siproxd - 1:0.8.1-4.1+b2 main

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.