RadPING

A modern, cross-platform RADIUS test client.
Send authentication and accounting requests, and read back every attribute in the reply — decoded, not as raw hex.

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RadPING is a spiritual successor to MasterSoft's NTRadPing — the classic, Windows-only RADIUS test utility from the early 2000s. It does the same job with a clean, modern interface and runs natively on macOS, Windows, and Linux.

Point it at a RADIUS server, build a request, and inspect the response code and every returned attribute, decoded by name and type.

Status: early and actively developed (v0.1). Authentication and accounting requests work today — see the roadmap.

Features

• Authentication requests — Access-Request with PAP or CHAP, including correct User-Password hiding and CHAP-Challenge handling (RFC 2865).
• Accounting requests — Accounting-Request for Start, Stop, Interim-Update, On, and Off (RFC 2866), with a valid request authenticator.
• Response validation — verifies the Response Authenticator and flags a mismatched shared secret.
• Decoded replies — every attribute shown by name and type in a clean table, with round-trip time and the raw packet bytes one click away.
• Vendor-Specific Attributes — attribute 26 is unpacked into its vendor sub-attributes. Built-in support for Cisco, Microsoft, MikroTik, Aruba, Fortinet, Juniper, and WISPr; unknown vendors still decode structurally instead of as one opaque hex blob.
• Custom dictionaries — import standard FreeRADIUS dictionary files to name and type Vendor-Specific Attributes from any vendor. Imports persist across launches.
• Server profiles — save connection details (host, port, secret, timeout, retries) per server and reload them from a dropdown. Shared secrets are encrypted at rest with the OS keychain (Keychain / DPAPI / libsecret).
• Free-form attributes — add any standard attribute to a request from a built-in RFC 2865/2866 dictionary, with named enum values.
• Update notifications — on launch, RadPING checks GitHub Releases and shows an unobtrusive prompt when a newer version is available. It never downloads or installs anything on its own — clicking it just opens the Releases page.

Getting started

Download

Grab the latest build from the Releases page, or build from source below.

Build from source

Requires Node.js 18 or newer.

git clone https://github.com/MooseTheCoder/RadPING.git
cd RadPING
npm install
npm start

Package installers

npm run dist:mac           # .dmg + .zip (drag-to-run app)
npm run dist:win           # NSIS installer + portable folder (.zip) + portable .exe
npm run dist:win:portable  # portable folder (.zip) only
npm run dist:linux         # AppImage (portable) + .deb

Portable on Windows

There are two portable shapes, for different needs:

• Portable folder (.zip) — recommended. An unpacked app folder containing a real, permanent RadPING.exe. Extract it anywhere (USB stick, network share), run RadPING.exe, and you can pin it to the taskbar and it re-opens reliably. To keep settings inside the folder, drop an empty file named portable.txt next to RadPING.exe; RadPING then stores profiles and dictionaries in a RadPING-data subfolder instead of %APPDATA%.
• Portable .exe. A single self-extracting file — convenient to hand around, and it stores its data next to itself automatically. Note it unpacks and runs from a temporary folder, so it is not suitable for pinning to the taskbar (Windows would pin the temporary path). Use the portable folder for that.

The Linux AppImage and the macOS .zip are portable in the same spirit.

Usage

1. Enter the RADIUS server, port (1812 for authentication, 1813 for accounting), and shared secret.
2. Choose a request type. For authentication, pick PAP or CHAP and enter a username and password.
3. Add any additional attributes you need (e.g. NAS-IP-Address, Service-Type). Accounting requests usually also need Acct-Session-Id.
4. Click Send Request and read the result: a colour-coded status (Accept / Reject / Challenge), the returned attributes, and — if you want it — the raw request/response hex.

Save a connection as a profile to reuse it later, and open Dictionaries to import vendor dictionaries for richer Vendor-Specific Attribute decoding.

Supported RADIUS

Capability	Status
Access-Request — PAP	Supported
Access-Request — CHAP	Supported
Accounting-Request — Start / Stop / Interim / On / Off	Supported
Response Authenticator validation	Supported
Standard attributes (RFC 2865 / 2866)	Supported
Vendor-Specific Attribute decoding	Supported
Custom FreeRADIUS dictionaries	Supported
EAP / Message-Authenticator	Planned
Sending Vendor-Specific Attributes	Planned

Development

There is no bundler and no build step for the app itself: the renderer is plain HTML/CSS/JS, and all networking (UDP sockets, MD5, packet encode/decode) lives in the Electron main process, reached from the sandboxed renderer over a narrow contextIsolation bridge.

Run the test suites (plain Node, no framework, no Electron required):

npm test

electron/     Electron main process, IPC handlers, preload bridge
src/radius/   RADIUS protocol — dictionary, vendors, packet, client, dictparser
src/store/    persisted server profiles and imported dictionaries
renderer/     the UI (index.html, styles.css, app.js)
assets/       application icon
test/         plain-Node test suites

Roadmap

• Full request templates (username + attributes) built on server profiles
• EAP and Message-Authenticator support
• Sending Vendor-Specific Attributes (a VSA editor)
• Named enum values for vendor integer attributes in decoded replies
• Request history and repeat

Contributing

Issues and pull requests are welcome. For substantial changes, please open an issue first to discuss the direction, and run npm test before submitting.

License

RadPING is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License v3.0 (or, at your option, any later version) as published by the Free Software Foundation.

See LICENSE for the full text.

Credits

Inspired by MasterSoft's original NTRadPing. RadPING is an independent project and is not affiliated with or endorsed by MasterSoft.

AI Disclosure

Project built using Claude Code.