When using SecureXL to confirm whether packets are being handled correctly, either capture the traffic on the directly connected router / switch, or disable SecureXL.įrom R80.20 Jumbo HotFix - Ongoing Take 73, added ability to FW Monitor to support monitoring of accelerated traffic by default. This is related to the way the SecureXL kernel driver is attached to the network adapter itself. Important Note: Traffic captures can be misleading when working with SecureXL since both FW Monitor and TCPdump do not always show 'real' packets that are going out to the network. If SecureXL is enabled on the Security Gateway, then FW Monitor and tcpdump will show only the non-accelerated packets (e.g., 'TCP SYN' will be shown, and 'TCP ACK' will not). Packets are defragmented as they leave the Security Gateway in both the inbound and outbound directions. It is supported to run only a single instance of FW Monitor at any given time.ĭo not modify Check Point kernel tables used in the security policy while FW Monitor is running, otherwise unexpected behavior may result (including a system crash). These captured packets can be inspected later using the WireShark (available for free from (2) WarningsĪnything related to policy installation or policy unloading on Security Gateway, will cause FW Monitor to exit. The FW Monitor utility captures network packets at multiple capture points along the FireWall inspection chains. Check Point's FW Monitor is a powerful built-in tool for capturing network traffic at the packet level.
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