On 11/08/11 19:06, Clint Byrum wrote:
> Marking importance in bind as medium. I can see a definite need for the
> "FQDN" of the machine to always be addressable for services, and bind
> would need to work the same as other services that listen on "0.0.0.0".
> There are workarounds, and this is only some use cases, so Medium seems
> appropriate.
>
> ** Changed in: bind9 (Ubuntu)
> Importance: Undecided => Medium
The Bind Manual from the latest ubuntu bind9-doc package says:
If no listen-on is specified, the server will listen on
port 53 on all IPv4 interfaces.
This statement is ambiguous. However, my /etc/bind/named.conf.options
DID NOT contain a listen-on clause and yet it does not listen on
0.0.0.0:53 (or :::53). It listens only on the explicit addresses of
localhost (127.0.0.1) and my ethernet interface.
The Bind Manual goes on to say:
When { any; } is specified as the address_match_list for the
listen-on-v6 option, the server does not bind a separate socket
to each IPv6 interface address as it does for IPv4....
This implies that the IPv4 listen addresses will be selected after
enumerating the available interfaces. If true, then bind9 will not
discover the 127.0.1.1 address assigned in the default hosts file
because it isn't defined as an interface.
I tried a bypass of explicitly coding within the options section:
listen-on { 127.0.0.1; 127.0.1.1; 10.1.252.11; };
After I restarted bind9, I was disappointed to see only:
tcp 0 0 10.1.252.11:53 0.0.0.0:* LISTEN 15451/named
tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN 15451/named
udp 0 0 10.1.252.11:53 0.0.0.0:* 15451/named
udp 0 0 127.0.0.1:53 0.0.0.0:* 15451/named
... it still isn't listening on 127.0.1.1!
p.s. cvsd doesn't listen on 0.0.0.0:2401, but it probably doesn't
matter.
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https://bugs.launchpad.net/bugs/604283
Title:
network servers do not listen on 127.0.1.1
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