-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 The default for the qname-minimization option is relaxed, but with that, we cannot resolve the PTR for 142.136.234.134.
dig -x 142.136.234.134 @localhost ; <<>> DiG 9.14.1 <<>> -x 142.136.234.134 @localhost ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 25604 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ; COOKIE: 19827bd99b1c2e4c9b3031d25cc38cd99291547909a1072a (good) ;; QUESTION SECTION: ;134.234.136.142.in-addr.arpa. IN PTR But a dig+trace works: dig -x 142.136.234.134 +trace .... 136.142.in-addr.arpa. 86400 IN NS ns1.twcable.com. 136.142.in-addr.arpa. 86400 IN NS ns2.twcable.com. 136.142.in-addr.arpa. 10800 IN NSEC 137.142.in-addr.arpa. NS RRSIG NSEC 136.142.in-addr.arpa. 10800 IN RRSIG NSEC 5 4 10800 20190510203932 20190426193932 3402 142.in-addr.arpa. VYmReUU/xtnUrJnsiSpl+HUeHfAsbG9YyOMFz9bkvKkY7R/N2MmJbC0j 5eWk+S31Iyqj7tvTxYRXZHWUNLDhr87PeW+5IF0noETb3CRrjX9vC3ef NFyTR0K6Hz7Kd6fmc8qJJj0o9xthqZkdN2ugpoOzFi/AmswNKHo+Spmt GAM= ;; Received 322 bytes from 193.0.9.10#53(arin.authdns.ripe.net) in 138 ms 134.234.136.142.in-addr.arpa. 14400 IN PTR nce.mail.chartercom.com. 234.136.142.in-addr.arpa. 500 IN NS cdp-wn-tm-5-01.inf.twcable.com. ;; Received 135 bytes from 165.237.86.252#53(ns1.twcable.com) in 78 ms If we switch to qname-minimization disabled, we can resolve that: dig -x 142.136.234.134 @localhost ; <<>> DiG 9.14.1 <<>> -x 142.136.234.134 @localhost ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27045 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ; COOKIE: e576889a026393635adb613d5cc38d31b91f6bc06bca426d (good) ;; QUESTION SECTION: ;134.234.136.142.in-addr.arpa. IN PTR ;; ANSWER SECTION: 134.234.136.142.in-addr.arpa. 14400 IN PTR nce.mail.chartercom.com. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (GNU/Linux) iEYEAREKAAYFAlzDjboACgkQL6j7milTFsEhjQCcCRniXDQZhyx/vXKnGplb5Qdw EW8Ani7w4bbl7Eq8nSxFF9fWyu9JKd+T =HJMK -----END PGP SIGNATURE----- _______________________________________________ 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
