Network Attacks and

Countermeasures

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

1. MappingTo 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.

2. Packet SniffingA 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.

Sending Password to

bob and rules have arrived

from bob.

Trudy reading the messages.

3. SpoofingIP 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.

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.

DDoS Attack

5. HijackingCombinational off all to disrupt

the network.Hacking can be carried over a

individual system or the server of an organization.

Havoc.. Havoc.. Havoc…