What is DDoS simulation testing?
A distributed-denial-of-service (DDoS) attack tries to overwhelm a service with traffic until legitimate users can no longer reach it. DDoS simulation testing reproduces that pressure on purpose, against systems you control, so you can find the breaking point on your own schedule instead of discovering it during a real incident.
Good simulation testing is bounded and observable: you know exactly what traffic is generated, you watch service health in real time, and you can stop the moment you have your answer. That is the model ddos-sim.com is built around.
What does a DDoS simulation test?
A useful test does more than ask whether a website stays online. It applies a known traffic pattern while you observe the full delivery path, helping you identify which control or component reaches its limit first.
Edge protection
Validate whether CDN, WAF, bot-management, and rate-limiting rules recognize the planned traffic and protect the origin before users are affected.
Network and connection state
Exercise ingress capacity, firewalls, load balancers, TCP backlogs, and connection-tracking tables with bounded Layer 3 and Layer 4 techniques.
Application capacity
Measure how TLS termination, HTTP servers, application workers, and downstream dependencies behave when request or connection pressure increases.
Operational readiness
Confirm that monitoring, alerts, stop conditions, escalation contacts, and incident procedures work while the event is happening—not only on paper.
Define success before choosing techniques. For example: keep checkout errors below an agreed threshold during a controlled request ramp, confirm edge controls activate before origin latency rises, or verify that a connection limit fails closed without affecting unrelated services.
When is DDoS simulation testing the right choice?
It is a good fit when
- you own the target or hold explicit authority to test it;
- you want to validate DDoS controls with real, bounded traffic;
- you have a measurable availability or incident-response objective; and
- operations, security, and relevant providers can support an agreed test window.
Choose a different test when
- you only need normal-user capacity numbers—a load test is usually enough;
- you are looking for exploitable security flaws—a penetration test has a different purpose;
- ownership or provider permission is unclear; or
- the objective requires unbounded or destructive traffic.
DDoS simulation vs. load testing vs. penetration testing
| Assessment | Traffic or activity | Primary question | Typical outcome |
|---|---|---|---|
| DDoS simulation | Controlled adversarial traffic patterns across Layers 3–7 | Do availability controls and response procedures hold up? | A measured threshold, observed failure mode, and remediation target |
| Load test | Expected user journeys and application requests | Does the application meet capacity and performance goals? | Throughput, latency, resource use, and scaling behavior |
| Penetration test | Exploit-oriented security testing | Can a tester find and demonstrate security weaknesses? | Validated vulnerabilities and remediation advice |
The categories can overlap. An HTTP simulation may resemble a high-load test, but its scope, authorization, traffic pattern, safety controls, and availability objective make the difference.
How we run simulations safely
Every technique below is scoped at each layer, by design:
- Verified domains only. Ownership is proven over HTTPS before anything runs, and each worker refuses any target other than its one assigned domain.
- Our own machines, never a botnet. Simulations run from ddos-sim.com's dedicated load-generation machines — never compromised hosts — sending only bounded traffic with no arbitrary payloads to a pinned public address, with private and loopback destinations blocked.
- Per-domain limits. Rate, concurrency, and worker counts are capped per domain and scaled to its validation level.
- Automatic abort. Set error-rate, latency, or status-code thresholds and the test stops itself the instant your service crosses them.
The result is a stress test, never a weapon. See the Acceptable Use Policy for the full rules.
What happens during a DDoS testing engagement?
- Define the outcome and draft the plan. Build a command timeline yourself, or describe the target and objective so we can design one with you. A browser-only draft does not require an account.
- Request a review and quote. We review the target, techniques, rates, duration, worker count, safety controls, infrastructure, preferred window, and provider requirements, then price that specific engagement.
- Authorize the agreed scope. After accepting the quote, an authorized representative signs the Rules of Engagement, payment is completed, and domain ownership is verified. A plan change requires a new review and approval.
- Prepare monitoring and a baseline. Choose the service paths to watch, the health-check interval, and error-rate, latency, or status-code thresholds. Monitoring starts before the traffic timeline so you can compare the test with normal behavior.
- Run, observe, and stop safely. Dedicated workers execute only the approved timeline. Watch worker progress, aggregate traffic, and service health live; stop manually at any time or let a configured threshold abort the test automatically.
- Review the evidence. The approved plan, command timing and rates, health results, and audit history remain in the workspace. Compare them with your CDN, network, host, and application telemetry to locate the first constrained layer and plan a retest.
How do infrastructure-provider approvals work?
Most production targets depend on several providers: a cloud or hosting platform, network carrier, CDN, DNS service, load balancer, or DDoS-mitigation service. During engagement review, we map that delivery path with you and determine which provider requirements apply to the proposed DDoS simulation.
We work with your team and, where the provider's process requires it, with providers such as Cloudflare, Amazon Web Services (AWS), Microsoft Azure, Google Cloud, DigitalOcean, and others to confirm the permitted target, techniques, traffic levels, test window, monitoring, and emergency contacts.
- Check the current policy. Provider rules differ and can change. A provider may require advance notice, a separate approval, an approved testing provider, or tighter traffic limits.
- Document the permitted test. Required notices, approvals, provider limits, and contacts become part of the engagement review and Rules of Engagement.
- Adjust the plan when necessary. We can reduce rates, change techniques or timing, or exclude infrastructure that a provider has not authorized.
- Do not run without authorization. If a required provider authorization cannot be confirmed, we rescope the engagement or do not run the test.
No blanket approval is implied. Provider names identify infrastructure our customers may use; they do not imply endorsement, certification, or a commercial partnership. The customer remains responsible for permissions required under its provider accounts and contracts.
What should you prepare before requesting a quote?
You do not need a finished test plan, but these inputs make scoping and review faster:
- A concrete objective: the control, limit, service-level objective, or response procedure you want to validate.
- The exact target: domain, public service paths, ports, and environments that are in scope—and the systems that are not.
- The delivery chain: hosting, network, CDN, DNS, mitigation, and other upstream providers that could receive or observe the traffic.
- A candidate profile: relevant techniques, a starting level, maximum rate or concurrency, duration, and whether stages should overlap.
- Health and stop conditions: paths to check, acceptable latency and error rate, expected status codes, and conditions that must end the test.
- People and timing: preferred window, time zone, operational contacts, an emergency contact with authority to stop, and any change or incident records your team requires.
Domain verification is not the same as permission. We help coordinate the provider review, but the customer must obtain every approval required from the system owner and affected hosting, network, CDN, mitigation, or upstream providers. Review our provider-coordination and authorization guide and the Terms of Service before scheduling.
What might a first DDoS simulation look like?
Example objective: determine whether a checkout API remains within its agreed latency and error-rate limits while controlled HTTPS request pressure increases.
Observation: monitor a lightweight health path and the checkout path before, during, and after the traffic timeline. Set automatic abort thresholds for latency, non-success responses, and error rate.
Traffic plan: start below the expected limit, ramp through separately measurable stages, and add another technique only when it answers a specific question and has been approved.
Decision: compare the portal's traffic and health record with CDN, load-balancer, application, and database telemetry. The first threshold crossed tells you where to investigate before repeating the test.
This is an illustration, not a default prescription. Every engagement is bounded to the target's architecture, ownership, provider rules, risk tolerance, and approved objective.
The eighteen simulations
Each page explains the real attack, how we reproduce it in-bounds, what it exercises, and how to run it.
How are DDoS simulations priced?
Every test is priced per engagement. Build a plan—or ask us to design one—then request a quote. There is no subscription and no upfront price to pay before you see the accepted scope and one-off engagement price.
The quote reflects the techniques, command duration and overlap, required rate and concurrency, worker capacity, target infrastructure, scheduling, safety controls, and the work needed to review provider approval. The most aggressive network-layer methods—UDP, SYN, established-connection, QUIC, and DNS floods—receive the closest scrutiny.
You can draft a timeline in the browser without an account. Create a workspace when you are ready to save it and request a quote; domain ownership must be verified before the accepted test runs.
Frequently asked questions
What is DDoS simulation testing?
DDoS simulation testing rehearses a real distributed-denial-of-service attack against infrastructure you own, under controlled conditions, so you can measure how it holds up and fix weaknesses before a real attacker finds them. On ddos-sim.com every run is bounded, targets a verified domain, and can abort itself the moment your service degrades.
Is DDoS simulation testing legal?
It is legal when you test systems you own or are clearly authorized in writing to test. ddos-sim.com enforces this with domain-ownership verification and per-domain limits, and never runs traffic against arbitrary targets. Testing systems you do not own or control may be a criminal offence.
How many attack techniques can I simulate?
Eighteen, spanning Layers 3 to 7: HTTP check, HTTPS flood, SYN flood, TCP connection flood, UDP flood, TCP flag flood, established connection flood, Slowloris, Slow POST, slow read, ICMP flood, SSL/TLS exhaustion, HTTP/2 Rapid Reset (CVE-2023-44487), HTTP/2 CONTINUATION flood, HTTP/2 MadeYouReset, a QUIC/HTTP3 Initial flood, a DNS query flood, and WebSocket exhaustion.
How is DDoS simulation testing different from load testing?
Load testing usually models expected application traffic to measure capacity and performance. DDoS simulation testing deliberately reproduces adversarial traffic patterns to validate availability controls, rate limits, connection handling, monitoring, and incident response. A test plan can use both approaches when the objectives overlap.
Do you coordinate with my cloud or CDN provider?
Yes. During scoping we map the hosting, cloud, CDN, DNS, network, and mitigation providers in the delivery chain and work with your team and, where required, the provider to confirm that the test fits its current policy. This can include Cloudflare, Amazon Web Services (AWS), Microsoft Azure, Google Cloud, DigitalOcean, and others. Depending on the provider, that may mean notice, a separate approval process, an approved testing provider, or tighter limits. If a required authorization cannot be confirmed, we rescope the plan or do not run it.
What do I need before requesting a quote?
Prepare the target, the outcome you want to measure, candidate techniques and scale, a preferred test window, health-check paths and stop thresholds, operational contacts, and any required hosting, network, CDN, or upstream-provider permissions. You can draft a plan and request a quote before domain verification, but ownership verification and all required written authorization must be complete before the test runs.
What can I monitor during a DDoS simulation?
The portal shows the command timeline, worker progress, aggregate traffic, and live service-health checks. Health monitoring tracks latency, HTTP status, and error rate on the paths you choose. Configured thresholds can abort the test automatically, and you can stop it manually at any time.
What information is available after the test?
The approved plan, command timing and rates, health results, and audit history remain visible in the customer workspace. Compare that record with telemetry from your CDN, hosting provider, network, and application to identify the first constrained layer and decide what to change before a retest.
How are DDoS simulations priced?
Each engagement is priced individually. You build a plan (or ask us to design one) and request a quote; we price the specific test and confirm timing. Domain ownership must be verified before it runs, and the most aggressive network-layer methods — UDP, SYN, established-connection, QUIC, and DNS floods — get the closest scrutiny in the manual review every engagement goes through.
Draft a timeline in the browser now — no account needed — then verify a domain when you are ready to run it.
Build a test plan