ProtonVPN — Swiss Privacy Guards Your Digital Freedom

Download the protonvpn client for your device from the official website and follow these steps:

1. Visit the protonvpn official download page (/download/), select the client version for your operating system (Windows/macOS/Linux/Android/iOS).
2. Click the "Free Download" button. The system automatically starts downloading the installation package (~45MB).
3. After download, double-click the installer. Windows users run as administrator; macOS users drag to Applications folder.
4. Follow the installation wizard. Choose whether to create desktop shortcuts and enable auto-start on boot.
5. Launch ProtonVPN after installation. Log in with your Proton account or register a free account directly in the client.
6. After login, the client auto-connects to the optimal server. You can also manually select country and node to start secure browsing.

proton vpn offers multiple flexible connection methods for different scenarios:

1. Open the ProtonVPN client. The power button on the main interface is the Quick Connect entry. Click it for automatic assignment of the lowest-latency, optimal-load server.
2. For manual selection, click the "Servers" tab. All 112 countries' nodes are grouped by region, each showing real-time latency and load percentage.
3. Use the search bar to filter by country or city name. You can also click target countries directly on the map view to initiate connection.
4. After connection, the main interface shows current server info, encryption protocol, upload/download speeds, and cumulative data transferred. Green status means protection is active.
5. To switch nodes, simply click a new server without disconnecting first. Seamless switching completes within 2 seconds without interrupting your current session.
6. After disconnection, Kill Switch activates and cuts all traffic to prevent real IP leaks. Network automatically restores when VPN reconnects.

Choose the most suitable proton vpn server based on your specific use case:

1. Daily browsing & social media: Select servers under the "Fast" category. System sorts by latency, prioritize green-marked low-load nodes (under 50%).
2. Video streaming: Switch to "Streaming" category. These servers are optimized for Netflix, Disney+ etc. Choose nodes matching your target content region for 4K playback.
3. High-security needs: Select "Secure Core" labeled nodes. Traffic routes through Switzerland/Iceland/Switzerland first, then to target server. Double encryption provides maximum privacy.
4. P2P file sharing: Select "P2P" tagged servers. These nodes are optimized for high-traffic transfers and located in countries with permissive P2P laws.
5. Gaming acceleration: Choose the geographically closest low-load node. Under WireGuard protocol, latency is typically under 20ms. Avoid cross-continental nodes to minimize physical delay.
6. When unsure, use the "Fastest" button or let Smart Protocol Selection auto-match the optimal node. The system综合考虑 latency, load and protocol compatibility.

protonvpn Secure Core is an industry-unique double VPN feature. Usage steps:

1. Open the ProtonVPN client and go to the server list. Secure Core nodes are marked with a shield icon, located in Switzerland, Iceland and Sweden.
2. Select a Secure Core exit node (final destination server), e.g., "US Secure Core". Your traffic first encrypts through Switzerland, then reaches the US node.
3. After clicking connect, the client establishes two encrypted tunnels: first from your device to Swiss entry server (AES-256), second from Switzerland to target country (AES-256 again).
4. After connection, target websites see the IP of the final exit server. Your ISP only sees encrypted communication with Switzerland, completely unaware of your final destination.
5. Under Secure Core mode, choose WireGuard protocol for best performance. Double encryption adds ~5-10ms latency but significantly improves security for sensitive data scenarios.
6. To exit Secure Core, simply switch to a regular server. The client automatically disconnects the double tunnel and establishes a single-hop connection without manual operation.

proton vpn covers mainstream operating systems and device types for comprehensive protection:

1. Windows: Supports Windows 10/11 (64-bit) with native client. Supports WireGuard, OpenVPN, IKEv2 protocols. System tray quick actions.
2. macOS: Supports macOS 11+, native Apple Silicon (M1/M2/M3) and Intel chips. Menu bar quick connect, Split Tunneling support.
3. Linux: DEB (Ubuntu/Debian) and RPM (Fedora/CentOS) packages available. Also provides command-line tool protonvpn-cli for servers and desktops.
4. Android: Supports Android 8.0+, available on Google Play and APK. Material Design interface, background persistence and Always-On VPN.
5. iOS: Supports iOS 15+, universal for iPhone and iPad. Swift native development, Widget quick connect and Siri voice control.
6. Routers & IoT: OpenVPN/WireGuard config files available for manual import to VPN-capable routers (ASUS, TP-Link). Whole-home device protection. Single account connects up to 10 devices.

When encountering protonvpn connection problems, follow these troubleshooting steps:

1. Check basic network: Confirm device is connected to internet. Try accessing any website in browser. If internet doesn't work without VPN, the issue is local network, not VPN.
2. Switch server nodes: Current server may be temporarily overloaded or under maintenance. Select another node in the same country, or switch to a different country to test.
3. Change VPN protocol: In client settings, switch protocol (WireGuard → OpenVPN → IKEv2). Different network environments have varying protocol compatibility. WireGuard is fastest but may be restricted by some firewalls.
4. Clear DNS cache: Windows run "ipconfig /flushdns", macOS run "sudo dscacheutil -flushcache". Residual DNS cache may prevent domain resolution after connection.
5. Check firewall & antivirus: Some third-party firewalls or antivirus may block VPN connections. Temporarily disable to test. If confirmed, add ProtonVPN to whitelist.
6. Restart client & device: Fully quit ProtonVPN process (including background services), restart. If unresolved, restart router and device. Persistent issues: contact protonvpn official support.