How Does VPN Work?

A VPN works by creating a secure tunnel between your device and a VPN server. This process is often called tunneling. When you browse the internet without a VPN, your traffic usually goes directly through your internet service provider. With a VPN, your traffic first passes through an encrypted VPN tunnel.

This means websites may see the VPN server IP address instead of your original IP address. Your internet provider may still know that you are connected to a VPN server, but the contents of your encrypted VPN traffic are harder to inspect.

Basic VPN connection flow

1. Your device connects to a VPN server.
2. The VPN app or configuration creates an encrypted tunnel.
3. Your internet traffic travels through that tunnel.
4. The VPN server forwards the request to the destination website or service.
5. The response returns through the VPN server and back to your device.

What changes when you use a VPN?

• Your visible IP address can become the VPN server IP address.
• Your traffic is protected inside an encrypted tunnel.
• Public Wi-Fi browsing becomes safer than using an open connection without protection.
• Your connection route may change depending on the VPN server location.

Common VPN protocols

PPTP

PPTP is one of the oldest VPN protocols. It is easy to configure and supported by many devices, but it is generally considered weaker than modern VPN protocols. It may still be useful for basic compatibility, but users who need stronger security should consider newer options.

L2TP

L2TP is commonly available on many operating systems and is often used together with IPsec. It is easy to configure on Windows, Android, iOS, and other platforms. It can provide better protection than PPTP, although speed and compatibility may vary by network.

OpenVPN

OpenVPN is widely used because it offers strong security and flexible configuration. It usually requires a separate app or configuration file, but it is a popular choice for users who want a stable and secure VPN connection.

Shadowsocks

Shadowsocks is a secure proxy technology often used to bypass network restrictions and improve connection flexibility. It is not the same as a traditional VPN, but it can serve a similar purpose for routing traffic through a remote server.

Does VPN affect speed?

A VPN can affect speed because traffic travels through an extra server and encryption adds processing overhead. The actual speed depends on the protocol, server load, distance to the server, internet provider, and device performance.

Choosing the right VPN server

For better performance, choose a server location close to your physical location or close to the service you want to access. A nearby server often provides lower latency, while a different region may be useful when you need a specific location.