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Tag: nmap

Port knocking on a keyboard

What Is Port Knocking, and Why Should You Use It?

Can you make your servers invisible to attackers? Well, maybe not in the physical, super-hero sense. But digitally, yes, you can. Port knocking and single-packet authentication (SPA) can hide servers, gateways, and other devices from prying eyes. They help make devices unresponsive to digital probes from the thousands of casual...