Hi Keerthi, rport is used to put infomation in sip message itself ,if some nat is in between two sip entities. If you doesn't want to keep some transaction state information for each request received , it's the used to send response accross nat.
note: rport is supported by all sip stacks I have work on. Regards, Sumit Jindal On Tue, Nov 24, 2009 at 4:30 PM, KEERTHI KUMAR <[email protected]> wrote: > > Hi Attila, > Firsly thanks for your response; in my current setup, the > application using my SIP Stack has the support of STUN client. > > As per my current info, STUN supports for 3 types of NAT's (i.e. Full Cone, > Restricted Address Cone and Port restricted Cone NATs) and it does not > support for Symmetric NAT's. > But when a n/w device hosting Symmetric NAT functionality (say Router) is > deployed, that generally have Virtual Server or DMZ support embedded with > it, which hides Symmetric NAT problems and functions as Full Cone NAT. So, > STUN can be used. > > So, does implementing 'rport' will add value to my SIP Stack core? > > Thanks, > T. Keerthi Kumar > > > --- On Tue, 24/11/09, Attila Sipos <[email protected]> wrote: > > > From: Attila Sipos <[email protected]> > Subject: RE: [Sip-implementors] [RPort] Request to know unique use case of > rport > To: "KEERTHI KUMAR" <[email protected]>, > [email protected] > Cc: [email protected] > Date: Tuesday, 24 November, 2009, 3:56 PM > > > STUN doesn't work for all NAT types, I believe rport does. > > rport is a very simple mechanism without very low overhead for achieving > simple NAT traversal without requiring a separate protocol such as STUN > which requires a STUN client and STUN server. > > rport's use cases are not unique but for UDP SIP signalling, it is the > most efficient way of NAT traversal. > > Regards > > Attila > > > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of KEERTHI KUMAR > Sent: 24 November 2009 10:21 > To: [email protected] > Cc: [email protected] > Subject: [Sip-implementors] [RPort] Request to know unique use case of > rport > > Hi All, > Myself Keerthi Kumar, currently planning to implement 'rport' > support in the SIP Stack using RFC 3581. But, now i am stuk at finding a > Valid use case that 'rport' solves and leads over STUN or other NAT > traversal techniques. > > So, i request you to please suggest me few use cases of 'rport'. > > Thanks, > T. Keerthi Kumar > > > The INTERNET now has a personality. YOURS! See your Yahoo! Homepage. > http://in.yahoo.com/ _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > > > The INTERNET now has a personality. YOURS! See your Yahoo! Homepage. > http://in.yahoo.com/ > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
