What Are the Differences Between NAT Server and Destination NAT?
1. After NAT Server is configured, the firewall creates a server map table. However, after destination NAT is configured, no server map table is created.
2. NAT Server has higher priority than destination NAT. Upon receiving the first packet of a data flow, the firewall looks up the server map table based on NAT Server configuration. If no entry is matched, the firewall performs destination NAT processing.
3. If parameter no-reverse is not specified in NAT Server configuration, address translation can be implemented on both directions, whereas destination NAT translates addresses only in one direction.