On Mon, Dec 17, 2018 at 9:29 AM Philipp Schöning <schoenin...@gmail.com> wrote:
> > > > > > If UDP is used for transport, empty UDP packets can be sent to keep the > >> NAT-binding alive. > >> > > > > Sending empty UDP is not standard complaint. Sending a STUN binding > > request, as described in > https://tools.ietf.org/html/rfc5626#section-3.5.2 > > is safer. > > > > This is not an option, if you are not using STUN. > There are lot of good reasons not to use STUN, e.g. because your IMS > provides sophisticated NAT traversal functionalities or your NAT type is > not compatible with STUN. > There are a lot of good reasons of not using STUN but there are no good reasons of not using STUN for UDP keep-alive. STUN keep-alive is extremely easy to implement. It is possible to verify packet validity and it can be used to detect local IP change. Regards, _____________ Roman Shpount _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
