DDoS Detection
Buyer's Guide 2026

Why You Need Dedicated DDoS Detection

Firewalls, WAFs, and cloud load balancers are designed to filter traffic. They are not detection systems. The difference matters when you're under attack.

Most infrastructure teams discover their DDoS vulnerability the hard way: a firewall state table fills up, conntrack drops legitimate connections, and the entire network segment goes dark. The firewall didn't fail. It did exactly what it was designed to do. It just wasn't designed for volumetric or protocol-layer floods.

The detection gap

Traditional network gear operates on allow/deny rulesets. It processes packets one at a time against a static policy. DDoS attacks exploit this by overwhelming the decision-making layer itself. A SYN flood doesn't violate a firewall rule; it creates millions of half-open connections that exhaust the connection tracking table. A DNS amplification attack arrives as valid UDP responses. A carpet bomb spreads traffic thin enough that no single IP triggers a threshold.

Dedicated DDoS detection works differently. It builds a behavioral baseline of your network's normal traffic patterns, then identifies statistical anomalies in real time. It classifies attack vectors (SYN, UDP, DNS amplification, NTP reflection, GRE, ICMP, and more) and triggers specific mitigation actions for each type.

This guide will help you evaluate the tools that fill that gap. It covers every major detection approach, the specific questions to ask during vendor evaluations, a side-by-side comparison matrix, real-world cost projections, and a 14-day plan to go from evaluation to production.

The 5 Detection Approaches

There is no single correct approach. Your choice depends on network topology, traffic volume, budget, and how much operational overhead you can absorb.

1. Flow-Based Detection

Routers and switches export flow telemetry (NetFlow v5/v9, sFlow, or IPFIX) to a collector that analyzes traffic patterns. Detection happens at the network layer by aggregating flows from multiple vantage points.

Best for: Large networks with existing flow-capable infrastructure (ISPs, transit providers, multi-site enterprises).

Trade-off: Flow data is sampled. At 1:1000 sampling, short bursts and low-rate application-layer attacks may be invisible. Detection latency depends on export interval (often 30-60 seconds).

2. Agent-Based Detection

A lightweight software agent runs on each server or network node, inspecting traffic at the kernel level. No sampling, no export delays. Detection happens in real time on the machine itself.

Best for: Hosting providers, game servers, SaaS platforms, and any environment where per-node visibility matters.

Trade-off: Requires agent installation on each node. Not practical for monitoring transit links where you don't control endpoints.

3. Inline Appliance

A dedicated hardware device sits in the traffic path and inspects every packet. Detection and mitigation happen simultaneously.

Best for: Data center edges where you need sub-second detection and mitigation without relying on upstream routers.

Trade-off: Hardware cost ($50K-$500K+), single point of failure risk, and capacity is fixed at purchase time. Scaling means buying another box.

4. Cloud Scrubbing

Traffic is routed through a third-party scrubbing center (via BGP or DNS) that absorbs and cleans attack traffic before it reaches your network. Detection is the scrubbing provider's responsibility.

Best for: Organizations that want someone else to handle volumetric attacks entirely.

Trade-off: Added latency (traffic traverses the scrubbing center even when clean), bandwidth-based pricing, and you lose visibility into what was filtered and why. Difficult to debug false positives.

5. Hybrid

Combines two or more approaches. The most common pattern: agent or flow-based detection on-premise, with automatic escalation to cloud scrubbing for attacks that exceed local capacity.

Best for: Any production network that wants defense in depth. Handle what you can locally, escalate what you can't.

Trade-off: Requires integration between detection and mitigation layers. Misconfiguration can cause escalation storms or, worse, no escalation at all.

15 Questions to Ask Every Vendor

Use this list during demos, trials, and procurement calls. The answers will separate detection platforms that work in production from those that work in slide decks.

1. What is the detection granularity? Per-second? Per-minute? 5-minute SNMP average? Anything above 1-second resolution will miss sub-minute bursts.
2. Is traffic sampled? If yes, at what ratio? 1:1000 sampling means a 1 Gbps attack might look like 1 Mbps of anomalous traffic. Ask what gets missed.
3. How many attack vectors are classified? "DDoS detected" is not useful. You need SYN, UDP, DNS amplification, NTP reflection, ICMP, GRE, and other vectors identified separately so mitigation can target the right protocol.
4. What mitigation actions are automated? Firewall rules? BGP FlowSpec? Null routes? Upstream scrubbing triggers? Ask to see the mitigation pipeline, not just the alert.
5. How is the baseline calculated? Static thresholds or dynamic baselines? How long does the learning period take? Can you tune it per node?
6. What happens during the free trial? Full functionality or feature-gated? How many nodes? Is there a traffic cap? Do you need a credit card?
7. What does the pricing model look like at scale? Per-node? Per-gigabit? Per-incident? Bandwidth licensing creates perverse incentives: the bigger your network grows, the more you pay, even if attack volume stays flat.
8. Are there hidden costs? Dedicated server requirements? Activation fees? Per-seat charges? Support tiers? PCAP retention fees?
9. How does alerting work? Which channels? (Email, Slack, PagerDuty, webhook, SMS, Telegram, Discord, etc.) Is there alert deduplication? Can you set severity thresholds?
10. What forensic data is available post-incident? PCAP captures? Flow logs? Attack timeline? Source IP distribution? PDF reports for compliance?
11. What integrations exist? SIEM (Splunk, Elastic, Sentinel, Wazuh)? IDS/IPS feeds (Suricata, Snort, Zeek)? Hosting panels (cPanel, Plesk)? Firewalls (pfSense, OPNsense, VyOS)?
12. Can I use the API programmatically? REST API for automation? Webhook callbacks for custom workflows? CLI tooling?
13. What's the deployment model? SaaS? On-premise? Self-hosted? Does it require a dedicated server or VM?
14. What does the migration path look like? If you're switching from another tool, can you run both in parallel? Is there a config converter or migration guide?
15. What's the support model? Email only? Ticketed? Direct Slack/Teams channel? Is priority support an upsell?

Vendor Comparison Matrix

Eight platforms scored across 15 criteria. Data sourced from vendor documentation, public pricing pages, and hands-on evaluation where available. Last updated July 2026.

Red Flags to Watch For

These are patterns that show up repeatedly in vendor evaluations. Any one of them should prompt deeper scrutiny.

• "Contact sales for pricing." If a vendor won't publish their pricing, it usually means the price changes based on how much they think you'll pay. It also means you can't do a self-service evaluation.
• "Requires a dedicated server." Some detection platforms require a standalone collector server or appliance just to run. That's an additional $200-1,000/month in hosting costs before you detect anything. Ask whether the platform runs as SaaS or requires you to provision infrastructure.
• "Detection in minutes." If the vendor describes detection speed in minutes, they are relying on SNMP polling intervals or aggregated flow exports. A 4-minute SYN flood can take down a service before "detection in minutes" even fires.
• "Bandwidth-based licensing." Pricing that scales with your bandwidth creates a cost structure where the penalty for growing your network is a higher security bill. A 10G network and a 100G network with identical server counts should not cost 10x differently to protect.
• "No free trial." A vendor that requires a multi-week POC engagement with sales involvement before you can test their platform has something to control in the evaluation process. Look for trials that give you the full product without gatekeeping.
• "Detection only." Detection without automated mitigation is an alerting system, not a protection platform. If the vendor expects you to manually SSH into routers during an attack, ask how that works at 3 AM when the on-call engineer is asleep.
• "Unlimited everything" with no specifics. Ask what the actual limits are. Every platform has them. If the vendor won't tell you where the ceiling is, you'll discover it during an incident.
• No post-incident forensics. If there's no PCAP capture, no source IP analysis, no attack timeline, and no PDF report, you have no evidence for ISP abuse complaints, no data for post-mortem analysis, and no documentation for compliance.

Total Cost of Ownership

The license fee is typically 40-60% of the real cost. Here's where the rest hides.

Hidden cost categories

3-year TCO comparison: 20-node deployment

Case Studies

Real attacks, real data. These are incidents that happened on production networks running Flowtriq.

Pricing Breakdown

One price. Everything included. No feature gates, no bandwidth licensing, no activation fees, no seat limits.

Per-Node Pricing (Agent-Based)

Flow Source Pricing (Network-Wide)

For routers and switches sending sFlow, NetFlow, or IPFIX. One router or switch = one source.

What you do not pay for

• No bandwidth fees (10G or 100G, same price per node)
• No activation fees or setup charges
• No per-alert or per-incident charges
• No seat limits (unlimited team members)
• No support tiers (unlimited support on every plan)
• No SIEM integration fees
• No feature gates

Managed Protection

For teams that need DDoS protection handled, not just detected. Flowtriq analysts monitor your infrastructure, respond to incidents, and run custom mitigation playbooks.

Managed Protection works on top of your existing Flowtriq deployment. You keep full dashboard access and visibility. The managed team handles incident triage, mitigation decisions, threshold tuning, and post-incident reporting. You can combine it with White-Label (Section 10) to offer managed DDoS services to your own customers.

White-Label for MSPs

Resell DDoS protection under your own brand. Your customers never see Flowtriq.

What's included

• Custom domain with your own SSL certificate
• Full visual rebrand including logo, colors, and dashboard UI
• Multi-tenant architecture with isolated customer environments
• Branded notifications including email alerts and PDF reports
• Branded API with your domain and documentation
• Unlimited users across all tenants

How it works for MSPs

You deploy Flowtriq agents on customer infrastructure. Each customer gets their own isolated tenant in your branded dashboard. They see your company name, your colors, your domain. You set the pricing. You control the margin.

Combine with Managed Protection tiers to build a full-service "DDoS Protection as a Service" offering without building detection infrastructure from scratch.

Integration Ecosystem

18 platform integrations across firewalls, hosting panels, cloud providers, SIEM platforms, IDS/IPS engines, and threat intelligence feeds.

Every integration is included on every plan at no extra cost. Full documentation and setup guides are available at flowtriq.com/integrations.

Free Tools & Certifications

Resources available to any network engineer or security professional, no Flowtriq account required.

37 Free Network Security Tools

A library of browser-based tools for DDoS analysis, firewall configuration, and network diagnostics. No login, no tracking, no paywall. Includes a DDoS Config Converter for translating firewall rules between platforms, PCAP analyzers, subnet calculators, and attack signature generators.

Full list at flowtriq.com/tools.

4 Free Certification Tracks

Structured learning paths with proctored exams, verifiable credentials, and LinkedIn-shareable badges. All free.

Certifications are available at flowtriq.com/certifications. The CDDP and CDME exams are open to everyone. CDIC and CFC require a Flowtriq account.

14-Day Implementation Checklist

A day-by-day plan from trial signup to production deployment. Designed to match the 14-day free trial so you can evaluate the full platform before committing.

Migration Playbook

Switching from another DDoS detection tool? Here's how to run a parallel deployment, validate detection parity, and cut over without gaps.

Phase 1: Parallel deployment (Days 1-7)

• Install ftagent alongside your existing tool. Flowtriq's agent is lightweight (under 50 MB RAM, minimal CPU) and does not conflict with other monitoring agents. Run both simultaneously.
• Use the DDoS Config Converter. At flowtriq.com/tools/ddos-config-converter, translate your existing firewall rules, thresholds, and mitigation configs into Flowtriq format. This preserves your tuning work.
• Mirror your alerting setup. Configure the same alerting channels in Flowtriq that you have in your current tool. During the overlap period, both tools should fire alerts on the same incidents so you can compare.
• Document baseline differences. Every tool calculates baselines differently. Note where Flowtriq's thresholds differ from your existing tool and understand why before adjusting.

Phase 2: Validation (Days 7-10)

• Compare detection events. Every incident that your existing tool detects should also appear in Flowtriq. If an incident is missing, investigate whether it's a threshold difference or a genuine detection gap.
• Check false positive rates. If Flowtriq is generating alerts that your existing tool is not, determine whether those are false positives or real attacks your current tool was missing.
• Validate mitigation actions. Trigger test mitigations and verify that firewall rules, BGP FlowSpec, and any scrubbing triggers work correctly.
• Verify forensic data. Compare PCAP captures, attack reports, and source IP analysis between both tools for the same incidents.

Phase 3: Cutover (Days 10-14)

• Disable auto-mitigation on the old tool. Switch your existing tool to detection-only mode. Let Flowtriq handle mitigation from this point.
• Redirect alerting. Move your primary alerting channels to Flowtriq. Keep the old tool's alerts as a secondary check for one more week.
• Decommission the old tool. Once you've confirmed detection parity and mitigation reliability, remove the old agent/collector. Cancel the old license.
• Notify stakeholders. Update runbooks, escalation procedures, and compliance documentation with the new dashboard URLs and incident response workflow.