The file is a Cisco Packet Tracer lab file, likely designed to simulate or test a Virtual Private Network (VPN) configuration involving a FortiGate (FG) firewall or a similar gateway device . Overview of the Lab Environment
IPsec Site-to-Site VPN FortiGate Cisco Router - Weberblog.net VPN FG.pkt
Establishing a secure connection between two different office branches, both using FortiGate devices. The file is a Cisco Packet Tracer lab