So today I happened to be looking at System Prefs/Network and below the entry in the left panel for my ethernet connection, I see "Radio Silence". The popup seems to imply its's a firewall or something. This is on a MacBook Pro 2021 M1. I think I deleted it (with the minus sign) and found all the places it had stuff, but there was no App in Applications or Utilities (unless the minus sign in the preferences deleted the app, as I did that first). Any ideas where it came from? I install very little on my Macs, I did install Wireshark network sniffer as we are debugging a problem (others are debugging - I am a software guy lol), but I also have Wireshark installed on a MacBook Pro Intel 2019 and it did not show up there. I installed SystHist in the last week from EclecticLight Company, so I think that is safe....would it have come from the 12.5.1 update? I am curious to know what it is in case a remnant is around somewhere, not knowing what it is. Thanks!