You've probably read that many people are turning their Raspberry Pi into a VPN tunnel, and you might wonder if it's really worth giving up your monthly VPN subscription. The truth is, this little computer is a Swiss Army knife capable of managing your network traffic in a wide variety of ways, whether it's accessing your home network remotely or ensuring all your devices browse securely.
Setting up this system isn't rocket science, although it largely depends on your needs. Accessing your personal files while traveling is quite different from trying to bypass geographical restrictions on Netflix or Disney+. In this regard, the Raspberry Pi can play two entirely different roles: as a server, granting you access to your home network, or as a client, acting as a gateway to the internet.
VPN Server: Your Remote Gateway
When we set up the Raspberry Pi as a server, we're creating a virtual communication network. Essentially, we're allowing external devices (like your phone or laptop) to connect to our home LAN through a secure, encrypted tunnel . This is fantastic for anyone who needs to browse securely on public Wi-Fi networks , as it would make it extremely difficult for hackers to intercept the traffic.
For this to work, the server must always be powered on and connected to the internet. Once configured, you can control printers, access file servers , or browse the web using your home IP address, even if you're on the other side of the world. To simplify this process, there's PiVPN, a tool that saves you the headache of manually managing the Certificate Authority (CA) and SSL certificates required by OpenVPN.
VPN Client: Privacy and streaming for the whole home
On the other hand, we have the option of using the Pi as a client. In this scenario, the Raspberry Pi connects to an external provider (such as NordVPN, Surfshark, or ProtonVPN) and redirects the traffic from other devices in the house through it. This is the ideal solution if you have devices that don't support VPN apps, such as some Smart TVs, or if you don't want to install the software on each device due to limitations on the number of simultaneous connections.
To implement this, a combination of OpenVPN and DNSMasq is typically used. By using iptables routing rules (MASQUERADE), we can ensure that certain network devices, configured with a static IP address and the Raspberry Pi as the gateway, have secure access to the network. This is especially useful for accessing streaming services from other countries or preventing your internet provider from monitoring your activity.
Recommended hardware and optimizations
Not all boards are created equal if you want to avoid a sluggish connection. To prevent bottlenecks, it's highly recommended to use a Raspberry Pi 3B+ or 4B , as they have Gigabit Ethernet ports. While a Pi 2 would be limited to 100 Mbps, the Pi 4 can take advantage of connections up to 1000 Mbps, which is vital these days if you want to optimize the speed of your fiber optic VPN.
If you plan on using it intensively, such as streaming media through Plex while the VPN is active, be mindful of the RAM. A 4GB Raspberry Pi 4 can handle multiple connections, but video transcoding is very demanding . In such cases, you might notice the system struggling; for smooth operation in professional environments, dedicated servers with significantly more RAM would be required, although for home use, optimizing the Pi with zram and the zstd algorithm can help alleviate the load.
Key steps for technical installation
If you decide to install it, the easiest way is to use PiVPN's automatic installation command via curl. It's essential that the device has a static IP address on the local network or that you configure a dynamic DNS service (such as No-IP or DynDNS) so that the client can always find the server even if your home's public IP address changes.
If you configure it as a gateway (client), remember that you'll need to assign static IPs outside your router's DHCP range to the devices you want to protect. Additionally, it's highly recommended to implement DnsCrypt to add an extra layer of security to DNS queries, and if you're feeling adventurous, you can combine all of this with Pi-hole to block advertising from your entire network while browsing through the tunnel.
Having a Raspberry Pi dedicated to these tasks allows you to decide exactly which traffic travels through the VPN and which follows the standard route, avoiding problems with banking websites that often block foreign IPs. While a premium VPN encrypts your data and hides your IP address from the world, setting up your own server at home is the best way to regain full control over your network infrastructure and access to your personal data.
