I'm assuming you are interfacing with an external party, and then, yes, the external IP should be used for the RR header assuming that party should be able to route to that route.

Furthermore I assume you have multiple interfaces on your machine, in such case you need to set the listen/advertise param:

https://www.kamailio.org/wiki/cookbooks/5.1.x/core#listen

Cheers,
Samuel

From: sr-users <sr-users-bounces@lists.kamailio.org> on behalf of Wilkins, Steve <swwilkins@mitre.org>
Sent: Tuesday, February 6, 2018 00:32
To: Kamailio (SER) - Users Mailing List
Subject: [SR-Users] Contact and Record-Route are using Private IP Address- is this correct?
 

Hello All,

 

Contact and Record-Route are using Private IP Address - is this correct? I though the Public IP should be used.  I do not know what setting is causing this to happen.  Does anyone have any ideas?

 

Thank you,

-Steve