Panasonic KX-HGW600 - Manual (Page 98)

Operating Instructions
98
IP Masquerade
This function shares a single global IP address with multiple private IP addresses.
This way you can access the WAN (Internet) from multiple PCs on the LAN side using
a single global address.
xxx.yyy.zzz.103
Global IP address
for IP Masquerade function
192.168.0.1
Address Translation
192.168.0.2 WAN (Internet)
Address Translation