A guide to self-hosting internal communications behind a VPN
In an era where data breaches and third-party surveillance are constant threats, many organizations are moving away from public cloud-based messaging platforms. For true internal privacy, nothing beats a self-hosted messenger behind a VPN.
By combining these two technologies, you ensure that your communication server is invisible to the public internet, accessible only to authorized users with the correct cryptographic keys.
Why use a VPN for internal chat?
Standard messengers often encrypt data in transit, but the data still passes through (and is often stored on) the provider's servers.
By hosting your own server behind a VPN, you achieve:
- Zero public exposure: Your chat server does not have a public IP address. It is effectively dark to anyone outside your private network.
- Reduced attack surface: Since no ports are open to the general internet, common threats like DDoS attacks or unauthorized login attempts are neutralized.
- Data sovereignty: You own the hardware and the database. No third party can access your corporate communication.
- Access control: Access is managed at the network level. If an employee leaves, revoking their VPN access instantly cuts their connection to all internal tools, including chat.
Technical requirements
To set up this environment, you will need:
- A host server: A dedicated machine or virtual private server
- VPN Software
- Messenger software: For example, Virola Messenger (Server and Client applications).
Step-by-step setup guide
1. Configure the VPN tunnel
The first step is establishing the secure perimeter. While there are many options, WireGuard VPN is currently favored for its high performance and modern encryption.
- Install WireGuard on your server and generate private/public keys.
- Configure the Server Peer: Set up a virtual network (e.g., 10.0.0.x).
- Client configuration: Install the VPN client on employee devices and share the configuration files.
- Verification: Ensure that once the VPN is active, the client can "ping" the server's internal IP address (e.g., 10.0.0.1), but cannot reach it when the VPN is off.
2. Install the Virola Server
Virola Messenger is an ideal candidate for this setup because it supports standalone server installations and offers high-level security features.
- Download Virola Server package for your OS.
- Follow Virola Server installation guidelines for your OS
- Internal binding: Crucially, ensure the Virola server is configured to listen on the VPN interface IP (e.g., 10.0.0.1) rather than 0.0.0.0 (all interfaces). This ensures it only accepts traffic coming through the VPN tunnel.
3. Virola Client setup
Once the server is running, users must connect through the Virola client installed on their devices.
- Download and install Virola Client.
- Log into Virola Client using server host, port, username and password provided by Virola admin.
Best practices for maximum security
- Disable public ports: Use a firewall to block all incoming traffic except for the specific port required by your VPN.
- Implement Multi-Factor Authentication (MFA): Ensure your VPN provider requires MFA to connect. This prevents a stolen device from compromising the entire network.
- Regular backups: Encrypt and back up your Virola database regularly. Since it's internal, you are responsible for data recovery.
- Make regular software updates: Keep both the VPN software and Virola updated to protect against newly discovered vulnerabilities.
The bottom line
Setting up Virola Messenger behind a VPN creates a secure environment for your company's data. While it requires more initial configuration than a SaaS product, the peace of mind knowing that your internal discussions are shielded from the outside world is an invaluable asset for any security-conscious organization.