I'm running PowerDNS Recursor 3.7.3 on a pair of Ubuntu 14.04.3 LTS servers. I'm getting intermittent SERVFAIL responses on both servers to queries for a particular name. Could someone please help me understand what might be causing these failures? Here are examples of the SERVFAIL responses I'm seeing on one of the servers:
$ dig @localhost www.concoursmustang.com any ; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>> @localhost www.concoursmustang.com any ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 23134 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.concoursmustang.com. IN ANY ;; Query time: 3004 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Aug 18 09:31:23 EDT 2015 ;; MSG SIZE rcvd: 41 $ dig @localhost www.concoursmustang.com a ; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>> @localhost www.concoursmustang.com a ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 29329 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.concoursmustang.com. IN A ;; Query time: 3003 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Aug 18 09:36:28 EDT 2015 ;; MSG SIZE rcvd: 41 A successful result for a different domain: $ dig @localhost powerdns.com a ; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>> @localhost powerdns.com a ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 53794 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;powerdns.com. IN A ;; ANSWER SECTION: powerdns.com. 40190 IN A 82.94.213.34 ;; Query time: 1 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Aug 18 09:41:27 EDT 2015 ;; MSG SIZE rcvd: 46 Successful queries on the second server: $ dig @localhost www.concoursmustang.com a ; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>> @localhost www.concoursmustang.com a ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40855 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.concoursmustang.com. IN A ;; ANSWER SECTION: www.concoursmustang.com. 14400 IN CNAME concoursmustang.com. concoursmustang.com. 14400 IN A 70.40.195.107 ;; Query time: 64 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Aug 18 09:35:55 EDT 2015 ;; MSG SIZE rcvd: 71 $ dig @localhost www.concoursmustang.com any ; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>> @localhost www.concoursmustang.com any ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6474 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.concoursmustang.com. IN ANY ;; ANSWER SECTION: www.concoursmustang.com. 14385 IN CNAME concoursmustang.com. concoursmustang.com. 40278 IN NS ns2.hostmonster.com. concoursmustang.com. 14385 IN A 70.40.195.107 concoursmustang.com. 40278 IN NS ns1.hostmonster.com. ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue Aug 18 09:36:10 EDT 2015 ;; MSG SIZE rcvd: 119 These servers are configured similarly. Both are configured to accept queries only from machines on my local network. Thanks, Scott _______________________________________________ Pdns-users mailing list [email protected] http://mailman.powerdns.com/mailman/listinfo/pdns-users
