Question on listen-on & listen-on-v6 option

[Mark.Andrews at nominum.com]

> 
> Hello All,
> 
>     I need some clarrification on using listen-on & listen-on-v6 option.
> 
>     In BIND9, I understand that by specifying listen-on-ipv6 { any; };
>      named will  listen on all IPv6 and IPv4  interfaces  in IPv6
> machine.
> 
>    Then under this scenario what is the use of specifying the listen-on
> option??
> 
>     Suppose I have system with four interface two IPv4 (A,B) & 2 IPv6
>      (C,D).
> 
>     By specifying listen-on option by following
> 
>     options {
>                 listen-on { A ; };
>                 listen-on-v6 { any ; };
>         };
> 
>     Will named listen only to the A,C,D interfaces and not B??
> 
>     Can I ask only interface A to listen on particular port??
> 
>     To put it short, what is  the use of specifying  the listen-on
> option
>     when the  listen-on-ipv6 any  option is specified in the named.conf
> file ??
> 
>     Thanks,
> 
> With Regards,
> D.Dhana.
> 
> 
> 
	It depends on the OS kernel. The traffic to B may or may not
	be delivered to the socket handling the IPv6 queries.

	Mark
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com