Presentation Packet filtering attack.pptx

This presentation shows us packet filtering attack. Know about firewall it types know about packets and more

1. Packet filtering attack Presented by: Jehanzeb Buledi

2. Milestones For understanding Know about Firewall Types of firewall Know about Packet Packet filtering (type of firewall) Packet filtering attack

3. What is firewall? Let’s take an real life example before knowing that what actually firewall is Example: Airport checking Before entering in airport we must have to cross security barrier. Cross metal detector Personally checked by guard

4. So that a person is restricted or prohibited of some specific items according to the rules of airport authority (For security purpose) Ex: Gun, Knife e.t.c

5. If packet is safe then no problem and firewall declare secure to packet. If packet is malicious then it will declared unsecured and cant enter in internal network.

6. Firewall is a network device that protect internal network. It is preventing our unauthorized access to or from our internal network.

7. Types of firewall Packet Filtering Application level gateway

8. Packet filtering(know Packet) Firstly knowing that what is packet? A unit of data which based on two main components HEADER and PAYLOAD In header we have so many things about packet Like  Source Address(SA), Destination Address(DA), Port Number(PN) e.t.c In Payload we have the actual data or message.

9. Packet Filtering Internet Private network 1 2 3 4 PFR Firewall(Packet Filtering)

10. Set of rules In packets filtering we have set of rules that data packet must carry if not it will not allow to enter in private network . Set of rules based on? HEADER of packet .Source address .Destination address .Port Number .Protocol

11. If rules matched then forward or discard If by chance packet does not match any rule so firewall will do default action means discard the packet.

12. Attack on packet filtering Packet filtering attack is that type of attack in which attacker use the packet filtering mechanism for attack. So that attacker access unauthorized data. In this attack for misguiding the packet filtering system attacker manipulate the packet so that attacker cross the firewall (packet filtering) and he can send or cross the malicious or unauthorized traffic from packet filtering.

13. Here are some common packet filtering attack IP Spoofing : In this attack , attacker modify the source IP address of packet which is required to that firewall so that packet can cross the firewall. Packet Fragmentation : In this attack, attacker breaking up the packet into smaller fragments to avoid packet filtering(Firewall). In set of rules of packet filtering there is size mentioned of packet attackers just have to meet the size of packet or less than mentioned size in this way fragments will go through from firewall and after reaching the destination fragment will reassemble in full malicious data or packet in which data is malicious

14. DOS (Denial of service) : In this attack, attacker’s aim is to overwhelm a network or specific target with a flood of traffic. Attacker wants to weak packet filtering so in that time attacker will take advantage and bypass the malicious data

15. THANK YOU 😊