NAT (Network Address Translation)
NAT allows you to hide a whole private network (which may contain thousands of machines) behind a single IP address. This has a number of benefits:
- If your Internet connection (and thus external IP address) changes, you do not need to re-configure any machines except the NetManager.
- All internal machines are protected from access from the outside
- You can easily filter outbound traffic from internal machines using firewalling.
- You can have many more internal machines than your ISP have allocated you IP addresses for. Some LEA-provided school connections may have only 256 addresses. Real Internet connections have even fewer (perhaps only 1 or 5).
NAT is easily enabled in webadmin by going to Network > NAT
To allow access to internal machines from outside, you will need to use Port Mapping.