Set Up

In order to run your own SIP forwarding daemon, there are two things to consider:

• IP address: it is advised to explicitly bind the daemon to a specific IP (or IPv6) address using the -b command line option.

• DNS: in order to have SIP requests for example.com routed to your SIP forwarding server, you will either have to set up your DNS zone such that A/AAAA records for example.com point to the SIP forwarding server, or add an SRV record for _sip._udp.example.com.

As an example, have a look at the setup for the cmeerw.org domain which has a SRV record:

_sip._udp.cmeerw.org.   28800   IN      SRV     10 0 5060 edge.cmeerw.net.

and A/AAAA records for edge.cmeerw.net:

edge.cmeerw.net.        28800   IN      A       217.11.63.119
edge.cmeerw.net.        28800   IN      AAAA    2001:6f8:131c::1

Consequentially, the SIPFwd daemon is bound to these IP addresses using the the -b command line option:

sipfwd -b 217.11.63.119 -b 2001:6f8:131c::1