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That Creepy Moment a Random Website Tried to “Talk” to My Printer

(and how Chrome finally gave us a big red NO button)

It was 11 p.m. I was half-watching a YouTube video about sourdough starters when my HP printer in the hallway suddenly woke up and started flashing like it wanted to print something.

No one was printing.
Nothing was in the queue.
It just… came to life.

A bit of digging later and the answer was not fun:
some dodgy ad on a random website had tried to talk to my printer over my home network. Exactly the kind of thing you don’t want happening quietly in the background.

For years, this kind of behaviour was normal. Any website could poke at your local network devices – router, printer, smart TV, NAS, baby monitor – and your browser would happily let it happen without ever asking you.

Then Chrome 142 turned up like a bouncer and started asking:
“Who exactly are you trying to visit in this house?”

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Before Chrome 142: Your Browser as a Nosy Neighbour

Here’s what used to be possible:

• A web page could try to scan your local network.
• It could look for devices like printers, routers, TVs, cameras and NAS boxes.
• If it found something, it could try to:
  • Send commands
  • Check firmware versions
  • Probe for known security holes

All while you just thought you were reading an article, scrolling social media or watching a video.

It was like letting a stranger into your hallway and hoping they only looked at the wallpaper.

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Chrome’s New “Do Not Disturb the House” Switch

From Chrome 142 onwards, Google finally added proper protection:
Local Network Access controls.

Instead of silently allowing websites to reach into your network, Chrome now:

• Treats your home network like a private zone
• Blocks access by default (depending on your setting)
• Pops up a clear permission prompt when a site wants to talk to devices on your network

You decide who can see your printer, TV, router and other devices – not the web page.

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How to Lock It Down in 10 Seconds

Here’s how to set it once and forget it:

1. Open Chrome.
2. In the address bar, paste this and press Enter:
   chrome://settings/content/localNetworkAccess
3. You’ll see three options. Pick how strict you want to be:
   • Sites can ask to connect to devices on your local network
     • Chrome will prompt you each time. Good if you cast/stream a lot.
   • Sites you’ve allowed before can connect automatically
     • Trusted sites you’ve already approved carry on working quietly.
   • Don’t allow sites to connect to devices on your local network
     • The nuclear option. Nothing gets through unless you explicitly override it.

I chose “Don’t allow”.

Next time I tried to cast Netflix to my TV, Chrome asked:

“Netflix.com wants to find and connect to devices on your local network – Allow or Block?”

I clicked Allow, ticked “Remember this decision”, and that was it.
Netflix works. Nothing else gets a free pass.

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Why You Should Care (Even If You Don’t Own a Printer)

This isn’t just about stopping weird printer parties.

Locking down local network access helps with:

• 🔒 Router security
  Stops shady sites checking your router model and firmware for known bugs.
• 🖨️ Protecting smart devices
  Makes it harder for malware to pull your printer, NAS or smart camera into a botnet.
• 🕵️ Less tracking
  Websites can’t use your “device fingerprint” (which gadgets you have) as easily to track you.
• 🧠 Peace of mind
  No more “why did the printer just wake up?” at midnight.

If a site genuinely needs access (Netflix, YouTube casting, local web apps, etc.), you’ll see a clear permission box. You’re in charge, not the ad network.

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When to Click “Allow” (and When to Hit “Block”)

Reasonable times to Allow:

• Streaming services you recognise (Netflix, Disney+, YouTube) when you’re trying to cast.
• Local web dashboards you opened on purpose (e.g. your router admin page or a home server).
• Official pages for devices on your network (printer setup portals, TV web control pages).

Times to Block without thinking:

• A random blog or news site suddenly wants to “find devices on your local network”.
• A page you landed on from a sketchy advert or spam email.
• Any site where you’re not actively trying to cast, connect or configure something.

If you ever click Allow by mistake:

1. Go back to chrome://settings/content/localNetworkAccess.
2. Scroll down to Allowed sites.
3. Remove the one you don’t trust.

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Final Thought: Lock the Digital Front Door

Modern browsers do a lot, and most of the time we’re not even aware of it.
Chrome’s local network controls finally give us a big red NO button for our own homes.

• It takes less than a minute to set up.
• It stops random sites from poking your printer, router and other gadgets.
• It makes your network that bit less interesting to attackers.

If you’ve got even one smart device on your Wi-Fi – a printer, a TV, an Alexa, anything – go flip that setting now.

It genuinely takes longer to boil the kettle than it does to lock this stuff down.

Stay safe (and enjoy the silence from the printer).