Threat Defense Grid
DDoS Mitigation
Adaptive defense for Layer-7 and volumetric DDoS — including the application-layer floods a CDN alone will not stop.
Layered DDoS defense for the attacks that actually take services down: application-layer (L7) floods that bypass caching and exhaust worker pools, plus volumetric attacks absorbed at the edge. Traffic baselining, edge rate limiting, and origin lockdown keep critical services online.
From always-on volumetric absorption to surgical application-layer rate limiting, we keep the endpoints attackers actually target — search, APIs, contact forms, login — online under load. Detection is tuned to your baseline so a flood is caught in minutes, and the origin is locked to the edge so it can never be hit directly.
What you can expect- Application-layer (L7) floods stopped before they reach a worker
- Volumetric attacks absorbed and scrubbed at the edge
- Origin locked to the CDN — no direct-to-origin bypass
- A flood detected and throttled in minutes, not after the outage
Why This Matters
From challenge to controlled delivery
The Challenge
Volumetric DDoS is the attack everyone plans for — but the ones that quietly take sites down are application-layer (L7) floods: a few dozen unauthenticated requests to an uncacheable endpoint that slip past the CDN and exhaust the origin worker pool. A CDN protects what it can cache; it cannot cache a POST. Most stacks are one misconfiguration away from an L7 collapse that looks like an outage, not an attack.
Our Approach
We defend both layers. Volumetric traffic is absorbed and scrubbed at the edge; application-layer floods are stopped where they land — with per-endpoint rate limiting on the dynamic paths, origin lockdown so the edge cannot be bypassed, and worker-pool and cache tuning that raises the exhaustion threshold. Defenses are baselined against your real traffic and validated against the exact attack patterns we research and publish.
Capabilities
What this engagement covers
Application-Layer (L7) Flood Defense
Per-endpoint rate limiting on the dynamic, uncacheable paths attackers target — search, REST APIs, contact forms, login — so a flood never occupies a worker. This is the attack a CDN alone misses, and where most real outages come from.
Volumetric Absorption & Scrubbing
High-volume L3/L4 traffic is absorbed and filtered at the edge across a global anycast footprint, well before it reaches your origin capacity.
Origin Lockdown
The origin is firewalled to accept traffic only from your CDN ranges, and non-CDN requests are refused — so an attacker who finds the origin IP cannot route around every edge protection.
Traffic Baselining & Anomaly Response
Defenses are tuned to your real traffic shape, so an anomalous surge on a single path is caught and throttled in minutes rather than mistaken for a normal spike.
Worker-Pool & Cache Hardening
Worker-pool tuning, opcode caching, and cache-policy review raise the exhaustion threshold and make each request cheaper — changing the math so concurrency alone cannot take you down.
Validated Against Real Attacks
Controls are pressure-tested against the exact application-layer techniques documented in our published security research — not assumed to work because they were configured once.
Application-Layer (L7) Flood Defense
Phase 01
Volumetric Absorption & Scrubbing
Phase 02
Origin Lockdown
Phase 03
Traffic Baselining & Anomaly Response
Phase 04
In Focus
Capabilities in context
Here is what each capability actually means in delivery — the concrete work we do, the patterns we apply, and the outcome you can expect on the ground.
Delivery
Implementation path & expected outcomes
Implementation Path
- Baseline traffic and map the unauthenticated, uncacheable endpoints
- Edge rate-limit rules on dynamic paths plus volumetric scrubbing
- Origin lockdown to CDN ranges plus worker-pool and cache hardening
- Adversarial validation against real L7 attack patterns, then runbooks
Expected Outcomes
- Application-layer (L7) floods stopped before they reach a worker
- Volumetric attacks absorbed and scrubbed at the edge
- Origin locked to the CDN — no direct-to-origin bypass
- A flood detected and throttled in minutes, not after the outage
Technology
Typical stack for this service
Anycast Edge
WAF
Rate Limiting
nftables
PHP-FPM
Suricata
Final tooling is selected during discovery to match your existing estate, compliance posture, and team skills.
Why Orospor
Built to run in production
We don't hand over slideware. Every DDoS Mitigation engagement ships as working, observable, owned systems — engineered to hold up under real load.
- Production-grade delivery with rollback-safe checkpoints at every phase
- Observability, runbooks, and ownership built in — not bolted on later
- Security and compliance posture considered from the first design review
- Cost, risk, and reliability tracked against KPIs you can actually see
FAQ
Common questions
What is a Layer-7 (application-layer) DDoS attack?
An L7 DDoS attack floods the application itself — search, APIs, login, contact forms — rather than saturating bandwidth. Because these requests look legitimate and hit uncacheable endpoints, they bypass the CDN and exhaust the origin worker pool. A few dozen concurrent requests can take a standard site offline, which is why L7 is the class of DDoS most likely to cause a real outage.
How is Layer-7 DDoS different from a volumetric attack?
Volumetric (L3/L4) attacks try to saturate bandwidth with sheer traffic volume and are absorbed at the edge. Application-layer (L7) attacks use a small number of expensive, valid-looking requests to exhaust origin resources. They need different defenses — edge scrubbing stops the former; per-endpoint rate limiting and origin hardening stop the latter.
Does a CDN like Cloudflare already stop application-layer DDoS?
A CDN stops most volumetric attacks and caches static content — but it cannot cache a POST or a dynamic API call, so those requests are forwarded straight to your origin. If the origin IP is also exposed, an attacker can bypass the CDN entirely. CDN protection is necessary but not sufficient for L7 DDoS; the origin still needs rate limiting and lockdown.
How fast can you deploy L7 DDoS protection?
Edge rate-limit rules and origin lockdown can be deployed in hours on an existing stack, and are the highest-leverage first move. A full engagement — baselining, worker-pool hardening, and adversarial validation — is delivered in phased, rollback-safe waves with no big-bang cutover.
Start with a scoped assessment
We begin every DDoS Mitigation engagement with a short discovery phase — clear findings, clear plan, no obligation.
