Saludos,
Tengo una duda en cuanto a una recursión. Tengo una ip reversa funcionando correctamente en mi DNS
dig -x 190.241.253.252 @196.40.15.200
; <<>> DiG 9.7.0-P1 <<>> -x 190.241.253.252 @196.40.15.200 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47565 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
;; QUESTION SECTION: ;252.253.241.190.in-addr.arpa. IN PTR
;; ANSWER SECTION: 252.253.241.190.in-addr.arpa. 86400 IN PTR stargate-at.multifrio.com.
;; AUTHORITY SECTION: 253.241.190.in-addr.arpa. 86400 IN NS ns.ct.co.cr. 253.241.190.in-addr.arpa. 86400 IN NS ns2.ct.co.cr.
;; ADDITIONAL SECTION: ns.ct.co.cr. 84200 IN A 196.40.15.200 ns2.ct.co.cr. 84200 IN A 196.40.15.199
;; Query time: 0 msec ;; SERVER: 196.40.15.200#53(196.40.15.200) ;; WHEN: Thu Sep 13 12:45:22 2012 ;; MSG SIZE rcvd: 160
Sin embargo cuando pregunto a un server externo me indica dominio inexistente
dig -x 190.241.253.252 @4.2.2.2
; <<>> DiG 9.7.0-P1 <<>> -x 190.241.253.252 @4.2.2.2 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 13984 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION: ;252.253.241.190.in-addr.arpa. IN PTR
;; AUTHORITY SECTION: 190.in-addr.arpa. 900 IN SOA NS.LACNIC.NET. hostmaster.LACNIC.NET. 2012091311 1800 900 691200 10800
;; Query time: 388 msec ;; SERVER: 4.2.2.2#53(4.2.2.2) ;; WHEN: Thu Sep 13 12:45:57 2012 ;; MSG SIZE rcvd: 106
Observo que responde como autoridad a NS.LACNIC.NET. Al preguntarle directamente a ese DNS me indica un error de recursión.
dig -x 190.241.253.252 @NS.LACNIC.NET
; <<>> DiG 9.7.0-P1 <<>> -x 190.241.253.252 @NS.LACNIC.NET ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 584 ;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; WARNING: recursion requested but not available
;; QUESTION SECTION: ;252.253.241.190.in-addr.arpa. IN PTR
;; AUTHORITY SECTION: 190.in-addr.arpa. 10800 IN SOA NS.LACNIC.NET. hostmaster.LACNIC.NET. 2012091311 1800 900 691200 10800
;; Query time: 168 msec ;; SERVER: 200.3.13.10#53(200.3.13.10) ;; WHEN: Thu Sep 13 12:46:51 2012 ;; MSG SIZE rcvd: 106
El tema que no entiendo es pq no permite la recursión: WARNING: recursion requested but not available
Saludos