What is Rematrix Gallery?

A Raspberry Pi-powered WiFi network that hijacks captive portals to let strangers anonymously share media like art, videos, and music.

How do you set up a local media sharing network like this?

Flash the provided img.gz to a microSD, boot Pi Zero 2W, connect devices to its WiFi — portal pops automatically.

Is hijacking captive portals legal?

Fine on your own hardware; dicey on public networks — could be trespassing.

📦 Open Source

Hijacking Captive Portals for Stranger's Art Drops

Ever connect to free WiFi and get that login nag? One hacker flipped it into a local art-sharing playground. Genius or gimmick?

theAIcatchup Apr 10, 2026 4 min read

Raspberry Pi Zero running Rematrix Gallery, displaying glitchy matrix-style media sharing interface

⚡ Key Takeaways

Hijacks OS-specific connectivity checks with dnsmasq and FastAPI for instant captive portal takeover. 𝕏
Anonymous media sharing via device IDs — no accounts, pure WiFi magic on Raspberry Pi. 𝕏
Vanilla web stack proves you don't need frameworks for quirky, cross-device apps. 𝕏

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theAIcatchup

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#FastAPI #captive portals #local media sharing #local network #local sharing #local wifi sharing #raspberry pi projects #raspberry-pi #rematrix gallery #wifi hack #wifi hacking

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Originally reported by dev.to

⚡ Key Takeaways

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