Using Private Addresses with NAT
Used to provide additional security
Assigns private IP addresses to devices inside the network
- Even if they are discovered, no packets with these addresses will be delivered (publicly illegal IP address)
- Example: Assigned by ICANN: 128.192.55.xx
- Assign to NAT proxy server: 128.192.55.1
- Assign to internal computers: 10.3.3.xx
- 10.x.x.x is reserved for private networks (never used on Internet)
- No problem for users as handled by NAT proxy server, but big problem for intruders
- Additional benefit is that it gives ability to have more internal IP addresses for an organization