LAN port scan forbidder क्या है?

LAN port scan forbidder https://garywill.github.io द्वारा विकसित एक क्रोम एक्सटेंशन है, और इसकी मुख्य विशेषता है "Forbid non-LAN web to access LAN"।

एक्सटेंशन स्क्रीनशॉट्स

एक्सएक्स एक्सटेंशन CRX फ़ाइल डाउनलोड करें

crx प्रारूप में LAN port scan forbidder एक्सटेंशन फ़ाइलें डाउनलोड करें, ब्राउज़र में क्रोम एक्सटेंशन को मैन्युअल रूप से स्थापित करें या दोस्तों के साथ crx फ़ाइलों को साझा करें ताकि क्रोम एक्सटेंशन को आसानी से स्थापित किया जा सके।

एक्सटेंशन उपयोग निर्देश

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!

एक्सटेंशन की मूल जानकारी

नाम	LAN port scan forbidder
ID	lapppchpconamefemlnjdebbcpbncafl
आधिकारिक URL	https://chromewebstore.google.com/detail/lan-port-scan-forbidder/lapppchpconamefemlnjdebbcpbncafl
विवरण	Forbid non-LAN web to access LAN
फ़ाइल का आकार	35.41 KB
स्थापना संख्या	310
वर्तमान संस्करण	0.6.1
अंतिम अपडेट	2023-11-09
प्रकाशन तिथि	2021-12-25
डेवलपर	https://garywill.github.io
ईमेल	[email protected]
भुगतान के प्रकार	free
एक्सटेंशन वेबसाइट	https://github.com/garywill/LAN-port-scan-forbidder
सहायता पृष्ठ URL	https://github.com/garywill/LAN-port-scan-forbidder
गोपनीयता नीति पृष्ठ URL	https://github.com/garywill/garywill/blob/privacy_policy/README.md
समर्थित भाषाएँ	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" } }