Minor changes throughout the document.

FortiOS Carrier 6.4.6, and more recent versions, runs on the 3500F, 3501F, 4200F, 4201F, 4400F, and 4401F. This information has been added to FortiOS Carrier licensing.

Corrected information about how the policy-filter option works when configuring GTPv0/v1 and GTPv2 policy filtering. See Adding GTPv0/v1 policy filters to a GTP profile and Adding GTPv2 policy filters to a GTP profile.

Improved the explanation of how to select source and destination firewall addresses when setting up a GTP IP filter, see Encapsulated IP traffic filtering.

Added more information about SCTP support and creating SCTP firewall policies. See SCTP firewall.

Improvements to the descriptions in the following sections:

• Adding GTPv0/v1 policy filters to a GTP profile.

• Adding GTPv2 policy filters to a GTP profile.

New section: Diagnose firewall gtp tunnel list command.

Updated the list of FortiGate models that support FortiOS Carrier in FortiOS Carrier licensing.