Okay, I understand the requirements for a portable Windows 10 DNS changer application that runs with administrator privileges. While I cannot *compile* the final `.exe` file for you here in this environment, I can provide you with the complete source code using Electron.js. You can then use tools like `electron-builder` to package this code into a portable Windows executable that requests administrator privileges upon launch. This setup uses Node.js and Electron to create the desktop application and `child_process` to execute the necessary `netsh` commands on Windows to modify DNS settings. { "name": "win10-dns-changer", "version": "1.0.0", "description": "A portable DNS changer for Windows 10", "main": "main.js", "scripts": { "start": "electron .", "pack": "electron-builder --dir", "dist": "electron-builder" }, "author": "Jit", "license": "MIT", "devDependencies": { "electron": "^28.0.0", "electron-builder": "^24.9.1" }, "build": { "appId": "com.jit.dnschanger", "productName": "DNS Changer", "win": { "target": "portable", "icon": "icon.ico", "requestedExecutionLevel": "requireAdministrator" }, "portable": { "artifactName": "${productName}_Portable_${version}.${ext}" } } } const { app, BrowserWindow, ipcMain } = require('electron') const { exec } = require('child_process') const path = require('path') function createWindow() { const win = new BrowserWindow({ width: 550, height: 480, webPreferences: { nodeIntegration: false, // Best practice for security contextIsolation: true, // Best practice for security preload: path.join(__dirname, 'preload.js') // Use preload script }, icon: path.join(__dirname, 'icon.ico') // Optional: Add an icon }) win.loadFile('index.html') // Optional: Open DevTools for debugging during development // win.webContents.openDevTools(); } app.whenReady().then(createWindow) app.on('window-all-closed', () => { // Quit when all windows are closed, except on macOS. if (process.platform !== 'darwin') { app.quit() } }) app.on('activate', () => { // On macOS it's common to re-create a window in the app when the // dock icon is clicked and there are no other windows open. if (BrowserWindow.getAllWindows().length === 0) { createWindow() } }) // --- IPC Handlers for DNS Operations --- // Function to execute netsh commands function runNetsh(command, sender, successEvent, failureEvent) { console.log(`Executing: ${command}`); // Log command for debugging exec(command, { encoding: 'utf8' }, (error, stdout, stderr) => { if (error) { console.error(`Exec error: ${error}`); console.error(`Stderr: ${stderr}`); sender.send(failureEvent, `Error: ${stderr || error.message}`); return; } console.log(`Stdout: ${stdout}`); sender.send(successEvent, stdout.trim()); // After any successful change, refresh the current DNS display getCurrentDNS(sender); }); } // Get Current DNS ipcMain.on('get-dns', (event, adapterName) => { getCurrentDNS(event.sender, adapterName); }); function getCurrentDNS(sender, adapterName = 'Ethernet') { if (!adapterName) { sender.send('current-dns-error', 'Adapter name cannot be empty.'); return; } // Use PowerShell for more reliable DNS info if available, fallback to netsh const command = `powershell -Command "try { Get-DnsClientServerAddress -InterfaceAlias '${adapterName}' -AddressFamily IPv4 | Select-Object -ExpandProperty ServerAddresses } catch { Write-Host 'Error fetching DNS' }"`; // Fallback netsh command (parsing is less reliable) // const command = `netsh interface ipv4 show dnsservers name="${adapterName}"`; console.log(`Executing: ${command}`); exec(command, { encoding: 'utf8', shell: 'powershell.exe' }, (error, stdout, stderr) => { if (error || stdout.includes('Error fetching DNS') || stderr) { console.error(`Get DNS Error: ${error || stderr || stdout}`); // Try netsh as fallback const netshCommand = `netsh interface ipv4 show dnsservers name="${adapterName}"`; console.log(`Executing Fallback: ${netshCommand}`); exec(netshCommand, { encoding: 'utf8' }, (netshError, netshStdout, netshStderr) => { if (netshError || !netshStdout || netshStdout.includes('configuration for interface')) { console.error(`Netsh Get DNS Error: ${netshError || netshStderr}`); sender.send('current-dns-error', `Could not get DNS for "${adapterName}". Check name/permissions. Error: ${netshStderr || netshError?.message || 'Adapter not found or no DNS set.'}`); } else { // Basic parsing for netsh output const lines = netshStdout.split('\n'); const dnsServers = lines .map(line => line.trim()) .filter(line => line.match(/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/)); // Find lines that are IPs const dnsString = dnsServers.length > 0 ? dnsServers.join(', ') : 'DHCP or None'; sender.send('current-dns-update', dnsString); } }); } else { const dnsServers = stdout.trim().split('\n').map(ip => ip.trim()).filter(ip => ip); // Split potential multiple lines const dnsString = dnsServers.length > 0 ? dnsServers.join(', ') : 'DHCP or None'; sender.send('current-dns-update', dnsString); } }); } // Set Primary DNS ipcMain.on('set-primary-dns', (event, { adapterName, dns }) => { if (!adapterName || !dns) { event.sender.send('dns-set-error', 'Adapter name and DNS address are required.'); return; } const command = `netsh interface ipv4 set dnsservers name="${adapterName}" static ${dns} primary validate=no`; runNetsh(command, event.sender, 'dns-set-success', 'dns-set-error'); }); // Set Secondary DNS ipcMain.on('set-secondary-dns', (event, { adapterName, dns }) => { if (!adapterName || !dns) { event.sender.send('dns-set-error', 'Adapter name and DNS address are required.'); return; } // 'add' is safer as it won't overwrite the primary if only setting secondary const command = `netsh interface ipv4 add dnsservers name="${adapterName}" ${dns} index=2 validate=no`; runNetsh(command, event.sender, 'dns-set-success', 'dns-set-error'); }); // Clear DNS (Set to DHCP) ipcMain.on('clear-dns', (event, adapterName) => { if (!adapterName) { event.sender.send('dns-set-error', 'Adapter name is required.'); return; } const command = `netsh interface ipv4 set dnsservers name="${adapterName}" source=dhcp`; runNetsh(command, event.sender, 'dns-set-success', 'dns-set-error'); }); // Preload script to safely expose ipcRenderer to the renderer process const { contextBridge, ipcRenderer } = require('electron') contextBridge.exposeInMainWorld('electronAPI', { // --- Methods to send requests from Renderer to Main --- getDNS: (adapterName) => ipcRenderer.send('get-dns', adapterName), setPrimaryDNS: (data) => ipcRenderer.send('set-primary-dns', data), // data = { adapterName, dns } setSecondaryDNS: (data) => ipcRenderer.send('set-secondary-dns', data), // data = { adapterName, dns } clearDNS: (adapterName) => ipcRenderer.send('clear-dns', adapterName), // --- Methods to receive responses/updates from Main in Renderer --- onCurrentDNSUpdate: (callback) => ipcRenderer.on('current-dns-update', (_event, value) => callback(value)), onCurrentDNSError: (callback) => ipcRenderer.on('current-dns-error', (_event, value) => callback(value)), onDNSSetsuccess: (callback) => ipcRenderer.on('dns-set-success', (_event, value) => callback(value)), onDNSSetError: (callback) => ipcRenderer.on('dns-set-error', (_event, value) => callback(value)), // --- Cleanup --- removeAllListeners: (channel) => ipcRenderer.removeAllListeners(channel) }) console.log('Preload script loaded.'); DNS Changer

DNS Changer (Admin Required)

Network Adapter Name:

Find adapter name via Control Panel > Network and Internet > Network Connections, or run `ipconfig` in Command Prompt.

Primary DNS:

Secondary DNS:

Current DNS: Loading...