[Unbound-users] multicast address alerts in logs

[Florian Weimer]

* Phil Mayers:

>> Jan 18 11:07:15 rcn-b3s5-01 unbound: [3856:0] notice: sendto failed:
>> Invalid argument
>> Jan 18 11:07:15 rcn-b3s5-01 unbound: [3856:0] notice: remote address is
>> 244.254.254.254 port 53

> Maybe someone has some bad glue?

This is the most likely culprit:

; <<>> DiG 9.6-ESV-R3 <<>> +dnssec +norecurse @ns2.sosdg.org. exemptions.ahbl.org.
; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39796
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 3

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 2800
;; QUESTION SECTION:
;exemptions.ahbl.org.           IN      A

;; AUTHORITY SECTION:
exemptions.ahbl.org.    3628800 IN      NS      invalid.ahbl.org.
exemptions.ahbl.org.    3628800 IN      NS      localhost.ahbl.org.

;; ADDITIONAL SECTION:
invalid.ahbl.org.       3628800 IN      A       244.254.254.254
localhost.ahbl.org.     3600    IN      A       127.0.0.1

;; Query time: 173 msec
;; SERVER: 66.113.102.6#53(66.113.102.6)
;; WHEN: Mon Mar 21 09:43:35 2011
;; MSG SIZE  rcvd: 126

-- 
Florian Weimer                <fweimer at bfk.de>
BFK edv-consulting GmbH       http://www.bfk.de/
Kriegsstraße 100              tel: +49-721-96201-1
D-76133 Karlsruhe             fax: +49-721-96201-99