There are many SK and diagrams available on Internet as well as on checkpoint portal to describe the Packet flow of Checkpoint firewall. Checkpoint process the packet in the ingress and the egress using two CHAINS. I have seen in many places fw ctl chain is referred to understand the packet flow but I am not able to interpret it. Need your urgent comments and shared There is a controversy in Books and Experience shared by Experts regarding Packet flow. dear, Can somebody explain me the packet flow in to out in checkpoint blades specially for QOS. Because i have seen some traffic is accepted at QOS blades on service port 445, but no any allow rules are created for that service. Re: Security Gateway Packet Flow and Acceleration - with Diagrams Thank you very much for the detailed post and explanations, it was very useful and educational. CheckPoint Packet Flow Checkpoint process the packet in the ingress and the egress using two CHAINS. I have a question though, one of the first stages in the drawing is … Basic:-Physical layer – ingress interface-Data Link Layer/Ethernet-Inspect Driver [inspect Engine] -Network Layer/IP Routing-Inspect Driver Check Point Security Gateway Architecture and Packet Flow Technical Level Email Print Solution ID sk116255 Technical Level Product Security Gateway Version R77, R77.10, R77.20, R77.30, R80.10 OS Gaia Last Modified . Hello All, I am very confused with the packet flow of checkpoint firewall. Dear All, I need Experts advice to know the proper Packet flow in Checkpoint Firewall.