According RFC3261

The default transport is scheme dependent. For sip:, it is UDP.
For sips:, it is TCP.

According to the OPTIONS message above, Kamailio tries to use UDP transport for "sips" schema.
Another approach, as a workaround, update the Contac header and add "transport=tcp" when using "sips" schema.


Reply to this email directly, view it on GitHub, or unsubscribe.
You are receiving this because you are subscribed to this thread.Message ID: <kamailio/kamailio/issues/3178/1179513152@github.com>