Maintained by: NLnet Labs

[Unbound-users] Cannot resolve nominum.org: SERVFAIL

W.C.A. Wijngaards
Tue Feb 7 11:35:26 CET 2012


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Hi Stephane,

What version of unbound is this?  (I do not see it fallback to
parent-side of the delegation, but that could also be that verbosity is
not high enough (or syslog dropped lines)).

Nominum's NS set looks OK now, here, although ns2 has 30 second TTL and
differs in parent and child side of the delegation.  The 81.200.68.219
(ns2 parent side) is not working (timeout).  Is there some sort of
nameserver maintenance going on?

Best regards,
   Wouter

On 02/07/2012 11:03 AM, Stephane Bortzmeyer wrote:
> % dig MX nominum.org
> 
> ; <<>> DiG 9.7.3 <<>> MX nominum.org
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 12227
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
> 
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;nominum.org.                   IN      MX
> 
> ;; Query time: 1 msec
> ;; SERVER: ::1#53(::1)
> ;; WHEN: Tue Feb  7 11:01:37 2012
> ;; MSG SIZE  rcvd: 40
> 
> It works for my BIND resolvers. Restarting solved the problem. Log is attached:
> 
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: validator[module 0] operate: extstate:module_state_initial event:module_event_new
> Feb  7 11:01:37 batilda unbound: [17061:0] info: validator operate: query nominum.org. MX IN
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: iterator[module 1] operate: extstate:module_state_initial event:module_event_pass
> Feb  7 11:01:37 batilda unbound: [17061:0] info: resolving nominum.org. MX IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: resolving (init part 2):  nominum.org. MX IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: resolving (init part 3):  nominum.org. MX IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: processQueryTargets: nominum.org. MX IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: new target ns2.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: new target ns1.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: iterator[module 1] operate: extstate:module_state_initial event:module_event_pass
> Feb  7 11:01:37 batilda unbound: [17061:0] info: iterator operate: query ns2.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: resolving ns2.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: resolving (init part 2):  ns2.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: resolving (init part 3):  ns2.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: processQueryTargets: ns2.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: skipping target due to dependency cycle (harden-glue: no may fix some of the cycles) ns2.staff.nominum.org. A IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: new target ns1.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: iterator[module 1] operate: extstate:module_state_initial event:module_event_pass
> Feb  7 11:01:37 batilda unbound: [17061:0] info: iterator operate: query ns1.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: resolving ns1.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: resolving (init part 2):  ns1.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: resolving (init part 3):  ns1.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: processQueryTargets: ns1.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: skipping target due to dependency cycle (harden-glue: no may fix some of the cycles) ns2.staff.nominum.org. A IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: skipping target due to dependency cycle (harden-glue: no may fix some of the cycles) ns1.staff.nominum.org. A IN
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: out of query targets -- returning SERVFAIL
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: return error response SERVFAIL
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: validator[module 0] operate: extstate:module_state_initial event:module_event_moddone
> Feb  7 11:01:37 batilda unbound: [17061:0] info: validator operate: query ns1.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: iterator[module 1] operate: extstate:module_wait_subquery event:module_event_pass
> Feb  7 11:01:37 batilda unbound: [17061:0] info: iterator operate: query ns2.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: processQueryTargets: ns2.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: out of query targets -- returning SERVFAIL
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: return error response SERVFAIL
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: validator[module 0] operate: extstate:module_state_initial event:module_event_moddone
> Feb  7 11:01:37 batilda unbound: [17061:0] info: validator operate: query ns2.staff.nominum.org. AAAA IN
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: iterator[module 1] operate: extstate:module_wait_subquery event:module_event_pass
> Feb  7 11:01:37 batilda unbound: [17061:0] info: iterator operate: query nominum.org. MX IN
> Feb  7 11:01:37 batilda unbound: [17061:0] info: processQueryTargets: nominum.org. MX IN
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: out of query targets -- returning SERVFAIL
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: return error response SERVFAIL
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: validator[module 0] operate: extstate:module_wait_module event:module_event_moddone
> Feb  7 11:01:37 batilda unbound: [17061:0] info: validator operate: query nominum.org. MX IN
> Feb  7 11:01:37 batilda unbound: [17061:0] debug: cache memory msg=2200012 rrset=3674981 infra=1964631 val=530448
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