Siproxd is a proxy/masquerading daemon for the SIP protocol. It
handles registrations of SIP clients on a private IP network and
performs rewriting of the SIP message bodies to make SIP connections
work via an masquerading firewall (NAT). It allows SIP software
clients (like kphone, linphone) or SIP hardware clients (Voice over
IP phones which are SIP-compatible, such as those from Cisco,
Grandstream or Snom) to work behind an IP masquerading firewall or
NAT router.
from markus@
oSIP provides a SIP stack with a limited set of features common to
any kind of SIP Agents. Thus oSIP is not oriented towards any
particular implementations and can be used for implementing SIP
End-Point, Proxy or any kind of more specific SIP Agent such as
B2BUA.
from markus@