Τι είναι το LAN port scan forbidder;

Το LAN port scan forbidder είναι ένα πρόσθετο Chrome που αναπτύχθηκε από τον https://garywill.github.io, και η κύρια λειτουργία του είναι "Forbid non-LAN web to access LAN".

Στιγμιότυπα Επέκτασης

Λήψη αρχείου CRX της επέκτασης LAN port scan forbidder

Λήψη αρχείων επέκτασης LAN port scan forbidder σε μορφή crx, εγκατάσταση των επεκτάσεων Chrome μη αυτόματα στον περιηγητή ή κοινοποίηση των αρχείων crx με φίλους για εύκολη εγκατάσταση των επεκτάσεων Chrome.

Οδηγίες Χρήσης της Επέκτασης

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 `127.0.0.1:xxxx` 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](https://github.com/whitequark/ipaddr.js) (MIT License) v2.0.0 to judge IP range.

### Notification

User can enable notification. When untrusted web tries to access private network and get blocked, will show up notification.

### 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 `127.0.0.1` communication to interact between native program and web.

## Disclaimer

This open souce addon comes with no warranty. Use on you own risk!

Βασικές Πληροφορίες Επέκτασης

Όνομα	LAN port scan forbidder
ID	lapppchpconamefemlnjdebbcpbncafl
Επίσημο URL	https://chromewebstore.google.com/detail/lan-port-scan-forbidder/lapppchpconamefemlnjdebbcpbncafl
Περιγραφή	Forbid non-LAN web to access LAN
Μέγεθος Αρχείου	35.41 KB
Αριθμός Εγκαταστάσεων	310
Τρέχουσα Έκδοση	0.6.1
Τελευταία Ενημέρωση	2023-11-09
Ημερομηνία Δημοσίευσης	2021-12-25
Προγραμματιστής	https://garywill.github.io
Ηλεκτρονικό ταχυδρομείο	[email protected]
Τύπος Πληρωμής	free
Ιστότοπος Επέκτασης	https://github.com/garywill/LAN-port-scan-forbidder
Διεύθυνση URL της Σελίδας Βοήθειας	https://github.com/garywill/LAN-port-scan-forbidder
URL της Σελίδας Πολιτικής Απορρήτου	https://github.com/garywill/garywill/blob/privacy_policy/README.md
Υποστηριζόμενες Γλώσσες	en
manifest.json
{ "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx", "name": "LAN port scan forbidder", "description": "Forbid non-LAN web to access LAN", "manifest_version": 2, "version": "0.6.1", "homepage_url": "https:\/\/github.com\/garywill\/LAN-port-scan-forbidder\/", "author": { "name": "Garywill", "url": "https:\/\/garywill.github.io" }, "permissions": [ "webRequest", "webRequestBlocking", ":\/\/\/", "ws:\/\/\/", "wss:\/\/\/", "ftp:\/\/\/*", "contextMenus", "storage" ], "optional_permissions": [ "notifications" ], "icons": { "128": "icon.png" }, "background": { "page": "background.html" }, "browser_action": { "default_icon": "icon_gray.png", "default_title": "LAN port scan forbidder" }, "commands": { "_execute_browser_action": { "description": "Click toolbar button" }, "toggle_t": { "description": "Toggle for one tab" }, "toggle_h": { "description": "Toggle for one tab and new tabs opened by it" }, "toggle_global": { "description": "Toggle globally enable\/disable" } }, "options_ui": { "page": "options.html" } }