[asterisk-users] Asterisk not receiving call from VPN address

[David Cunningham]

Hi Larry,

Thanks for the reply. We have all of those settings left out of our
sip.conf, so this should allow everything, right?



On 21 January 2014 17:38, Larry Moore <lmoore at omninet.net.au> wrote:

> Have you checked your localnet=, deny=, permit=, contactdeny= &
> contactpermit= settings?
>
> My 2c worth.
>
>
> On 20/01/2014 10:51 AM, David Cunningham wrote:
>
>> Hi,
>>
>> We have a Kamailio and Asterisk cluster, both machines being on a real
>> 103.x IP address and also on a 172.x OpenVPN address.
>>
>> The problem is that when Kamailo receives a call from the VPN and
>> forwards it to the Asterisk server on it's 103.x address, Asterisk never
>> sees the call.
>>
>> If Kamailio receives a call from the VPN and forwards the call to the
>> Asterisk server on it's 172.x address then it works. However, if the
>> call isn't from the VPN then forwarding it to the 172.x address doesn't
>> work. So basically the problem is going between the real network and the
>> VPN.
>>
>> The question is, how can we make this work when calls are received on
>> either network on the Kamailio server and are forwarded to Asterisk?
>>
>> Using ngrep on the Asterisk server we see that it does receive the
>> INVITE, but Asterisk's logging shows no sign it at all. We guess it's a
>> Linux networking issue rather than Asterisk's fault, but don't know
>> where to fix it. We do have net.ipv4.ip_forward = 1 on both the Kamailio
>> and Asterisk servers.
>>
>> Thanks in advance for any help.
>>
>> The ngrep on the Asterisk server:
>>
>> U 2014/01/17 13:15:15.599557 172.x.x.x:5060 -> 103.y.y.y:5060
>> INVITE sip:9067268 at 103.y.y.y:5060;transport=udp SIP/2.0.
>> Record-Route: <sip:172.x.x.x;lr=on>.
>> Via: SIP/2.0/UDP 172.x.x.x;branch=z9hG4bK50c7.f49ceb73.0.
>> Via: SIP/2.0/UDP 192.z.z.z:5062;rport=5062;branch=z9hG4bK806710997.
>> From: "9067271" <sip:9067271 at 172.x.x.x>;tag=198791249.
>> To: <sip:9067268 at 172.x.x.x>.
>> Call-ID: 1905625787 at 192.z.z.z.
>> ...
>>
>> 172.x.x.x is the Kamailio server's VPN address
>> 103.y.y.y is the Asterisk server's real address
>> 192.z.z.z is the calling phone's LAN address
>>
>> --
>> David Cunningham, Voisonics
>> http://voisonics.com/
>> USA: +1 213 221 1092
>> UK: +44 (0) 20 3298 1642
>> Australia: +61 (0) 2 8063 9019
>>
>>
>>
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-- 
David Cunningham, Voisonics
http://voisonics.com/
USA: +1 213 221 1092
UK: +44 (0) 20 3298 1642
Australia: +61 (0) 2 8063 9019
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