Sonicwall "DNS NAT Loopback"

The Issue

An internal client attempts to reach an external address tied to their domain and gets page cannot be displayed.

The Resolve

Using SonicWALL SonicOS 5.x:

• Create a new NAT policy with the following parameters:
  • Original Source: LAN Subnets
  • Translated Source: WAN Primary IP
  • Original Destination: (the server’s external IP address)
  • Translated Destination: (the server’s real/internal IP address)
  • Original Service: Any
  • Translated Service: Original
  • Inbound Interface: Any
  • Outbound Interface: Any