This may be due to maintenance being performed in your area, poor reception (if using a mobile connection), a technical problem, or a problem with your account.

There is a problem with your internet service provider (ISP) Restarting your PC can also fix many connection problems. If that fails, try resetting your router (turn it off, wait at least 10 seconds, then turn it on again). There is a problem with your WiFi connection Please note that VPN connections from China are not possible using Proton VPN. Smart protocol will automatically cycle through all available VPN protocols (OpenVPN UDP, OpenVPN TCP, and WireGuard ® in Windows) to try to establish a connection. Using OpenVPN in TCP mode can be an effective way to bypass censorship, although it will not defeat advanced deep packet inspection techniques. This routes connections through third-party networks that may not be blocked. Using our alternative routing feature.If you live in a restrictive country then your connection may be blocked by your government. Your connection is blocked by your ISP or government

If you cannot connect to our VPN servers using our Windows app, you will see this troubleshooting message.Īs this message suggests, there are a number of possible reasons for the problem.

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