[Kamailio-Users] Having problems using RTPProxy to bridge internal/external networks

[Alex Balashov]

Alex Balashov wrote:
> Daniel-Constantin Mierla wrote:
> 
>> IIRC, I use:
>>
>> if(dst_ip==private_ip)
>>       force_rtp_proxy("ocfaei");
>> else
>>       force_rtp_proxy("ocfaie");
>>
>> rtpproxy started with: -l external_ip/private_ip
>>
>> Probably is rtpproxy 1.1 -- cannot check right now.
> 
> I just tried this and it works, from the point of view of SDP.  We were 
> already able to obtain this result.
> 
> The problem is that the actual rtpproxy does not seem to forward the 
> packets that come into one interface toward the other, so no media is 
> exchanged.
> 

An additional note:  if I turn OFF /proc/sys/net/ipv4/ip_forward and 
then start the proxy in bridging mode, the following happens when it is 
invoked:

DBUG:handle_command: received command "8725_4 UAIEc0,101 
5f1690462d84b3814915b05f65c626bd at 208.52.173.7 208.52.173.7 11832 
as214288b6;1"
INFO:handle_command: new session 
5f1690462d84b3814915b05f65c626bd at 208.52.173.7, tag as214288b6;1 
requested, type strong
Segmentation fault

In other words, it seems to require ip_forward to be on in order to not 
crash, but when it is on, no packets are exchanged between the interfaces.

-- 
Alex Balashov - Principal
Evariste Systems
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