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Inline Twice Static NAT Overview

Inline twice static NAT uses the capabilities of the MPC line card to perform address translation, eliminating the need for a services card.

Twice static NAT translates both the source and destination IP addresses. An addresses is translated with a one-to-one static mapping to an address in a pool. Port mapping is not performed.

The original private domain host source address is translated to a public source address.

The destination address is translated to the IPv4 address of a private server. This redirects traffic destined to a virtual host (identified by the original destination IP address) to the real host (identified by the translated destination IP address).


  • Allows hosts in the private network to connect with the external domain, while hiding the private network.

  • Hides a private network

  • Allows external traffic to communicate with a private host without revealing the host’s private IP address

  • Does not require port mapping

  • Eliminates the need for a services card

  • Supports more NAT flows than a services card