How to Use OpenVPN to Secure Your Data in 2026

You want to browse the internet safely, but public Wi-Fi feels risky.

Hackers are everywhere. Without protection, your passwords and files can be stolen ngay lập tức.

That makes checking your bank account or email dangerous.

OpenVPN works on almost any device and keeps your information safe instantly.

Learning how to use OpenVPN is the answer. It creates a private tunnel for your dữ liệu so no one can spy on you.

OpenVPN

Hơn 70% mạng Wi-Fi công cộng dễ bị tấn công. Hãy bảo vệ kết nối của bạn ngay bây giờ với OpenVPN. Tải xuống hướng dẫn dễ hiểu của chúng tôi và bắt đầu chỉ trong vài phút!

Hãy dùng thử OpenVPN miễn phí! Đọc ôn lại đầy đủ Các lựa chọn thay thế OpenVPN

OpenVPN Tutorial

Getting started is simple. You only need the OpenVPN Connect app and a profile file.

Follow these steps to secure your internet connection on any device.

It protects your data instantly.

Cách sử dụng OpenVPN

You can set up your own VPN service to keep your data safe.

This guide works best for Linux distributions like Ubuntu or Debian.

You will turn your computer into a server machine that handles the connections.

Step 1: Install the Software

First, you need to get the program on your system.

• Update your system and download the OpenVPN package.
• Check that you have installed OpenVPN correctly in your program files.
• You also need the easy-rsa directory tool to generate security codes.
• Move the sample server configuration to your main folder.
• This completes the basic OpenVPN installation.

Step 2: Create Keys and Certificates

Now you must set up the public key infrastructure for security.

• Edit the vars file to define your specific settings.
• Build the CA server to act as the master authority.
• Generate the CA private key and keep it very safe.
• Create a certificate signing request for the server and multiple clients.
• Sign the certificate files and generate the private key for each user.
• Create the key file for TLS authentication to prevent hackers.
• Generate client keys and the key files needed for the connection.
• This process sets up the key server role.

Step 3: Configure and Connect

Finally, you need to set the rules and start the connection.

• Open the conf file to adjust settings like ip forwarding.
• Set up a routed VPN so traffic flows correctly.
• Make sure the public IP address matches your IP address list.
• Adclient-specific rules if you need different permissions.
• Save the config files and restart OpenVPN to apply changes.
• Move the ovpn configuration files to your client device.
• Start the Client and watch for the initialization sequence.
• Look for the now authenticated certificate header log message.
• If successful, your secure tunnel is active.

How to Use Remote Access

Truy cập từ xa allows your team to work from anywhere.

You need to set up the main computer and then help your users connect.

Follow these steps to get everything working.

Step 1: Prepare the Server

You need a central point for your team to connect to.

• Start the OpenVPN service on your main computer.
• Ensure the server configuration is ready to accept client connections.
• Generate the server certificate and the server key for security.
• Check that your ip address is public so people can find you.
• This establishes the main OpenVPN connection point for everyone.

Step 2: Set Up User Accounts

Now you need to let your specific users in.

• Create unique client certificates for each team member.
• Start creating configuration files that tell their computers where to go.
• You can try configuring client-specific rules to control who sees what.
• SDNS: the DNS servers correct their internet so it works fast.
• Use the standard OpenVPN protocol to keep their data safe.
• This part involves configuring OpenVPN to manage your users safely.

Step 3: Connect Your Devices

Finally, get your team online from their locations.

• Go to the client machine and install OpenVPN software.
• Download the ovpn file from your vpn provider or IT admin.
• Open the OpenVPN GUI from the system tray applet near your clock.
• Import the file to configure OpenVPN on that specific device.
• Click Client Connect to start the secure VPN tunnel.
• Wait a moment until you see the initialization sequence completed.

How to Use Site-to-Site Networking

Site-to-site networking connects two different office locations.

It makes two networks act like one big network.

You need to configure one side as the leader and the other as the follower.

Step 1: Set Up the Headquarters

First, prepare your main office to receive connections.

• Install the OpenVPN software on your central vpn server machine.
• Go to the etc openvpn folder to find the sample configuration files.
• Copy one of these to create your primary server configuration file.
• Edit this server config file to define your specific OpenVPN server configuration.
• Make sure you generate the server and client certificates securely.
• This computer will now act as the main OpenVPN server.

Step 2: Configure the Branch Office

Next, set up the second location to talk to the first one.

• Set up the second device using the client configuration file.
• You must create a unique client certificate for this specific office.
• Edit the OpenVPN configuration file on this device to match the server.
• Ensure the client configuration files point to the correct IP address.
• This completes the basic OpenVPN configuration for the branch office.

Step 3: Verify the Connection

Finally, make sure the two buildings can talk to each other.

• Check that the correct config file is saved on both computers.
• Load the configuration file and start the service on both sides.
• Check your status logs to confirm the vpn connection.
• Ensure the configuration files allow traffic to flow freely between sites.

OpenVPN Alternatives

So sánh OpenVPN

Phần kết luận

OpenVPN is a powerful tool for your privacy.

It allows you to run your own vpn server or simply connect safely as a vpn client.

Whether you are protecting personal data or linking offices, it works well.

Just make sure your OpenVPN server configuration file is set up correctly first.

Then, you can use the OpenVPN client on almost any device. It keeps your information secure from hackers.

Start using it today to duyệt the internet without worry.

Câu hỏi thường gặp

More Facts about OpenVPN

• Mutual Trust: OpenVPN uses a method in which both the client (computer) and the server verify each other’s “ID cards” (certificates) before connecting. This ensures both sides are who they say they are.
• Digital Keys: To set this up, you need a system called PKI (Public Key Infrastructure) to manage and sign these digital certificates.

• Strong Locks: Experts recommend using AES-256-GCM to lock (encrypt) your data. This ensures no one else can read your information as it travels across the internet.
• Forward Secrecy: OpenVPN uses a feature called Perfect Forward Secrecy. This generates a brand new key for every session, so even if a hacker steals an old key, they cannot decode your past data.
• Extra ID Checks: You can use a username and password along with your certificate. For even greater security, you can enable Multi-Factor Authentication (MFA), which requires a special code sent to your phone.
• Checking for Bad Keys: If a certificate is stolen or no longer valid, you can add it to a “Revocation List” (CRL). The server checks this list to block those keys.
• HMAC Security: You can use either tls-auth or tls-crypt. This adds a unique signature to the connection process, blocking hackers from even attempting to initiate a handshake.
• UDP vs. TCP: It is usually better to use UDP (a type of Internet protocol) because it is faster. Using TCP can sometimes cause traffic jams known as “TCP meltdown.”
• Split Tunneling: You can set up “split tunneling.” This sends only your work or private traffic through the VPN, while letting your normal internet browsing go through your regular connection.
• Layers: OpenVPN creates a secure tunnel that works at either Layer 2 (bridged) or Layer 3 (routed) of the networking model.
• IP Addresses: The server can automatically provide your computer with settings such as DNS addresses. Also, make sure the VPN uses a different set of IP numbers than your home network to avoid confusion.
• Firewalls: You need to set up firewall rules to let OpenVPN traffic pass through. You can also use firewalls to limit what users can touch once they are connected strictly.
• The App: The OpenVPN Connect app is available for Windows, Máy Mac, Linux, Android, and iOS. It shows you a green light or icon when you are safely connected.
• Profiles: To connect, you usually import a file ending in .ovpn. This file tells the app where to connect and how to behave.
• Admin Rights: On Windows computers, you often need to run the program as an administrator to grant it permission to change your network settings.
• Kill Switch: You can turn on a “kill switch” in the settings. If your VPN connection suddenly drops, this feature stops all internet traffic immediately to keep your data safe.
• Updates: Always keep your OpenVPN software up to date. This fixes bugs and closes security holes.