This document discusses various types of network attacks and countermeasures. It describes mapping to study a victim's network before attacking, packet sniffing where a host can read unencrypted communication, spoofing where an attacker takes a target's IP address to remain anonymous, and DoS/DDoS attacks which aim to overload services and bring them down. Hijacking combines different attack techniques to disrupt an entire network. The document provides details on each attack method and their techniques.

1. Network Attacks
and
Countermeasures

2. What is Attack?
 Attack on Network to cause collateral
damage to the network.
 The main types of Attacks are
Mapping Packet
Sniffing
Spoofing Hijacking DoS and DDoS

3. 1. Mapping
 To study the victim before attacking.
 Continuously monitor the
communication and get the key value.
 IP Address is the best source for this
mapping.
 Mapping is more found in Nmap an
open source default.

4. 2. Packet Sniffing
 A host that receives all the information
between client and server.
 Can water be prevented using
promiscuous mode.
Sending
Password to bob
and rules have
arrived from bob.
Trudy reading
the messages.
Sending
Password to bob
and rules have
arrived from bob.

5. 3. Spoofing
 IP address is the main source.
 Takes a target IP address and
replaces it with Trudy's any IP
address.
 Spoofed IP address leaves the
Network open.
 Using Spoofed IP address Trudy can
undergo various attack and remain
safe.
 Ingress Filter can stop IP Spoofing.

6. 4. DoS and DDoS
 Stop a service by overloading it.
 SYN Flooding Attack- opening up the
systems of network and stopping the
handshake.
 Smurf Attack- Innocent hosts
responding to spoofed IP address.
 DDoS is highly planned method, which
works like virus spreading in body.

7. DDoS Attack

8. 5. Hijacking
 Combinational off all to disrupt the
network.
 Hacking can be carried over a
individual system or the server of an
organization.
 Havoc.. Havoc.. Havoc…