Hi all. I have an odd issue - a particular device is apparently ignoring apparently legal DNS responses. The only differences I can see between the responses that do work and the responses that don't work are that in the responses that don't work:
a) the case of the response has been folded to lower case b) the response includes an additional servers section Here are two samples. The first fails, and was obtained by querying a MikroTik embedded caching server. The second works, and was obtained by querying a BIND caching server. If we tell the device to query the embedded server, it ignores the responses; if we tell the device to query the BIND server, it works. I guess I just want to know if the embedded server is doing anything wrong in folding the case down, or if the other device is doing something wrong by not accepting the folded response. Regards, K. kauer@karl:~/pcaps$ dig @192.168.1.1 pioneer.vTuner.com ; <<>> DiG 9.8.1-P1 <<>> @192.168.1.1 pioneer.vTuner.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16432 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 7, ADDITIONAL: 7 ;; QUESTION SECTION: ;pioneer.vtuner.com. IN A ;; ANSWER SECTION: pioneer.vtuner.com. 1800 IN CNAME primary8.vtuner.com. primary8.vtuner.com. 1800 IN A 173.193.193.67 ;; AUTHORITY SECTION: vtuner.com. 8745 IN NS ns1.securityspace.com. vtuner.com. 8745 IN NS ns1.dnsmadeeasy.com. vtuner.com. 8745 IN NS ns2.securityspace.com. vtuner.com. 8745 IN NS ns0.dnsmadeeasy.com. vtuner.com. 8745 IN NS ns4.dnsmadeeasy.com. vtuner.com. 8745 IN NS ns2.dnsmadeeasy.com. vtuner.com. 8745 IN NS ns3.dnsmadeeasy.com. ;; ADDITIONAL SECTION: ns1.securityspace.com. 154 IN A 67.19.79.219 ns1.dnsmadeeasy.com. 4002 IN A 208.80.124.2 ns2.securityspace.com. 154 IN A 66.36.230.78 ns0.dnsmadeeasy.com. 10840 IN A 208.94.148.2 ns4.dnsmadeeasy.com. 692 IN A 208.80.127.2 ns2.dnsmadeeasy.com. 10326 IN A 208.80.126.2 ns3.dnsmadeeasy.com. 692 IN A 208.80.125.2 ;; Query time: 445 msec ;; SERVER: 192.168.1.1#53(192.168.1.1) ;; WHEN: Mon Aug 12 11:33:20 2013 ;; MSG SIZE rcvd: 339 The second works, and was obtained by querying a BIND caching server: kauer@karl:~/pcaps$ dig @192.168.1.35 pioneer.vTuner.com ; <<>> DiG 9.8.1-P1 <<>> @192.168.1.35 pioneer.vTuner.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12903 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 7, ADDITIONAL: 0 ;; QUESTION SECTION: ;pioneer.vTuner.com. IN A ;; ANSWER SECTION: pioneer.vTuner.com. 1800 IN CNAME primary8.vTuner.com. primary8.vTuner.com. 1800 IN A 173.193.193.67 ;; AUTHORITY SECTION: vTuner.com. 83375 IN NS ns0.dnsmadeeasy.com. vTuner.com. 83375 IN NS ns1.dnsmadeeasy.com. vTuner.com. 83375 IN NS ns1.securityspace.com. vTuner.com. 83375 IN NS ns2.dnsmadeeasy.com. vTuner.com. 83375 IN NS ns2.securityspace.com. vTuner.com. 83375 IN NS ns3.dnsmadeeasy.com. vTuner.com. 83375 IN NS ns4.dnsmadeeasy.com. ;; Query time: 2477 msec ;; SERVER: 192.168.1.35#53(192.168.1.35) ;; WHEN: Mon Aug 12 11:36:02 2013 ;; MSG SIZE rcvd: 227 -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Karl Auer (ka...@biplane.com.au) http://www.biplane.com.au/kauer http://twitter.com/kauer389 GPG fingerprint: B862 FB15 FE96 4961 BC62 1A40 6239 1208 9865 5F9A Old fingerprint: AE1D 4868 6420 AD9A A698 5251 1699 7B78 4EEE 6017 _______________________________________________ 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
