Install siproxd by entering the following commands in the terminal:
sudo apt update sudo apt install siproxd
Description:
SIP proxy/redirect/registrar
Siproxd is a proxy/masquerading daemon for the SIP (Session Initiation Protocol) which is used in IP telephony. It handles registrations of SIP clients on a private IP network and performs rewriting of the SIP message bodies to make SIP connections possible via a masquerading firewall. It allows SIP clients (like kphone, linphone) to work behind an IP masquerading firewall or router.
Homepage: http://siproxd.sourceforge.net/
Version: 1:0.8.1-4.1build1
Section: universe/net