Short, step-by-step walkthroughs from four decades of building and securing real networks — each with a way to check it worked and the mistakes to avoid.
Firewalls collect stale and overly broad rules over the years, and each one quietly widens what an attacker can reach. Here is a safe, step-by-step way to find them and remove them without breaking what people rely on.
Eight quick checks that catch the gaps behind most small-business break-ins: email without two-step sign-in, reused passwords, missed updates, an exposed router and untested backups. No special tools needed.
Most people find out their backups don't work on the day they need them. Three copies, on two devices, with one offsite, plus a regular restore test, means a dead drive, theft or ransomware costs you an afternoon, not your files.
Smart TVs, cameras and plugs are the least-updated computers in your home. Moving them to a separate Wi-Fi network takes about 30 minutes and keeps a hacked gadget away from your laptops, phones and files.