init

app.js

+const radius = require('radius');
+const dgram = require('dgram');
+
+const secret = 'secret'; // Replace with your shared secret
+const port = 1812; // Default RADIUS authentication port
+
+const server = dgram.createSocket('udp4');
+
+server.on('message', (msg, rinfo) => {
+    const packet = radius.decode({ packet: msg, secret });
+
+    if (packet.code !== 'Access-Request') {
+        console.error('Invalid packet type: ' + packet.code);
+        return;
+    }
+
+    const username = packet.attributes['User-Name'];
+    const password = packet.attributes['User-Password'];
+
+    console.log('Received access request from:', username);
+
+    // Perform your user authentication logic here
+    const isAuthenticated = authenticateUser(username, password);
+
+    let response;
+    if (isAuthenticated) {
+        response = radius.encode_response({
+            packet,
+            code: 'Access-Accept',
+            secret,
+        });
+        console.log('Access granted for:', username);
+    } else {
+        response = radius.encode_response({
+            packet,
+            code: 'Access-Reject',
+            secret,
+        });
+        console.log('Access denied for:', username);
+    }
+
+    server.send(response, 0, response.length, rinfo.port, rinfo.address);
+});
+
+server.on('listening', () => {
+    const address = server.address();
+    console.log('RADIUS server listening on port', address.port);
+});
+
+server.bind(port);
+
+function authenticateUser(username, password) {
+    // Replace this function with your actual authentication logic
+    return username === 'ali' && password === 'ali';
+}

package.json

+{
+  "name": "untitled28",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "radius": "^1.1.4"
+  }
+}