How to Build a Custom DDoS Scrubbing Gateway with eBPF & FRR


 The Threat of Volumetric Attacks Volumetric Distributed Denial of Service (DDoS) attacks are designed to overwhelm your network capacity. Whether it's a DNS, NTP, or memcached amplification attack, the goal of the attacker is simple: flood your server with so much garbage data that legitimate traffic cannot get through.

Why Standard Firewalls Fail When under attack, many administrators immediately turn to standard Linux firewalls like iptables, UFW, or nftables. However, these tools operate too high up in the networking stack. During a massive volumetric flood, your server's CPU quickly reaches 100% exhaustion just trying to process, evaluate, and drop the packets. The firewall itself becomes the bottleneck, and the server goes offline anyway.

The Enterprise Solution: Scrubbing Centers To survive high-capacity attacks, enterprise networks rely on dedicated "scrubbing centers." Instead of letting the target server handle the attack, traffic is routed through specialized nodes that filter out the bad traffic and only forward the clean data.

In our comprehensive new tutorial, you will learn how to build your very own scrubbing gateway using a high-bandwidth bare metal server from EPY Host.

We will show you how to leverage:

  • XDP/eBPF: To drop malicious packets directly at the network card driver level before they ever reach the OS kernel, saving immense CPU resources.

  • FRRouting (FRR): To seamlessly steer and manage your network traffic.

With this setup, your infrastructure can process millions of packets per second without breaking a sweat.

Ready to upgrade your network security? Dive into the complete step-by-step guide on EPY Host: 🔗 https://www.epyhost.com/tutorials/howto/build-ddos-scrubber-ebpf-frr/

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