OPi-one - Network-Wide Privacy Protection
A plug-in device that blocks ads and trackers for your entire home
FREE
What is OPi-one?
OPi-one is a privacy device by Guard Hero that runs on a Raspberry Pi 4. Once set up, it automatically blocks ads, trackers, and unwanted content for every device in your home - no extra software needed on your phone, TV, or laptop.
Write the software to a memory card, plug it in, and your whole network is protected. Phones, smart TVs, and any other connected device are all covered instantly.
Everything is pre-configured and ready to go - just download, set up, and start blocking. Built for Raspberry Pi 4.
See OPi-one Block Ads Across Your Entire Network
One Raspberry Pi 4. Every device in your home protected — phones, TVs, tablets, smart home gadgets — all at once.
How does OPi-one block ads network-wide?
Ready Out of the Box
Everything comes pre-configured. No technical setup or coding required.
Blocks Ads & Trackers
Automatically stops ads and tracking across your entire home network.
Easy-to-Use Dashboard
A simple web page lets you see what's being blocked and adjust settings.
Smart Threat Detection
Intelligently identifies and blocks new threats, even ones that aren't on standard lists.
Whole-Home Coverage
Protects every device on your network - phones, tablets, smart TVs, and more.
Completely Private
Everything runs on your own device at home. Your data never leaves your network.
What hardware do I need to run OPi-one?
| Specification | Value |
|---|---|
| Hardware | Raspberry Pi 4 (2GB, 4GB, or 8GB) |
| SD Card | 16GB minimum (Class 10 / A1 or faster) |
| Network | Ethernet connection required |
| Image Size | 100MB (compressed zip) |
| Flash Tool | Balena Etcher or Raspberry Pi Imager |
| Skills Required | Basic networking (setting router DNS) |
| Included Software | OpenWRT + Pi-hole + Guard Hero UI pre-configured |
| Compatible Hardware | Raspberry Pi 4 only |
How do I set up OPi-one?
Our step-by-step guide walks you through everything — from writing the software to your memory card, to finding your device on the network, to routing your home's traffic through OPi-one.
View Setup GuideTakes about 15 minutes
Frequently Asked Questions About OPi-one
Does OPi-one work with any router?
Yes. OPi-one works with any router that lets you change the DNS server in its admin panel. You point your router's DNS to the Pi's IP address, and all devices on the network are automatically protected.
How long does OPi-one take to set up?
Most users complete setup in under 15 minutes: approximately 10 minutes to flash the 100MB image to an SD card and 5 minutes to update the router DNS setting.
What percentage of ads does OPi-one block by default?
OPi-one uses Pi-hole's DNS-level blocking, which blocks 10–30% of DNS queries on a typical home network with the default blocklist. Enabling additional community blocklists can raise this to 50% or more.
Does OPi-one require a cloud connection to work?
No. All blocking happens 100% locally on your Raspberry Pi 4. OPi-one works without an internet connection for its core blocking features. Blocklist updates do require internet access.
Can OPi-one protect phones and smart TVs?
Yes. Because OPi-one operates at the DNS level on your router, every device on your network is protected - phones, tablets, smart TVs, gaming consoles, and IoT devices - without installing any software on them.
Ready to Take Control of Your Network?
Get the OPi-one image and start blocking ads and trackers network-wide.
Guard Hero is privacy-first. We never collect or sell your data. Read our Privacy Policy.