Denial of Service Attack to deny legitimate user

1. DOS ATTACK
Deny legitimate use

2. Contents
• WHAT IS DOS ATTACK
• TYPES
• PREVENTION

3. Introduction
DOS is an attack used to deny legitimate users access to a resource such as
accessing a website, network, emails, etc. or making it extremely slow.
DoS is the acronym for Denial of Service. This type of attack is usually
implemented by hitting the target resource such as a web server with too many
requests at the same time.
This results in the server failing to respond to all the requests. The effect of this
can either be crashing the servers or slowing them down.

4. TYPES OF DOS ATTACK
•DoS– this type of attack is performed by a single host
•Distributed DoS– this type of attack is performed by a number of compromised
machines that all target the same victim. It floods the network with data packets

5. DoS Protection: Prevent an attack
An organization can adopt the following policy to protect itself against
Denial of Service attacks.
•Attacks such as SYN flooding take advantage of bugs in the operating
system. Installing security patches can help reduce the chances of such
attacks.
•Intrusion detection systems can also be used to identify and even stop
illegal activities
•Firewalls can be used to stop simple DoS attacks by blocking all traffic
coming from an attacker by identifying his IP.
•Routers can be configured via the Access Control List to limit access to the
network and drop suspected illegal traffic.