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VPN 无法运行时该怎么办？

milan97
2018年7月22日

Though VPNs tend to be very helpful, they at times experience problems. When this happens, a VPN may not work correctly. This may lead to internet security and privacy risks as you might no longer be protected.

VPN 问题可能导致根本无法连接，或者导致 VPN 体验变慢，从而使浏览变得困难。虽然 VPN 会略微降低浏览速度，但如果速度极慢，就需要采取行动。

当 VPN 无法正常工作时该怎么办？

改用付费 VPN

Free VPNs are prone to experiencing problems which lead to slow browsing speeds and even disconnects. This is because users share the same resources such as servers and sometimes an overload/congestion may occur. Paid VPNs don’t experience congestion problems as customers get the value of their money. If you are using a free VPN, I highly recommend an upgrade to a premium VPN. If you are using a paid VPN and still experiencing problems, proceed as follows;

更改服务器位置

If you are experiencing slow connections, changing a VPN’s server location can make a lot of difference. The closer you are to a server, the higher the speeds you will get. Servers that are not congested too much also have high speeds. To change your server location, open the server list and select a closer server. Most VPNs show server latency, and this is your guide when choosing servers based on proximity. The lesser the latency value, the closer the server is.

Change the VPN Protocols

VPN 使用协议将你连接到互联网，这些协议决定了连接的方式，包括速度。最常用的协议是OpenVPN。VPN 通过 UDP（用户数据报协议）或 TCP（传输控制协议）使用该协议。TCP 具有纠错功能，只要出现问题，就会进行重传。这使得 OpenVPN TCP 运行速度较慢。另一方面，UDP 不提供纠错功能，因此速度比 TCP 快。当遇到速度较低时，请改用OpenVPN UDP。

确保使用正确的登录凭证

输入错误的电子邮件/用户名或密码将导致验证错误。有必要重新检查用户名和密码，以避免出现此错误。

确保 VPN 客户端和提供商在线

Overlooking the simple things is the easiest way to ignore mistakes. Test whether you are online by opening any web without a connection through a VPN. If you are not connected, reboot your router and try again. Then check whether your VPN provider is online. VPN servers go offline once in a while for maintenance.

更改连接端口

Some networks and ISPs tend to block the internet traffic on specific ports. This means that your VPN connection won’t go through such a port. It’s therefore recommended to try a connection through a different port.

修复不断崩溃的 VPN 应用程序

At times VPN apps can crash or freeze unexpectedly now and then. This can lead to privacy and security breaches. This problem can be hard to troubleshoot, but worry not, here’s what you can do;