NAT server and Destination NAT

Hi,

Difference between NAT server and Destination NAT:

·         After NAT Server is configured, the firewall creates a server map table. However, after destination-nat is configured, no server map table is created.

·         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.

·         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.

Hello User,
NAT Server is a static destination NAT technology. Both NAT Server and policy-based static destination NAT can be used when there are fixed mappings between private and public IP addresses. Policy-based destination NAT can match multiple address ranges in a NAT policy and supports the address exclusion configuration (that is, excluding some addresses from an address range), allowing for flexible configurations. NAT Server is easier to configure, with mappings specified one by one.
Also there are the following differences:
   After NAT Server is configured, the firewall creates a server map table. However, after destination-nat is configured, no server map table is created.
   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.
   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.

https://forum.huawei.com/enterprise/en/dr-wow-q-a-what-are-the-differences-between-nat-server-and-destination-nat/thread/592078-867

BR,