pfSense

The filtering capability of Diagnostics > States > States is very limited and cannot handle multiple conditions.

Searching for just an IP such as 8.8.8.8 gives the option to Kill filtered states. However, searching for an IP and port such as 8.8.8.8:443 has no option to Kill filtered states. If the filter is able to find the states, then it should be able to kill the states as well. You can still kill each state individually, but this is very time-consuming and error-prone.

Other useful capabilities would be to have separate filtering for source and destination, and for IP address and state type. Example use cases would be to find states from client 192.168.1.20 to 8.8.8.8:53, or to find all connections to server 192.168.1.30 with a type of SINGLE:NO_TRAFFIC.