Network address translation (NAT) rules

NAT rules allow the rewriting of the source address of traffic. It is used to forward packets to a destination port to an another destination IP and port.
In this example we want to forward  our OpenVPN clients (UDP packets on port 1194)  forwarded to our OpenVPN server

  • On the Firewall section, click on New NAT rule under the Network address Translation


  • On the Type we choose UDP protocol and requested port the 1194,
  • Requested Address limits which client want to access to the port ( means everyone).
  • We can specify which network interface can handle the request port ( we choose our WAN Interface )
  • The destination address is our VPN server and destination port is the port that listen the OpenVPN service.


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