AI agent tools are moving fast, and OpenClaw is one of the more compelling options on the market right now. It functions as an AI agent gateway, connecting popular chat applications, such as WhatsApp, Telegram, Discord, and iMessage to name a few, directly to AI models like GPT-4o or Claude. That kind of power and flexibility is exactly what makes it valuable, but it's also exactly what makes securing it non-negotiable. New tools always come with security risks, but that doesn’t mean you must avoid them altogether.
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By default, OpenClaw's gateway is accessible on the host where it's deployed. If that host is exposed to the public internet without additional safeguards, the gateway may also be publicly reachable. If you expose it to the public internet without proper safeguards, you're handing anyone who finds it control over your AI environment. This includes your files, your connected apps, and all your data. Not exactly best practice.
The good news is that if you're already running OpenVPN Access Server, locking down OpenClaw access is relatively straightforward. In this setup, OpenClaw isn't exposed on a public endpoint but instead accessed through a private network path managed by Access Server.
Why VPN-gated access matters for OpenClaw Security
OpenClaw is designed for trusted environments. Its security model assumes one trusted operator boundary, which means that if multiple people can reach your gateway, they're all working within the same permission set. That's fine in a controlled setup. It's a significant risk if your gateway is publicly reachable.
Routing traffic to OpenClaw through Access Server ensures the service is only reachable from the VPN network. By exposing OpenClaw on a private IP and defining routing rules in Access Server, users need to be connected to the VPN to access it. Users who aren't on the VPN simply can't get to it — no publicly exposed access to the service when properly configured.
What the setup looks like
OpenVPN has published a full tutorial walking through how to secure OpenClaw access with Access Server, and there's also a video walkthrough available to help you follow along visually.
The scenario covered in the tutorial is a common one: an IT administrator who already uses Access Server in split-tunnel mode to route traffic to internal applications. The company adds OpenClaw to that environment and wants to ensure it stays VPN-gated.
The setup involves a few key steps:
- Deploy OpenClaw via the DigitalOcean Marketplace (the tutorial recommends at least 2 vCPUs and 4 GB RAM for solid performance).
- In the Access Server Admin Web UI, navigate to Access Controls and configure Global Access Rules.
- Under IP Addresses and Subnets, set the routing mode to NAT and add the OpenClaw Droplet's private IP as a routed resource.
- Optionally configure domain-based routing (Access Server 3.1.0 or newer is required for this).
- Save, restart, and verify that OpenClaw is only reachable over the VPN.
For teams with more complex infrastructure, the tutorial also covers deploying OpenClaw in a separate DigitalOcean VPC and connecting it to Access Server via VPC peering — a useful option if you need to route traffic across VPC networks while maintaining private connectivity between environments.
Don't skip this step
AI agent gateways are powerful precisely because they can act on your behalf across multiple systems and channels. That's also why access control matters more here than it does for most applications. Locking down OpenClaw behind your VPN isn't an advanced configuration — it's the baseline.
If you're running Access Server and adding OpenClaw to your environment, this should be part of your setup from day one.
Check out the full tutorial in the OpenVPN documentation for the complete step-by-step guide.
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