Kernel-Level eBPF Traffic Inspection in Zero-Trust Clouds

Why User-Space Security Proxies Are Too Slow

Traditional web application firewalls (WAF) inspect incoming network traffic by copying IP packets from kernel space to user-space applications. At multi-gigabit workloads, this context-switching overhead degrades server throughput.

Extended Berkeley Packet Filter (eBPF) allows safe, sandboxed C programs to execute directly within the Linux kernel, filtering malicious packets before they ever touch network sockets.

Real-Time Packet Filtering with eBPF

CODE SNIPPETTypeScript / Node
SEC("filter")
int bpf_prog(struct __sk_buff *skb) {
    // Inspect packet headers in kernel space
    if (is_malicious(skb)) {
        return TC_ACT_SHOT; // Drop packet immediately
    }
    return TC_ACT_OK;
}

Zero-Trust Microservice Perimeter

By running eBPF probes on every cloud node, Ceyrox infrastructure automatically validates cryptographic pod signatures and enforces strict zero-trust network policies.