Types of DoS Attacks DoS attacks பல வகையாக இருக்கி……
Types of DoS Attacks
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Algorithm
1. Volumetric Attacks…
இந்த attack-ன் main idea: Huge amount of traffic அனுப்பி bandwidth-ஐ fill செய்வது. Flow: Attacker ↓ Mas……
Memory Trick
Volume = அதிக traffic…
Memory Trick
1. Protocol Attacks…
Memory Trick
இந்த attacks network protocols-ன் working mechanism அல்லது resource limitations-ஐ exploit செய்கின்றன. Mainly ……
Memory Trick
1. Application Layer Attacks…
Memory Trick
இந்த attacks direct-ஆக application அல்லது web server-ஐ target செய்கின்றன. Examples: HTTP Flood Slowloris Repe……
Explanation
Example
GET /home GET /home GET /home GET /hom……
Output
Result
Slowloris Slowloris attack-ல் attacker: Connection open செய்வார். ஆனால் complete request அனுப்பா……
Important
Key Point
Slowloris = Slow incomplete HTTP requests Important……
Important
1. UDP Flood…
Important
UDP packets அதிகமாக target-க்கு அனுப்பப்படும்……
Output
Result
Protocol: UDP…
Algorithm
1. ICMP Flood…
ICMP Echo Request packets தொடர்ந்து அனுப்பப……
Output
Result
இதனை பொதுவாக: Ping Flood என்ற……
Algorithm
1. SYN Flood…
TCP handshake incomplete ஆக வைத்தி……
Algorithm
1. HTTP Flood…
Large number of HTTP GET அல்ல……
Algorithm
1. DNS Amplification Attack…
Attacker ஒரு small DNS request அனுப்புவார். Source IP-ஐ victim IP போல spoo……
Algorithm
1. Reflection Attack…
Attacker direct-ஆக victim-ஐ attack செய்யாமல் மற்ற servers-ஐ பயன்படு……
Algorithm
1. Ping of Death…
Malformed / oversized packets பயன்படுத்தப்படும……
Algorithm
1. Smurf Attack…
Main components: ICMP + Broadc……
Algorithm
1. Slowloris…
ஒரே நேரத்தில் many HTTP connections open செய்……
Algorithm
1. Teardrop Attack…
Teardrop attack fragmented IP packets-ஐ abnormal overlapping fragments ஆக அனுப்புக……
Algorithm
1. LAND Attack…
LAND attack-ல் packet-ன்: Source IP = Victim IP Destination IP = Victim IP அ……
Memory Trick
LAND = Source and Destination……
Memory Trick
1. Connection Exhaustion Atta……
Memory Trick
Server-க்கு limited number of concurrent connections இருக்கும். Attacker: Many connections c……
Memory Trick
1. Resource Exhaustion Attack…
Memory Trick
Attacker server resources-ஐ consume ச……
Output
Result
Algorithm
1. Amplification Attack…
Basic idea: Small attack traffic → Large victim traffic Common example: DNS……
Easy Classification…
Remember
VPA V = Volumetric P = Protocol A = Application Layer Volumetric Traffic அதிகம். Examples: UDP Flood ICMP Flo……
MCQ
Which DoS attack creates half……
MCQ
Which attack primarily uses I……
MCQ
Which attack exploits IP frag……
MCQ
Slowloris mainly targets:…
MCQ
Smurf attack mainly uses:…
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