Denial Of Service
Denial Of Service (DOS) is an attack on a computer or network that prevents legitimate use of its resources.
A denial of service attack is an attempt to make a machine or network resource to the users,Although a target users at a host connected to the internet
Dos attacks typically target sites or services hosted on high profile web servers such as banks,credit cards payment gateways and even root name servers,it is also used in reference to cpu resource management.
As an ethical hacker or security administrator of an organization,you should have sound knowledge of how denial of service and distributed denial of service attacks are carried out, to detect and neutralize attack handlers and to mitigate such attacks
What Is a Denial of Service
Denial of service is an attack on a computer or network that reduces,restricts or prevents legitimate of its resource
In a Dos attack,attackers flood a victim system with non legitimate service requests or traffic to overload its resources.
What Are Distributed Denial of Services Attacks ?
A distributed denial-of-service attack involves a multitude of compromised systems attacking a single target,there by causing denial of service for users of the targeted system
To launch a DDos attack ,an attacker uses botnets and attacks a single system
Symptoms of a Dos Attack
Dos Attack Techniques
Denial Of Service (DOS) is an attack on a computer or network that prevents legitimate use of its resources.
A denial of service attack is an attempt to make a machine or network resource to the users,Although a target users at a host connected to the internet
Dos attacks typically target sites or services hosted on high profile web servers such as banks,credit cards payment gateways and even root name servers,it is also used in reference to cpu resource management.
As an ethical hacker or security administrator of an organization,you should have sound knowledge of how denial of service and distributed denial of service attacks are carried out, to detect and neutralize attack handlers and to mitigate such attacks
What Is a Denial of Service
Denial of service is an attack on a computer or network that reduces,restricts or prevents legitimate of its resource
In a Dos attack,attackers flood a victim system with non legitimate service requests or traffic to overload its resources.
What Are Distributed Denial of Services Attacks ?
A distributed denial-of-service attack involves a multitude of compromised systems attacking a single target,there by causing denial of service for users of the targeted system
To launch a DDos attack ,an attacker uses botnets and attacks a single system
Symptoms of a Dos Attack
- Unavailability of a particular website
- Inability to access any website
- Unusually slow network performance
- Dramatic increase in the amount of spam emails recieved
Dos Attack Techniques
- Bandwidth Attacks
- Service Request Floods
- SYN Flooding Attack
- ICMP Flooding Attack
- Peer to Peer Attacks
- Permanent Denial of service attack
- Applications Level Flood Attacks
BOTNET
- Bots are Software applications that run automated tasks over the internet and perform simple repetitive tasks such as webspidering and search engine indexing
- A botnet is a huge network of the systems and can be used by an intruder to create denial of service attacks
ADVANCED DDoS PROTECTION APPLIANCES
- FortiDDos-300A
- DDos Protector
- Cisco Guard XT 5650
- ARbor Pravail : Availability Protection System
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