How to Perform Denial of Service Attacks in CEH Labs?

Introduction

Denial of Service is a dedicated module in CEH v13 and always appears in practical exam — you get 3–5 easy flags by crashing services, exhausting bandwidth, or application-layer attacks. Understanding SYN flood, Slowloris, amplification is mandatory. At Ethical Hacking Training Institute we provide 50+ real servers (Windows, Linux, Apache, IIS) in isolated lab so you safely practice every DoS technique without legal issues.

Top 10 DoS/DDoS Attacks You Must Know for CEH Exam

Practice DoS attacks safely.

SYN Flood – Most Common DoS Attack

• Spoofed SYN packets → half-open connections
• hping3 --syn -p 80 --flood --spoof IP target
• Exhaust server connection table
• Our lab has Windows & Linux servers

Slowloris & Application Layer Attacks

Slowloris keeps connections open with partial HTTP requests. Works even with low bandwidth. Command: slowloris.pl -dns target.com -port 80 -timeout 30 -num 500. Also try GoldenEye, RUDY. Our lab has Apache & IIS servers for live testing.

Perform Slowloris attack.

UDP & Amplification Attacks

• UDP flood → hping3 --udp --flood target
• NTP, DNS, SSDP amplification
• Spoof source IP → huge response
• 50–100× amplification factor
• Our lab has vulnerable NTP/DNS servers

HTTP Flood & Layer 7 DoS

• GET/POST flood
• LOIC (Low Orbit Ion Cannon)
• GoldenEye tool
• Target specific URLs (login.php)

Botnet Simulation & Distributed DoS

• Use multiple Kali VMs as bots
• Coordinate attacks from different IPs
• Our lab simulates real botnet environment

Simulate botnet attacks.

DoS Prevention Theory You Must Know

• SYN cookies, rate limiting
• WAF, CDN, load balancers
• Ingress filtering
• IDS/IPS signatures

Conclusion: Master DoS in 15 Days Safely

DoS attacks are the easiest flags in CEH practical. Join Ethical Hacking Training Institute and get:

• 50+ real servers for DoS practice
• Pre-configured tools & scripts
• Daily challenges
• Weekend & weekday batches
• 100% placement support

Book free demo — crash first server in 30 minutes!

Avoid common mistakes.

Frequently Asked Questions

How many DoS flags in CEH practical?

3–5 flags guaranteed.

Is hping3 most important?

Yes — for SYN & UDP flood.

Is Slowloris still relevant?

Yes — works on Apache & IIS.

Is LOIC allowed?

Yes — in lab only.

Is amplification attack tested?

Yes — NTP/DNS.

Do you provide real servers?

Yes — 50+ live targets.

Is botnet simulation in lab?

Yes — full environment.

Weekend batch covers DoS?

Yes — full hands-on.

How many tools to learn?

5 main — hping3, Slowloris, LOIC.

Is prevention theory important?

Yes — 4–6 questions.

Can freshers learn DoS?

Yes — easiest module.

Is reporting needed?

Yes — before/after proof.

Do you teach SYN cookies?

Yes — defence theory.

Is lab safe?

Yes — completely isolated.

How to start today?

Book free demo — crash first server in 30 minutes!