First, and based on my experience, not 100% sure , you can’t perform register without having username and password along side with a database, because (username and password0 are parts of the sip registration process, and you need them in order to be reachable and known in the network and monitored.
Reaching from external network is applicable as long as your server is reachable
BR Ammar
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From: Atux Atux Sent: Wednesday, November 22, 2017 4:43 PM To: sr-users@lists.kamailio.org Subject: [SR-Users] debian setup without registration
Hi. i am new to the are of kamailio. i am looking to install in a PC running debian 9 kamailio. that is easy since all i had to do was apt-get install kamailio. I am looking on how to setup the system in a way that everyone sending a register, to be able to register no matter what user name or passwd sends. i do not want a MYSQL server on that server. Could someone give me some hints on how to configure it please? In /etc/kamailio/kamctrlc i have SIP_DOMAIN=192.168.124.5 which is my IP. Everybody from my LAN 192.168.124.0/24 network must be able to send a register with any username and any passwd and be able to register. Also from the outside world, through port forward from my router. Some hints please?