Set up firewall rules directly in the Customer Control Panel - no command line required.
Your firewall runs at the network level, so traffic is filtered before it ever reaches your server.
The firewall service comes built into every VPS and VDS at no extra cost.
Allow traffic based on specific IP addresses, port ranges, or protocols.
What is the Built-in Firewall Service from Contabo?
A server firewall is a security layer that filters incoming and outgoing network traffic based on rules you define. Our built-in firewall for server instances works at the network level, meaning all traffic is blocked by default before it even reaches your VPS or VDS. You define the rules to allow only the traffic you choose.
Unlike software firewalls you install on your OS, the Contabo hosting firewall runs independently of your instance. It stays active even if your server is rebooting or misconfigured - and you manage all your rules directly from the Contabo Customer Control Panel.
Why Do I Need a Firewall?
Stop Threats Before They Reach Your Server
A hosting firewall blocks malicious traffic at the network edge - long before it touches your application. Without one, your VPS is vulnerable.
Control Exactly What Traffic Gets Through
A cloud firewall lets you define which IPs, ports, and protocols are allowed. No matter what you're running, targeted rules reduce your attack surface.
Get Network Security Without the Hassle
Our dedicated firewall security service gives you network-level protection built directly into your hosting environment - completely free, with no extra software.
Who is Firewall For?
Running a side project or game server? Lock down every port except the ones you actually need.
Your web app or online store handles real customer data. Block unauthorized access at the network level.
When managing multiple instances, set firewall rules across all of them from one dashboard.
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Firewall Guides
Learn everything there is to know about Firewall in our Knowledge Base: Firewall: What is it and how does it protect my VPS/VDS?
Ready to lock down your server? This guide walks you through everything step by step: How to Configure a Firewall for a Cloud-Based Server (Linux & Windows)