License & Deployment Mix: 11 tools – 5 OSS, 6 commercial.
Color: Blue team.
What Is This Category?
DDoS mitigation absorbs and filters distributed- denial-of-service traffic before it reaches the protected service. Two tiers: volumetric (Tbps- class scrubbing centres absorbing the flood – commercial-only territory) and L7 (per-request rate-limiting / challenge-response against application-layer floods – OSS options exist).
Distinct from neighbouring categories
- Web Application Firewalls – WAF inspects request payload for malicious content; DDoS mitigation rate-limits and absorbs the volume of requests, malicious or not
- Load Balancing / ADC – Load balancers spread legitimate load; DDoS mitigation stops illegitimate load
- Firewall, Routing & UTM – Firewall is per-flow rule matching at perimeter; DDoS mitigation is high-volume traffic scrubbing
The information on these pages was researched by a combination of human review and large language models. To suggest an addition or correction, please contact us. Prepared by Rhodium Systems Inc., author of the ResorsIT platform — a unified IT operations management platform for IT teams and MSPs that integrates a curated suite of open-source, commercial, and SaaS applications into a single system with shared identity, single sign-on, access control, and a common audit trail. Use this catalogue only as a starting point for your own research, and review any tool carefully against your own requirements before relying on it. Catalogue data version 2026.197.
Comparison
Overview
DDoS mitigation splits four ways: OSS L7 rate- limiting (nginx, HAProxy stick-tables), OSS IPS / log-based (CrowdSec, fail2ban), commercial edge / scrubbing (Cloudflare, Akamai Prolexic, AWS Shield, Imperva), and on-prem appliance / carrier-scale (NetScout Arbor, Radware DefensePro, FastNetMon – the seed). Most production deployments layer two or three.
Capability Matrix
| Tool | L7 | L3/L4 | Volumetric | Self-Host | Multi-Tbps |
|---|---|---|---|---|---|
| FastNetMon Community | – | yes (detect+trigger) | – | yes | – |
| nginx + limit_req | yes | – | – | yes | – |
| HAProxy stick-tables | yes | – | – | yes | – |
| CrowdSec | yes | partial | – | yes | – |
| fail2ban | yes (modest) | – | – | yes | – |
| Cloudflare DDoS | yes | yes (Magic Transit) | yes | – | yes |
| Akamai Prolexic | yes | yes | yes | – | yes |
| NetScout Arbor | yes | yes | yes | yes (on-prem appliance) | yes |
| Radware DefensePro | yes | yes | yes | yes (on-prem) | yes |
| AWS Shield Advanced | yes | yes | yes | – (AWS-native) | yes |
| Imperva DDoS | yes | yes | yes | – | yes |
License Comparison
| Tool | License | OSI | Type |
|---|---|---|---|
| FastNetMon Community | GPL-2.0-only | yes | OSS detector |
| nginx + limit_req | BSD-2-Clause | yes | OSS web server module |
| HAProxy stick-tables | GPL-2.0-only | yes | OSS load-balancer feature |
| CrowdSec | MIT | yes | OSS modern IPS |
| fail2ban | GPL-2.0-only | yes | OSS log-watcher |
| Cloudflare DDoS | Proprietary | – | SaaS (free L7 bundled) |
| Akamai Prolexic | Proprietary | – | SaaS scrubbing |
| NetScout Arbor | Proprietary | – | On-prem appliance + cloud |
| Radware DefensePro | Proprietary | – | On-prem appliance + cloud |
| AWS Shield Advanced | Proprietary | – | AWS-native SaaS |
| Imperva DDoS | Proprietary | – | SaaS (bundled with WAF) |
Composition Patterns
1. OSS baseline for any web property
nginx + limit_req (or HAProxy stick-tables) -- L7 rate-limit CrowdSec (or fail2ban) -- log-driven IP banning
Output: L7 baseline at zero license cost. Doesn’t cover volumetric / L3-L4 attacks.
2. Cloudflare-fronted web property
Cloudflare DDoS Protection (free L7 bundled)
+ nginx limit_req (defence in depth)Output: edge volumetric absorption + L7 rate-limit in origin. Free Cloudflare tier covers most web properties.
3. Enterprise customer with own IP space
Akamai Prolexic (or NetScout Arbor or Radware DefensePro)
+ on-prem appliance for L7 + IT-side
+ FastNetMon as detection / trigger layerOutput: full enterprise / carrier DDoS mitigation with BGP-routed scrubbing.
4. AWS-native customer
AWS Shield Advanced
+ AWS WAF (managed rules)
+ AWS Firewall Manager (multi-account)Output: AWS-native DDoS mitigation. Bundled WAF rules + cost protection.
Cost Tier
Annual TCO for a mid-size customer web property.
| Tier | Tooling | Approx Cost |
|---|---|---|
| Free | nginx + HAProxy + CrowdSec + fail2ban + Cloudflare free L7 | $0 + operator time |
| Mid | Cloudflare Magic Transit | $5,000-30,000 / year |
| High | AWS Shield Advanced | $36,000 / year base + traffic |
| Top | Akamai Prolexic / NetScout / Radware | $100,000-500,000 / year |
Tools
11 tools.
Akamai Prolexic
Akamai’s premier DDoS-scrubbing service; long-standing enterprise reference for high-volume L3 / L4 DDoS protection.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC, SAML
AWS Shield Advanced
AWS’s enterprise DDoS-mitigation service; complements AWS Shield Standard (free) with managed mitigation + cost protection.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC, SAML
Cloudflare DDoS Protection
Cloudflare’s edge DDoS-mitigation tier; free L7 protection on every site behind Cloudflare; Magic Transit + Spectrum for L3 / L4 customer infrastructure.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC, SAML
CrowdSec
Modern open-source IPS + collaborative blocklist; analyses logs in real time and blocks malicious IPs; community-fed threat intelligence.
License: MIT (OSS) · Kind: service · Deploy: native, docker, package · SSO: none
fail2ban
Long-standing OSS log-monitoring + IP-banning service; SSH brute- force protection is the canonical use case; modest L7 DDoS tier.
License: GPL-2.0-only (OSS) · Kind: service · Deploy: native, package · SSO: none
FastNetMon Community
Open-source high-performance DDoS-detection toolkit; sFlow / Netflow / mirror-based detection, BGP black-hole and FlowSpec announcement on attack.
License: GPL-2.0-only (OSS) · Kind: service · Deploy: native, docker, package · SSO: none
HAProxy stick-tables
HAProxy’s stick-tables feature; per-client rate / volume tracking with configurable thresholds; first-line L7 DDoS in HAProxy deployments.
License: GPL-2.0-only (OSS) · Kind: service · Deploy: native, docker, package · SSO: none
Imperva DDoS Protection
Imperva’s DDoS-mitigation tier; bundled with their WAF / API security platform; Israeli vendor with strong enterprise WAF heritage.
License: Proprietary (proprietary) · Kind: web · Deploy: saas · SSO: OIDC, SAML
NetScout Arbor
NetScout’s DDoS-detection + mitigation platform; on-prem + cloud scrubbing centres; long-standing reference at carrier / ISP scale.
License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: OIDC, SAML
nginx + ngx_http_limit_req
nginx’s built-in rate-limiting module; first-line L7 DDoS mitigation that ships with every nginx deployment.
License: BSD-2-Clause (OSS) · Kind: service · Deploy: native, docker, package · SSO: none
Radware DefensePro
Radware’s DDoS-mitigation platform; on-prem appliances + Cloud DDoS Protection Service; Israeli vendor with strong telecom presence.
License: Proprietary (proprietary) · Kind: web · Deploy: native, saas · SSO: OIDC, SAML
