Tip

This is the documentation for the 22.06 version. Looking for the documentation of the latest version? Have a look here.

Network Address Translation

Network Address Translation, or NAT, involves changing properties of a packet as it passes through a router. Typically this is done to mask or alter the source or destination to manipulate how such packets are processed by other hosts.

The most common examples are:

• Source NAT, also known as Outbound NAT, which translates the source address and port of a packet to mask its origin.

• Destination NAT, commonly referred to as Static NAT or Port Forwards which translate the destination address and port of a packet to redirect the packet to a different target host behind the router.

TNSR applies NAT based on the configured mode and the presence of directives that set inside (internal/local) and outside (external/remote) interfaces.

An inside interface is a local interface where traffic enters and it will have its source hidden by NAT. An outside interface is an interface where that translation will occur as a packet exits TNSR. An example of this is shown in Outbound NAT.

Note

NAT is processed after ACL rules. For more information, see ACL and NAT Interaction.

Note

NAT-specific virtual reassembly parameters have been deprecated in favor of shallow virtual reassembly. See IP Reassembly.

• NAT Modes
  • Endpoint-independent NAT
  • Endpoint-dependent NAT
• NAT Global Options
  • NAT Forwarding
  • NAT Behavior
  • NAT Sizing Options
  • NAT Session Timeout Duration
  • Enable NAT
• NAT Pool Addresses
  • Single NAT Pool Address
  • Multiple NAT Pool Addresses
  • NAT Pool Interfaces
  • NAT Pool Route Table (VRF)
• Outbound NAT
• Static NAT
  • Port Forwards
  • 1:1 NAT
  • Twice NAT
• NAT Status
  • View NAT Configuration
  • View Static Mappings
  • View Dynamic Configuration
  • View Interfaces
  • View NAT Sessions
• NAT Examples
  • AWS NAT Examples
  • AWS Example without NAT
  • AWS Example with NAT