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- First port: Specify the port 500.
- Last port: Specify the port 500.
- Intranet address: Specify the IP address of the Unified Firewall in the intermediate network between the Unified Firewall and the LANCOM router.
- Protocol: From the drop-down menu, select UDP.
3.3) Create a further entry and specify the UDP port 4500.
3.4) Write the configuration back to the router.