What happens when you run the command: fw sam -J src [Source IP Address]?

The fw sam (Suspicious Activity Monitor) tool operates independently of the installed Security Policy by injecting blocking rules directly into the Check Point kernel. The '-J' flag activates blocking, and the 'src' keyword scopes the block to traffic originating from the given source IP address. This allows immediate response to threats without the delay of a policy compilation and installation cycle.

The 'src' keyword targets connections by their source IP address, not their destination; blocking by destination requires the 'dst' keyword instead.

Blocking traffic both to and from a target requires different syntax; 'src' only applies the block to connections where the specified IP is the source.

The primary purpose of fw sam is to block traffic without requiring a Security Policy change - requiring a policy change would defeat its purpose as a rapid-response tool.