local network probe
What can a browser tab see
on the network you're sitting on?
Run a live scan and watch your local IP, your subnet, and the devices answering on it get mapped out in real time — using nothing but standard browser APIs. This is the same class of technique a malicious ad script could run the moment you open a page.
what this does
Degram uses WebRTC ICE gathering to surface your local IP, then times connection attempts across your subnet and a set of common local service ports — the same primitives real fingerprinting and network-mapping scripts rely on.
what it needs from you
One click. No login, no download, no camera or mic access. Every
probe uses ordinary fetch, Image, and
RTCPeerConnection calls — nothing your browser
wouldn't already let a page attempt.
subnet sweep — one cell per possible host
findings
What this page learned about your network
local ip
subnet
hosts responding
connection type
.local hostname. That's a real protection working in your favor, and it's why some fields above may be limited.
Common local service ports
Probed via timed HTTP requests — no-cors, timing-only. Closed/filtered calls are inferred from timing, not confirmed.
Nothing above was sent anywhere. Reload the page and it's gone — that's also exactly what makes this technique easy for a throwaway ad script to use quietly, once, and never again.