PAT

With PAT the Router providing the PAT service will translate internal (Private-Nonroutable) addresses to external (Public-Routable) addresses

Inside Your Network

Outside Your Network

10.1.1.10:2222

10.1.1.11

10.1.1.12

11.1.1.10:7777

10.0.0.0 to 10.255.255.255

172.16.0.0 to 172.31.255.255

192.168.0.0 to 192.168.255.255

Private Address Ranges

Inside Local

Outside Local

Inside Global

Outside Global

PAT / NAT uses 4 Addresses to send a Packet: Inside Local, Outside Local, Inside Global, Outside Global

82.6.4.2:443

10.1.1.10

82.6.4.2:443

10.1.1.10:2222

Notice how the port number is used to identify the session