Hello there! I'm using the PDNS recursor version 3.7.2 and came across the EDNS draft. Soon as I got time I've decided to see if the recursor would support that feature, since on the config file there is a configuration called disable-edns which is commented, so I suppose that EDNS is supported. Then a ran dig on my recursor and on google recursor and those are the results I got:
dig @myrecursorserver mail.google.com ; <<>> DiG 9.9.4-RedHat-9.9.4-18.el7_1.1 <<>> @myrecursorserver mail.google.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13613 ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;mail.google.com. IN A ;; ANSWER SECTION: mail.google.com. 3589 IN CNAME googlemail.l.google.com. googlemail.l.google.com. 289 IN A 173.194.118.53 googlemail.l.google.com. 289 IN A 173.194.118.54 ;; Query time: 0 msec ;; SERVER: myrecursorserver#53(myrecursorserver) ;; WHEN: Wed Jun 03 09:17:54 BRT 2015 ;; MSG SIZE rcvd: 92 ========================================================================== dig @8.8.8.8 mail.google.com ; <<>> DiG 9.9.4-RedHat-9.9.4-18.el7_1.1 <<>> @8.8.8.8 mail.google.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28324 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;mail.google.com. IN A ;; ANSWER SECTION: mail.google.com. 21599 IN CNAME googlemail.l.google.com. googlemail.l.google.com. 299 IN A 216.58.222.5 ;; Query time: 53 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Wed Jun 03 09:18:10 BRT 2015 ;; MSG SIZE rcvd: 87 As you can see, the google server has an OPT PSEUDOSECTION which my recursor doesn't have. Do I need to configure anything else or maybe I'm missing something ? Or I had the wrong assumption when thinking that the PDNS recursor supports EDNS ? Tiago Ratto [email protected] Friis Telecom +55 (19) 3565-4500 http://www.friistelecom.com.br
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