If I do a dig for my RDNS entry on my router's internal interface I get no response. From either the IPv4 or IPv6 address of HE's Recursive DNS server.
; <<>> DiG 9.5.0-P2 <<>> @2001:470:20::2 -x 2001:470:1f11:1bc::
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 41203
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. IN PTR
;; Query time: 87 msec
;; SERVER: 2001:470:20::2#53(2001:470:20::2)
;; WHEN: Sat Aug 29 15:00:35 2009
;; MSG SIZE rcvd: 90
If I do a trace, it works fine. Until the TTL expires and I get no response again.
; <<>> DiG 9.5.0-P2 <<>> @2001:470:20::2 +trace -x 2001:470:1f11:1bc::
; (1 server found)
;; global options: printcmd
. 3599632 IN NS j.root-servers.net.
. 3599632 IN NS h.root-servers.net.
. 3599632 IN NS a.root-servers.net.
. 3599632 IN NS b.root-servers.net.
. 3599632 IN NS g.root-servers.net.
. 3599632 IN NS e.root-servers.net.
. 3599632 IN NS m.root-servers.net.
. 3599632 IN NS f.root-servers.net.
. 3599632 IN NS d.root-servers.net.
. 3599632 IN NS i.root-servers.net.
. 3599632 IN NS l.root-servers.net.
. 3599632 IN NS k.root-servers.net.
. 3599632 IN NS c.root-servers.net.
;; Received 496 bytes from 2001:470:20::2#53(2001:470:20::2) in 64 ms
ip6.arpa. 172800 IN NS SEC1.APNIC.NET.
ip6.arpa. 172800 IN NS TINNIE.ARIN.NET.
ip6.arpa. 172800 IN NS NS2.LACNIC.NET.
ip6.arpa. 172800 IN NS NS.ICANN.ORG.
ip6.arpa. 172800 IN NS NS-SEC.RIPE.NET.
;; Received 221 bytes from 192.33.4.12#53(c.root-servers.net) in 34 ms
0.7.4.0.1.0.0.2.ip6.arpa. 10800 IN NS ns3.he.net.
0.7.4.0.1.0.0.2.ip6.arpa. 10800 IN NS ns1.he.net.
0.7.4.0.1.0.0.2.ip6.arpa. 10800 IN NS ns5.he.net.
0.7.4.0.1.0.0.2.ip6.arpa. 10800 IN NS ns2.he.net.
0.7.4.0.1.0.0.2.ip6.arpa. 10800 IN NS ns4.he.net.
;; Received 186 bytes from 2001:610:240:0:53::4#53(NS-SEC.RIPE.NET) in 160 ms
c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 4900 IN NS xenon.it.cx.
;; Received 115 bytes from 2001:470:400::2#53(ns4.he.net) in 83 ms
0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 60 IN PTR router-sis0.comptech.it.cx.
c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 60 IN NS xenon.it.cx.
;; Received 150 bytes from 2001:470:1f11:1bc:20f:1fff:fe04:8733#53(xenon.it.cx) in 9 ms
Response after the trace.
; <<>> DiG 9.5.0-P2 <<>> @2001:470:20::2 -x 2001:470:1f11:1bc::
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11463
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. IN PTR
;; ANSWER SECTION:
0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 60 IN PTR router-sis0.comptech.it.cx.
;; Query time: 195 msec
;; SERVER: 2001:470:20::2#53(2001:470:20::2)
;; WHEN: Sat Aug 29 15:05:24 2009
;; MSG SIZE rcvd: 130
Any ideas? It used to work correctly until a couple days ago.