22 Aug
2010
22 Aug
'10
7:46 a.m.
Hello All,
I'm using Kamailio as a Border controller for my VoIP Research project at my
school.
The problem I'm facing is Kamailio routes the traffic to the private network
where my asterisk machine is listening.
The asterisk machine responds to the Kamailio using the public network but
not the private. Is this an issue with Asterisk? If so how do I resolve it?
client kam_public Kam_pvt Ast_pvt Ast_public
| | | |
|
| | | |
|
| INVITE | | |
|
|---------------->| | INVITE | |
| | |---------->| |
| | | |
|
| | | |
|
| | | |
|
| | | 404 |
|
| |<----------|-----------|-----------|
| | | |
|
| | | ACK |
|
| | |---------->| |
| | | |
|
| 404 | | |
|
|<----------------| | | |
| | | |
|
| ACK | | |
|
|---------------->| | | |
| | | |
|
| | | |
|
Regards
Gnaneshwar
25 Aug
25 Aug
9:29 p.m.
On Sunday 22 August 2010, Gnaneshwar Gatla wrote:
I'm using Kamailio as a Border controller for my
VoIP Research project at
my school.
The problem I'm facing is Kamailio routes the traffic to the private
network where my asterisk machine is listening.
The asterisk machine responds to the Kamailio using the public network but
not the private. Is this an issue with Asterisk? If so how do I resolve it?
Hi Gnaneshwar,
it could be several issues, normally asterisk should respect the incoming
interface and route appropriately. Maybe your IP routing on the asterisk box
is not correctly configured? Or as a workaround, maybe you could just route
the traffic from the kamailio also to the asterisk over the public interface?
Cheers,
Henning
26 Aug
26 Aug
12:17 p.m.
I think you have multiple issues:
(not sure if I am right as I have to guess your network setup)
1. If Kamailio is an Application Layer Gateway between the public and
the internal network, then of course Asterisk should listen only on the
internal interface. Thus in sip.conf add:
udpbindaddr = internal.ip.add.ress
Further you can tweak if Asterisk should use internal or public IP
addresses inside the SIP message headers by playing around with
externip = ...
localnet = ...
2. Regardless of the Via header inserted by Kamailio Asterisk should
respond to the IP address from which Kamailio sent the request. Thus I
guess Kamailio sent the request with the public IP address as source IP.
To have Kamailio acting correctly you have to make sure that Kamailio is
listening on both interfaces
(http://sip-router.org/wiki/cookbooks/core-cookbook/devel#listen):
listen=udp:public.ip.add.ress:5060
listen=udp:internal.ip.add.ress:5060
and activate multihoming feature of Kamailio to have proper IP addresses
in Via and Record-Route headers
(http://sip-router.org/wiki/cookbooks/core-cookbook/devel#mhomed)
mhomed=1
regards
Klaus
Am 22.08.2010 04:46, schrieb Gnaneshwar Gatla:
Hello All,
I'm using Kamailio as a Border controller for my VoIP Research project at my
school.
The problem I'm facing is Kamailio routes the traffic to the private network
where my asterisk machine is listening.
The asterisk machine responds to the Kamailio using the public network but
not the private. Is this an issue with Asterisk? If so how do I resolve it?
client kam_public Kam_pvt Ast_pvt Ast_public
| | | |
|
| | | |
|
| INVITE | | |
|
|---------------->| | INVITE | |
| | |---------->| |
| | | |
|
| | | |
|
| | | |
|
| | | 404 |
|
| |<----------|-----------|-----------|
| | | |
|
| | | ACK |
|
| | |---------->| |
| | | |
|
| 404 | | |
|
|<----------------| | | |
| | | |
|
| ACK | | |
|
|---------------->| | | |
| | | |
|
| | | |
|
Regards
Gnaneshwar
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2 comments
3 participants
participants (3)
-
Gnaneshwar Gatla -
Henning Westerholt -
Klaus Darilion