# Define NetBIOS Protocol options

The NetBIOS Protocol Agent can be used to make NAT modifications in IP addresses transported in the payload of Windows NetBIOS Datagram Service connections through the Firewall. It can also be used for deep inspection on IPS engines and Layer 2 Firewalls.

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For more details about the product and how to configure features, click Help or press F1.

## Steps

1. In the properties of a custom UDP Service you have created, click Select next to the Protocol field and select NetBIOS (UDP).
2. On the Protocol Parameters tab, set the parameters for the Protocol Agent.
3. Click OK.