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Nice. I've been using: https://addons.mozilla.org/en-US/firefox/addon/port-authorit...

It's one of those things where I grew up on the internet since win 95/98, and it's one of those things you know you can do with scripts, but never once think that you can download javascript out there in the wild that starts pinging your LAN devices, even internal ssh -D <port> <server> SSH tunnels and can deliver exploits and payloads.

Like.. somebody somewhere thought to protect us from that before now over all these years, right? ..right? Makes you wonder. Nice script/demonstration site. Thank you.

If you have uBlock Origin installed it should already protect you from this attack vector with "Block outsider intrusion into LAN" filter list, though.

And you also don't need this on Windows since 0.0.0.0 IP is blocked on a system level there.