MCP over VPN

MCP over VPN is a common enterprise pattern where remote servers are accessed over a secure tunnel, rather than being exposed to the public internet.

Implementation

• SSE/WebSocket: Remote servers often use SSE or WebSockets for communication.
• Encryption: The VPN provides an additional layer of AES encryption on top of the protocol's TLS.
• Network Access Control: The host must be logged into the VPN to resolve the server's private DNS or reach its IP address.

Why it's used

It allows companies to leverage specialized, cloud-hosted AI models (like Claude or GPT-4) while keeping the MCP server that manages their proprietary data safely within their private network.

Questions & Answers

What is the "MCP over VPN" architecture pattern?

It is a security pattern where an MCP client accesses a remote server through a secure, encrypted Virtual Private Network (VPN) tunnel instead of over the public internet.

What are the main security benefits of running MCP over a VPN?

The primary benefits include an extra layer of AES encryption on top of standard protocol security, better control over network access (NAC), and the ability to keep sensitive data and server IPs hidden from the public web.

Why is this pattern popular in enterprise AI settings?

It allows enterprises to use powerful cloud-based LLMs while ensuring that the MCP servers hosting their proprietary data remain protected within their private company network.