On Tue, Aug 18, 2015 at 10:33:15AM -0400, Scott Hollenbeck wrote: > 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:
Hi Scott, Can you repeat with trace-regex turned on for this domain? Also, asking ANY queries confuses things, could you try 'A' queries? https://doc.powerdns.com/md/recursor/running/ has details on trace-regex. Thanks! Bert > > $ 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 > Pdns-users@mailman.powerdns.com > http://mailman.powerdns.com/mailman/listinfo/pdns-users > _______________________________________________ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users