After setting the interface mode to inline and enabling the interfaces on a Cisco Secure Firewall Threat Defense (FTD) device in an inline IPS deployment, the next step is to configure an inline set. An inline set groups two interfaces that work together to inspect traffic passing between them.

Steps to configure an inline set:

In FMC, navigate toDevices > Device Management.

Select the FTD device and configure the interfaces.

Create a new inline set, adding the relevant interfaces that have been set to inline mode.

Deploy the configuration to the FTD device.

Configuring an inline set ensures that the traffic between the specified interfaces is inspected and processed according to the IPS policies, completing the implementation of the inline IPS deployment.