Maintained by: NLnet Labs

[Unbound-users] Cannot resolve the MX for bk.bund.de using unbound

Ralf Hildebrandt
Wed Dec 12 21:54:48 CET 2012


I cannot see why this doesn't work here on mail.charite.de or
mail2.charite.de:

root at mail2:~# dig @127.0.0.1 -t mx bk.bund.de

; <<>> DiG 9.8.1-P1 <<>> @127.0.0.1 -t mx bk.bund.de
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 59991
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;bk.bund.de. IN MX

;; Query time: 16 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Dec 12 21:52:22 2012
;; MSG SIZE  rcvd: 28

SERVFAIL? But why?

# netstat -tulpen |grep :53
tcp        0      0 127.0.0.1:53            0.0.0.0:* LISTEN      0          8509391     10826/unbound   
tcp6       0      0 ::1:53                  :::*      LISTEN      0          8509389     10826/unbound   
udp        0      0 127.0.0.1:53            0.0.0.0:*        0          8509390     10826/unbound   
udp6       0      0 ::1:53                  :::*             0          8509388     10826/unbound   

# ps auxwww|grep unbound
unbound  10826  0.1  0.6  65516 18856 ?        Ss   20:34   0:07 /usr/sbin/unbound

ii  libunbound2    1.4.16-1                   library implementing DNS resolution and validation
ii  unbound        1.4.16-1                   validating, recursive, caching DNS resolver
ii  unbound-anchor 1.4.16-1                   utility to securely fetch the root DNS trust anchor
		   
# lsb_release -a
No LSB modules are available.
Distributor ID:Ubuntu
Description:Ubuntu 12.04.1 LTS
Release:12.04
Codename:precise

-- 
Ralf Hildebrandt                   Charite Universitätsmedizin Berlin
ralf.hildebrandt at charite.de        Campus Benjamin Franklin
http://www.charite.de              Hindenburgdamm 30, 12203 Berlin
Geschäftsbereich IT, Abt. Netzwerk fon: +49-30-450.570.155