To list the rules of a PF (Packet Filter) firewall on OpenBSD, FreeBSD, or NetBSD, you can use the pfctl command with the -sr option.
For example, to list the rules of the PF firewall on an OpenBSD system, you can use the following command:
pfctl -sr
This will display the rules of the PF firewall in a human-readable format.
You can also use the -v option to display the rules in a more verbose format, which includes additional information such as counters and state information. For example:
pfctl -srv
You can also use the -sT option to display the rules in a terse format, which includes only the rule numbers and the rule definitions. For example:
pfctl -sT
For more information about using the pfctl command to list the rules of a PF firewall on OpenBSD, FreeBSD, or NetBSD, you can refer to the pfctl man page or search online for tutorials and examples.