In the "Nameservers" section of the DNS management interface at a hosting provider (webcity.com.au), we see three nameservers for the above domain:
ns1.webcity.com.au (203.17.36.33) ns2.webcity.com.au (203.17.36.4) ns3.webcity.com.au (116.0.23.249) However, when we query the DNS for the nameservers for this domain, we get different answers: kauer@kt:~$ dig +short trubuiltpambula.com.au ns ns1.instanthosting.com.au. ns2.instanthosting.com.au. The two instanthosting nameservers returned have the same IP addresses as ns1.webcity.com.au and ns2.webcity.com.au. And for completeness we checked and there is also an instanthosting A record pointing to the same IP as ns3.webcity.com.au: kauer@kt:~$ dig +short ns3.instanthosting.com.au 116.0.23.249 We also get the two instanthosting nameserver names when we query any of those webcity nameservers directly. For example: kauer@kt:~$ dig +short trubuiltpambula.com.au ns @ns1.webcity.com.au ns1.instanthosting.com.au. ns2.instanthosting.com.au. A trace shows an additional lookup occurring between the website nameservers and the instanthosting nameservers being returned. kauer@kt:~$ dig +trace trubuiltpambula.com.au ns [...] trubuiltpambula.com.au. 900 IN NS ns1.webcity.com.au. trubuiltpambula.com.au. 900 IN NS ns2.webcity.com.au. trubuiltpambula.com.au. 900 IN NS ns3.webcity.com.au. [...] ;; Received 660 bytes from 65.22.197.1#53(r.au) in 51 ms [...] trubuiltpambula.com.au. 43200 IN NS ns2.instanthosting.com.au. trubuiltpambula.com.au. 43200 IN NS ns1.instanthosting.com.au. ;; Received 102 bytes from 203.17.36.4#53(ns2.webcity.com.au) in 30 ms Is there a good explanation for what's happening? Yours mystifiedly, K. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Karl Auer (ka...@biplane.com.au) http://www.biplane.com.au/kauer http://twitter.com/kauer389 GPG fingerprint: 2561 E9EC D868 E73C 8AF1 49CF EE50 4B1D CCA1 5170 Old fingerprint: 8D08 9CAA 649A AFEF E862 062A 2E97 42D4 A2A0 616D _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users