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LAN port scan forbidder in Chrome with OffiDocs

LAN port scan forbidder  screen for extension Chrome web store in OffiDocs Chromium

LAN port scan forbidder Chrome web store extension



Run the Chrome online web store extension LAN port scan forbidder using OffiDocs Chromium online.

Forbid untrusted web to scan localhost or LAN.

## Source Code Repo https://github.

com/garywill/LAN-port-scan-forbidder ## What Webs can try to fetch `` or `192.168.Y.

Z:xxxx` to scan your open ports in LAN.

Although browsers have cross-domain protections, webs can't read response contents, **but** can still see the connection succeeds or fails.

There're already reports that some websites using that as tracking fingerprint.

> A web for testing: http://samy.

pl/webscan/ ## So Forbid any website behaviors trying to connect to your LAN or localhost, if user is visiting the website via their domains or public IP addresses.

(Read the source code `background.

js` to see the logic) > Using JS library [whitequark/ipaddr.



js) (MIT License) v2.0.0 to judge IP range.

### Fallback operation If user find a web broken, user can temporary set this addon disabled via toolbar button for: - this one tab - this one tab and new tabs opened by this tab - this one window (Firefox only) - globally (above can be set as keyboard shortcuts) there's showy toolbar button badge indicating disabling status.

## Cases when web LAN scan is properly used Not all LAN-port-scan are evil.

- Some manufacturers provide web for user's browser to scan LAN for their product that need updating.

- Some softwares use `` communication to interact between native program and web.

Additional Information:

- Offered by Garywill
- Average rating : 0 stars (hated it)
- Developer This email address is being protected from spambots. You need JavaScript enabled to view it.

LAN port scan forbidder web extension integrated with the OffiDocs Chromium online

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