Example 1 With a NAT Firewall

The Oracle® Enterprise Session Border Controller (E-SBC) SIP proxy is configured with the following changeable parameters:

endpoint= IP address of the SIP UA
useradd= IP address of the Firewall Public IP address or the source layer 3 IP address of Register message
userport= IP address port number of the Firewall Public IP address or the source layer 3 IP address port of Register message
E-SBC address=63.67.143.217
firewall public address=10.1.10.21
firewall public address port=10000
SIP endpoint behind firewall=192.168.1.10

SIP message Contact header:

Contact:<sip:0274116202@63.67.143.217; endpoint=192.168.1.10; useradd=10.1.10.21; userport=10000; transport=udp>