Forum - dig reverse ipv6 :: SixXS - IPv6 Deployment & Tunnel Broker

dig reverse ipv6

Shadow Hawkins on Thursday, 28 November 2013 11:31:46

On debian, I can do

# host -t aaaa google.dk google.dk has IPv6 address 2a00:1450:400f:802::1018

Reverse dns:

# host -t ptr 2a00:1450:400f:802::1018 8.1.0.1.0.0.0.0.0.0.0.0.0.0.0.0.2.0.8.0.f.0.0.4.0.5.4.1.0.0.a.2.ip6.arpa domain name pointer arn02s05-in-x18.1e100.net.

But dig cannot make reverse lookup of "colon-adresses":

# dig -t ptr 2a00:1450:400f:802::1018 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 40395 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;2a00:1450:400f:802::101f. IN PTR ;; AUTHORITY SECTION: . 10800 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2013112800 1800 900 604800 86400

One have to tediously use

# dig -t ptr 8.1.0.1.0.0.0.0.0.0.0.0.0.0.0.0.2.0.8.0.f.0.0.4.0.5.4.1.0.0.a.2.ip6.arpa ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36853 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4 ;; QUESTION SECTION: ;8.1.0.1.0.0.0.0.0.0.0.0.0.0.0.0.2.0.8.0.f.0.0.4.0.5.4.1.0.0.a.2.ip6.arpa. IN PTR ;; ANSWER SECTION: 8.1.0.1.0.0.0.0.0.0.0.0.0.0.0.0.2.0.8.0.f.0.0.4.0.5.4.1.0.0.a.2.ip6.arpa. 84888 IN PTR arn02s05-in-x18.1e100.net. ;; AUTHORITY SECTION: 0.5.4.1.0.0.a.2.ip6.arpa. 171288 IN NS ns2.google.com. 0.5.4.1.0.0.a.2.ip6.arpa. 171288 IN NS ns3.google.com. 0.5.4.1.0.0.a.2.ip6.arpa. 171288 IN NS ns1.google.com. 0.5.4.1.0.0.a.2.ip6.arpa. 171288 IN NS ns4.google.com. ;; ADDITIONAL SECTION: ns1.google.com. 87249 IN A 216.239.32.10 ns2.google.com. 87249 IN A 216.239.34.10 ns3.google.com. 87249 IN A 216.239.36.10 ns4.google.com. 87249 IN A 216.239.38.10

Am I missing a trick/option?

dig reverse ipv6

Jeroen Massar SixXS Staff

on Thursday, 28 November 2013 11:40:31

Depends on the version of 'dig', but:

$ dig +short -x 2001:838:1:1:210:dcff:fe20:7c7c ptr noc.sixxs.net.

dig reverse ipv6

Shadow Hawkins on Thursday, 28 November 2013 12:16:34

Nice:

dig +short -x 2001:838:1:1:210:dcff:fe20:7c7c ptr

works for me too.

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