Thank you so very much for the down to earth answer. It never fails that the simplest thing trip you up.The check marks are the ports that the CAN be communicated with. For example, in your screen capture, port 1 can communicate with all other ports.
I have setup my CSS326-24G Switch using the following settings in "Port Isolation Tab". With the port check marks as in this clip I am unable to get any communication from my WAN port. What am I missing in the setup of this switch? All I want to do is isolate each port from the other and have my wan on port 1.Could someone please point me to the proper configuration of this switch?The Port Isolation menu can look confusion from the start, you almost need trial and error to wrap your head around.
However, some more description and examples are now added to Wiki. See if this manual looks better now.