asterisk users - Mar 2013 - Asterisk 1.8 and dual stack support

Hi folks,

Following an upgrade to Debian wheezy, I'm now running Asterisk 1.8.13.1. 
As opposed to Asterisk 1.6.2.9 that I ran with squeeze, this version can 
support IPv6. However, it seems that I can't get it to support both IPv4 
and IPv6 at the same time. For example, if in sip.conf I set the bindaddr 
variable to '::' it will only listen on IPv6 and none of my IPv4-only 
friends and peers will be able to connect to it. On the other hand, if I 
set it to '0.0.0.0' then it will not listen on IPv6.

Is this a bug, or is this simply a limitation of Asterisk 1.8.13.1, or is 
there some other way to configure it for dual-stack support?

Thanks,

Jaap

please see,

http://lists.digium.com/pipermail/asterisk-users/2013-March/278130.html

On Thu, Mar 21, 2013 at 5:47 PM, Jaap Winius <jwinius at umrk.nl> wrote:
> Hi folks,
>
> Following an upgrade to Debian wheezy, I'm now running Asterisk
1.8.13.1.
> As opposed to Asterisk 1.6.2.9 that I ran with squeeze, this version can
> support IPv6. However, it seems that I can't get it to support both
IPv4
> and IPv6 at the same time. For example, if in sip.conf I set the bindaddr
> variable to '::' it will only listen on IPv6 and none of my
IPv4-only
> friends and peers will be able to connect to it. On the other hand, if I
> set it to '0.0.0.0' then it will not listen on IPv6.
>
> Is this a bug, or is this simply a limitation of Asterisk 1.8.13.1, or is
> there some other way to configure it for dual-stack support?
>
> Thanks,
>
> Jaap
>
>
> --
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----- Original Message -----
> From: "Jaap Winius" <jwinius at umrk.nl>
> To: asterisk-users at lists.digium.com
> Sent: Thursday, March 21, 2013 12:47:57 PM
> Subject: [asterisk-users] Asterisk 1.8 and dual stack support
> 
> Hi folks,
> 
> Following an upgrade to Debian wheezy, I'm now running Asterisk
> 1.8.13.1.
> As opposed to Asterisk 1.6.2.9 that I ran with squeeze, this version
> can
> support IPv6. However, it seems that I can't get it to support both
> IPv4
> and IPv6 at the same time. For example, if in sip.conf I set the
> bindaddr
> variable to '::' it will only listen on IPv6 and none of my
IPv4-only
> friends and peers will be able to connect to it. On the other hand,
> if I
> set it to '0.0.0.0' then it will not listen on IPv6.
How are you determining that it is not listening on IPv4?

bindaddr=:: should allow you to support dual stack.

Michael

Hi there


Michael L. Young wrote:
> How are you determining that it is not listening on IPv4?
>
> bindaddr=:: should allow you to support dual stack.
Which is the way it works with 1:1.8.11.1-1digium1~squeeze.
I even use Asterisk as a RTP audio IPv4 <-> IPv6 proxy.

Regards,
Rob

Jaap Winius, 21.03.2013 17:47:
> support IPv6. However, it seems that I can't get it to support both
IPv4
> and IPv6 at the same time. For example, if in sip.conf I set the bindaddr 
> variable to '::' it will only listen on IPv6 and none of my
IPv4-only
> friends and peers will be able to connect to it. On the other hand, if I 
> set it to '0.0.0.0' then it will not listen on IPv6.
This is well explained here: http://serverfault.com/a/39561

In short: In Linux, binding to :: means bind to both ipv6 and ipv4.
Setting /proc/sys/net/ipv6/bindv6only to 1 changes this behaviour, and
Debian has this by default (since squeeze, AFAIK).

So this is a system issue, not an Asterisk. At least unless one
considers Asterisk's shortcoming of not being able to use more than one
socket an issue.