Which command can you use to verify the number of active concurrent connections?

 The command fw ctl pstat can be used to verify the number of active concurrent connections on a gateway. This command displays various statistics about the firewall kernel, such as memory usage, CPU utilization, packet rates, and connection table information. The output of this command includes a line that shows the current number of connections and the peak number of connections since the last reboot. For example:

This means that there are currently 1234 active connections out of a maximum of 8192 connections, which is 15% of the connection table capacity. The peak number of connections since the last reboot was 2345.