Musing of a chubby Ginger kid.

In Cisco terminology there are three types of NAT:

1) Static - A one to one rule for internal IPs to external IPs. As an example the rfc1918 IP address 192.168.10.47 can be statically NATed to 45.67.10.47.

2) Dynamic - A pool of extrenal IPs are mapped to a pool of internal IPs. The IPs are assigned as they are needed and they can change around over time.

3) Overload - Only one public routable IP address is assigned to multiple rfc1918 private IPs. This is the type that a home DSL or cable user is likely to use on a home network. The is also known as Port Address Translation or PAT. This allows multiple machines to use one public IP address.