[Bug 669751] [NEW] bind listens on 127.0.0.1:53 rather than *:53

[Tim Nicholas]

Public bug reported:

Binary package hint: bind9

Bind appears to be listening on specific addresses rather than on all
interfaces. This wouldn't be a problem except that on modern Ubuntu
systems the local host name is configured in /etc/hosts to by on
127.0.1.1 rather than the same IP as localhost (127.0.1.1).

root at hostname:~# netstat -nlp | grep named
tcp        0      0 192.168.1.71:53         0.0.0.0:*               LISTEN      30752/named     
tcp        0      0 127.0.0.1:53            0.0.0.0:*               LISTEN      30752/named     
tcp        0      0 127.0.0.1:953           0.0.0.0:*               LISTEN      30752/named     
udp        0      0 192.168.1.71:53         0.0.0.0:*                           30752/named     
udp        0      0 127.0.0.1:53            0.0.0.0:*                           30752/named     
root at hostname:~#

The net result of this is that this command will fail ("Connection
timeout; no servers could be reached") on a normal install of ubuntu
with a bind9 install:

$ dig @`hostname` <any host name>

Whereas it should behave the same as:

$ dig @localhost <any host name>

I don't understand the motivation that Ubuntu had for setting '127.0.1.1
hostname hostname.domain' in /etc/hosts but given that it does, all
daemons need to support it.

** Affects: bind9 (Ubuntu)
     Importance: Undecided
         Status: New

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bind listens on 127.0.0.1:53 rather than *:53
https://bugs.launchpad.net/bugs/669751
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