Re: [OpenSER-Users] port modification is sdp

Hi Bogdan, exactly that is why I did not manage to explain, although I am relatively new user to openser. I tried to locate documentation that explains this behaviour and I found that no module performing such action is loaded and configured in my set-up. I have just captured the packets to and form openser and saw that openser alters the sdp fields. Regards, Kostas Bogdan-Andrei Iancu wrote: > Hi, > > But who is changing the IP and port in SDP? The script you sent makes > no changes on the SDP part of the messages. > > regards, > bogdan > > Konstantinos Koutsopoulos wrote: > >> 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 >>>>