Stop Attacks Before They Reach Your App.
On Your Server. Under Your Control.
WAFio protects your web applications and servers with multi-layer security that runs entirely on your infrastructure. No third-party cloud, no subscription fees, no vendor dependency — just full control over your security stack, deployed in minutes.
Deployed in production by security-minded teams
who know what they're running.
Deployed across 50+ production servers — protecting real client infrastructure without routing a single byte through someone else's cloud.
Freelancers & Consultants
You manage security for multiple clients. Deploy WAFio on each client's own server — one control plane, each client fully isolated. You stay in control, their data never leaves their infrastructure.
- Manage all clients from one dashboard
- Per-client project isolation
- No per-seat or per-client fees
Security Engineers
Purpose-built for engineers who understand the threat model. 14 semantic engines, OWASP CRS v4, eBPF kernel firewall — real detection, not checkbox compliance.
- Full forensic detail on every blocked request
- Tune sensitivity without touching config files
- Runtime security with syscall-level tracing
DevOps & Sysadmins
One install script. Systemd units. gRPC-managed agent config. No YAML sprawl, no Kubernetes operator required. Runs on any Linux server, VM, or bare metal.
- Deploy in under 5 minutes with install.sh
- Zero-downtime agent upgrades via SIGUSR2
- Works on any Linux — kernel ≥ 5.8
Stop attacks at every layer —
kernel, network, and application.
Most WAFs only inspect HTTP traffic. WAFio deploys three independent security subsystems: the eBPF firewall drops malicious packets before userspace, the WAF catches injection attacks in real-time, and Runtime Security monitors process behavior inside the host. No blind spots.
Web Application Firewall
Every HTTP request passes through 14 semantic engines in parallel — catching SQLi, XSS, CMD injection, LFI, SSRF, LDAP injection, prototype pollution, and more. OWASP CRS v4 adds 3,500+ signature rules as a second detection layer.
- 14 parallel semantic analyzers
- OWASP CRS v4 — 3,500+ detection rules
- Configurable sensitivity & score thresholds
- GeoIP country blocking + JA3 bot fingerprinting
- Sub-5ms p99 detection latency
eBPF Network Firewall
XDP hooks run in the kernel driver — packets are inspected and dropped before a single byte touches userspace. Blocks SYN floods, port scans, and IP/ASN-based threats at line rate with sub-microsecond overhead.
- XDP/TC hooks — kernel-native, before userspace
- IP, CIDR, and ASN block & allow lists
- Protocol and port-level enforcement
- Per-source rate limiting in BPF maps
- Live rule push via gRPC — no agent restart
Runtime Security
eBPF kprobes hook into live kernel functions — no sampling, no polling, zero overhead. Catch privilege escalation, container escapes, web shells, and data exfiltration that bypass the network layer entirely.
- Syscall monitoring via eBPF kprobes/tracepoints
- Process execution & binary integrity tracking
- File system event tracing (open, write, unlink)
- Outbound anomaly detection — catch C2 beaconing
- Container-aware: Docker, Podman, Kubernetes
Three independent layers,
one attacker can't bypass all three.
eBPF drops network threats before userspace ever sees the packet. The WAF catches application-layer attacks with 14 semantic engines. Runtime Security detects attackers who got past both — executing inside your host.
Packet Arrives at NIC
Every inbound packet triggers the XDP hook attached directly at the network driver level — before the kernel network stack allocates an sk_buff, before any socket is involved, and before any userspace process has a chance to see it. This is the earliest possible interception point in Linux.
BPF Map Rule Lookup
The XDP program performs a constant-time lookup against BPF hash maps holding block rules: individual IPs, CIDR ranges, Autonomous System Numbers (ASNs), and port/protocol combinations. Rules are pushed live from the WAFio control plane via gRPC — no agent restart, no rule reload delay.
Kernel Drop or Pass
Packets matching a block rule are returned XDP_DROP — discarded at the driver level in under 1 microsecond, never consuming kernel TCP stack resources or userspace CPU. Clean packets receive XDP_PASS and continue up the network stack as normal, with zero added latency.
TCP SYN 185.220.101.45:4422Packet discarded at NIC driverHTTP Request Intercepted
Packets that pass the eBPF firewall reach the WAFio WAF agent — a reverse proxy sidecar alongside your application. Every inbound HTTP request is intercepted before it reaches your app code. No code changes, no SDK, no library required. Works with any language or framework.
Semantic + CRS Analysis
14 semantic engines parse SQL, XSS, CMD injection, LFI, SSRF, LDAP injection, prototype pollution, Java deserialization, PHP, Python, NoSQL, SSTI, XXE, and deserialization payloads simultaneously. OWASP CRS v4 then adds 3,500+ signature rules on top — two independent detection layers running in parallel on every request.
Score & Decision Engine
The Decision Engine maps matched rules to threat categories, applies confidence weights, and sums scores. Requests above your configured block threshold are blocked instantly with HTTP 403. Below the threshold — logged with full context or allowed through silently.
GET /search?q=' OR 1=1--HTTP 403 — ForbiddenSyscall Invoked
Even if an attacker bypasses the network — Runtime Security watches inside the host. Every call to execve, openat, connect, bind, and 40+ other syscalls triggers an eBPF kprobe or tracepoint on the live kernel. No kernel module, no sampling, no polling.
Event Enriched & Analyzed
Each kprobe capture includes: PID, parent process tree, full binary path and SHA-256 hash, effective user and group IDs, cgroup, and Linux namespace identifiers. Events are evaluated against process baseline profiles and behavioral rules — detecting anomalies like a web server spawning a shell.
Alert or Enforce
Anomalous events stream in real-time to the WAFio dashboard with full forensic context: process tree, binary fingerprint, syscall arguments, and container attribution. Optionally enforce via seccomp-style response — the syscall is blocked before it completes, stopping the threat at the kernel boundary.
execve("/bin/bash", ["-i"])Event streamed to dashboardWhile competitors stop at L7,
WAFio reaches into the kernel.
Two independent eBPF subsystems catch what HTTP inspection alone can't see — malicious packets before userspace, and attacker behavior inside your running processes.
eBPF Network Firewall
XDP programs attach to the NIC driver — packets are inspected and dropped before the kernel network stack processes them. Sub-microsecond per-packet overhead.
Runtime Security
eBPF kprobes and tracepoints hook directly into live kernel functions — monitoring process execution, file access, and syscalls in real-time with zero sampling overhead.
Your data. Your infrastructure.
Your control.
Unlike SaaS WAFs that route your traffic through their cloud, WAFio runs entirely within your network. Request payloads, application data, and security logs never leave your servers.
Try WAFio Right Now — No Install Required
A live WAFio deployment is running on a real server in New Jersey, protecting OWASP Juice Shop — the world's most popular intentionally vulnerable web app. Fire SQL injections, XSS, and path traversal attacks at it, then watch them get blocked in the dashboard in real time.
Free software.
Your infrastructure.
WAFio is free — no subscription, no feature locks, no agent limits. Install on any server and own your security stack end-to-end.
Free account required. No credit card. No license key.
Free for personal and commercial use. Reselling or redistributing this software as a standalone product is not permitted. See Terms →