Requirements for NAT Configuration
- Access Lists: All access lists required for usage with the configuration tasks provided must be configured before beginning a configuration activity.
- NAT Prerequisites: Before configuring NAT on your network, make sure you understand which interfaces are set up for NAT and for what purposes.
The following prerequisites will assist you in determining how to configure and operate NAT:
- Users exist through a variety of interfaces.
- The internet is accessible via several interfaces.
Configuring NAT For IP Address Conservation in Cisco
IP address conservation is the goal of Network Address Translation (NAT). It makes it possible for private IP networks to connect to the Internet using unregistered IP addresses. Before packets are routed to another network, NAT acts as a router, typically connecting two networks, and converts the private (not globally unique) addresses in the internal network into lawful addresses. NAT can be set up to only advertise one address to the outside world for the entire network as part of this functionality. Effectively concealing the entire internal network behind one address, boosts security. NAT is frequently used in contexts with remote access because it provides the combined benefits of security and address conservation.