[OpenSER-Users] port modification is sdp

[Konstantinos Koutsopoulos]

Hi Bogdan,

thanks for the response, but I actually need the ports to remain the same.
The address modification is convenient.

Kostas


Bogdan-Andrei Iancu wrote:
> Hi Kostas,
>
> If you want to change only the port, try the mangle module:
>    http://www.openser.org/docs/modules/1.2.x/mangler.html#AEN99
>
> Regards,
> Bogdan
>
> Konstantinos Koutsopoulos wrote:
>> Hi,
>>
>> I am deploying openser 1.2.2-notls on a machine with public IP.
>> On the same machine I run a sip client (A) that registers with the
>> above openser.
>>
>> On an another machine behind NAT (typical adsl router) I use a sip 
>> client (B)
>> to register with the above openser and try to invite sip client A.
>>
>> I do not use any NAT-traversal techniques (the outgoing packets from
>> B are modified by NAT and reach openser, responses are received by
>> B through NAT due to statefull (?) routing on the NAT).
>>
>> The SIP messages reach their destination properly and moreover
>> the IP addresses in the SDP (from B) are updated by openser
>> to indicate the external interface of NAT. This is very useful in
>> my case since the client A sends the media packets to the proper
>> address (I also configure virtual servers on the adsl router to have
>> these forwarded to B). However, the port numbers in the SDP are
>> also updated (usually by an offset of +16) which hinders the media 
>> session
>> from A to B since B is expecting the packets on other ports.
>>
>> Is there any way to have the ports remain unaltered during the above 
>> operation?
>>
>> Thanks in advance,
>>
>> Kostas
>>
>>   
>
>