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

In the world of decentralized networking and high-availability hosting, uptime is everything. But volumetric Distributed Denial of Service (DDoS) attacks remain one of the biggest threats to infrastructure, capable of overwhelming even the most robust networks.

The Problem with Standard Firewalls
When under attack, many administrators try to block the malicious traffic using standard firewalls like iptables, UFW, or nftables. However, during a massive volumetric flood (like a DNS or NTP amplification attack), these tools fail. Why? Because the server's CPU quickly reaches 100% exhaustion just trying to process and drop the packets in the OS kernel. The server goes offline anyway.

The EPY Host Solution
To survive high-capacity attacks, enterprise networks use dedicated "scrubbing centers."

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

By combining FRRouting (FRR) to steer traffic and XDP/eBPF to drop malicious packets directly at the network card driver level (before they even hit the OS), you can process millions of packets per second without breaking a sweat.

Secure your network and maintain your uptime by implementing enterprise-grade DDoS mitigation.

Read the full step-by-step tutorial here:
🔗 https://www.epyhost.com/tutorials/howto/build-ddos-scrubber-ebpf-frr/