.49.74 > austereo.castmetrixcdn.net. 3600 IN A 209.11.243.122 > castmetrixcdn.net. 3600 IN NS ns1.castmetrixcdn.com. > ;; Received 197 bytes from 76.74.248.77#53(ns1.castmetrixcdn.com) in 158 > ms > > ;; Received 129 bytes from 192.31.80.30#53(D.GTLD-SERVERS.net) in 117 > ms > > austereo.castmetrixcdn.net. 3600 IN A 209.11.241.178 > austereo.castmetrixcdn.net. 3600 IN A 66.186.49.74 > austereo.castmetrixcdn.net. 3600 IN A 209.11.243.122 > austereo.castmetrixcdn.net. 3600 IN A 66.186.45.186 > castmetrixcdn.net. 3600 IN NS ns1.castmetrixcdn.com. > ;; Received 197 bytes from 76.74.248.77#53(ns1.castmetrixcdn.com) in 158 > ms > > __ > > ;; Received 501 bytes from 2001:500:1::803f:235#53(h.root-servers.net) > in 238 ms > > castmetrixcdn.net. 172800 IN NS ns1.castmetrixcdn.com. > castmetrixcdn.net. 172800 IN NS ns2.castmetrixcdn.com. > ;; Received 129 bytes from 2001:503:231d::2:30#53(b.gtld-servers.net) in > 118 ms > > austereo.castmetrixcdn.net. 3600 IN A 66.186.45.186 > austereo.castmetrixcdn.net. 3600 IN A 209.11.241.178 > austereo.castmetrixcdn.net. 3600 IN A 66.186.49.74 > austereo.castmetrixcdn.net. 3600 IN A 209.11.243.122 > castmetrixcdn.net. 3600 IN NS ns1.castmetrixcdn.com. > ;; Received 197 bytes from 76.74.248.77#53(ns1.castmetrixcdn.com) in 157 > ms > > __ > > ;; Received 501 bytes from 2001:dc3::35#53(m.root-servers.net) in 172 > ms > > castmetrixcdn.net. 172800 IN NS ns1.castmetrixcdn.com. > castmetrixcdn.net. 172800 IN NS ns2.castmetrixcdn.com. > ;; Received 129 bytes from 2001:503:a83e::2:30#53(A.GTLD-SERVERS.net) in > 302 ms > > austereo.castmetrixcdn.net. 3600 IN A 209.11.243.122 > austereo.castmetrixcdn.net. 3600 IN A 66.186.45.186 > austereo.castmetrixcdn.net. 3600 IN A 209.11.241.178 > austereo.castmetrixcdn.net. 3600 IN A 66.186.49.74 > castmetrixcdn.net. 3600 IN NS ns1.castmetrixcdn.com. > ;; Received 197 bytes from 76.74.248.77#53(ns1.castmetrixcdn.com) in 156 > ms > > __ > > ;; Received 501 bytes from 2001:500:3::42#53(l.root-servers.net) in 130 > ms > > castmetrixcdn.net. 172800 IN NS ns1.castmetrixcdn.com. > castmetrixcdn.net. 172800 IN NS ns2.castmetrixcdn.com. > ;; Received 129 bytes from 192.26.92.30#53(c.gtld-servers.net) in 120 > ms > > dig: couldn't get address for 'ns2.castmetrixcdn.com': not found > > __ > > ;; Received 497 bytes from 2001:503:c27::2:30#53(j.root-servers.net) in > 101 ms > > castmetrixcdn.net. 172800 IN NS ns1.castmetrixcdn.com. > castmetrixcdn.net. 172800 IN NS ns2.castmetrixcdn.com. > ;; Received 129 bytes from 192.35.51.30#53(F.GTLD-SERVERS.net) in 168 > ms > > austereo.castmetrixcdn.net. 3600 IN A 66.186.49.74 > austereo.castmetrixcdn.net. 3600 IN A 209.11.243.122 > austereo.castmetrixcdn.net. 3600 IN A 66.186.45.186 > austereo.castmetrixcdn.net. 3600 IN A 209.11.241.178 > castmetrixcdn.net. 3600 IN NS ns1.castmetrixcdn.com. > ;; Received 197 bytes from 76.74.248.77#53(ns1.castmetrixcdn.com) in 154 > ms > It depends on what NS record gets used. If it's ns2.castmetrixcdn.com, then it fails as shown above. If it's ns1.castmetrixcdn.com, then it resolves. -- Haw Loeung Systems Administrator TPG Internet http://www.tpg.com.au ________________________________________________________________ _______ _______________________________________________ Unbound-users mailing list [email protected] http://unbound.nlnetlabs.nl/mailman/listinfo/unbound-users
