7 Jul
2009
7 Jul
'09
8:27 p.m.
2009/7/7 Daniel-Constantin Mierla <miconda(a)gmail.com>om>:
Not sure now if dialog module is fully required for all the cases...
It's just required if you want to mantain nat keepalive for calls
initiated by non registered users.
I use
nat-traversal module and it's MUCH MUCH more powerful than
nathelper, for sure.
I do not agree at all with this, when comes to flexibility. nat_traversal
main problem is the relying on dialog module, which adds lot of overhead to
a proxy. For presence, like for registration, the keepalive
should be done by the
endpoint (registrar, presence server), otherwise you get into scalability
issues.
Imagine a presence agent machine (behind NAT) subscribing to the
presence of some users without registering. How to mantain the
keepalivee in Kamailio (without using nat_traversal module)? The dirty
solution would be decrease the notification interval, that of course
would be a wrong choice.
--
Iñaki Baz Castillo
<ibc(a)aliax.net>