Dos attack
- 1. DOS ATTACK PRESENTED BY, SURAJ SHARMA
- 2. CONTENTS What is DoS? Recent attack on web. Method of attack. Performing DoS attacks. How do we know an attack is happening? What to do if we are experiencing an attack? How do we avoid being part of the problem? Conclusion
- 3. DENIAL OF SERVICE (DOS) Its an attack to make a machine or network resource unavailable to its intended users .
- 4. METHOD OF ATTACK ICMP flood Teardrop attacks Permanent denial-of-service attacks Reflected / spoofed attack Low-rate Denial-of-service attacks Peer-to-peer attacks
- 5. SOME BEST DOS ATTACK METHOD ICMP flood: Sends packets to all computer hosts rather than a specific machine. Teardrop attacks: Fragmented over-size pay-loads to be send to the target machine. Permanent denial-of-service attacks: It may cause replacement of hardware also.
- 6. PERFORMING DOS ATTACK • A wide range of programs are used to launch DoS attacks. Some of those are………….. Jolt Bubonic Targa Blast Panther Crazy Pinger
- 7. SOME BEST DOS ATTACK TOOLS o JOLT: ⁻ Find exploit vulnerability in windows networking code. ⁻ Consumes 100% CPU times by sending heavy CPU consuming package. o LATIERRA: ⁻ It sends TCP packets to more than one port number. o NEMSEY: ⁻ Generates random packets with random port number and flood victim with it.
- 8. HOW DO WE KNOW AN ATTACK IS HAPPENING? • Unusually slow network performance (opening files or accessing websites) • Unavailability of a particular website • Inability to access any website • Dramatic increase in the amount of spam you receive in your account
- 9. A COMMON MESSAGE AFTER DOS
- 10. WHAT TO DO IF WE ARE EXPERIENCING AN ATTACK? Contact your network administrators. In case of home computer, consider contacting your internet service provider (ISP). Immediately get disconnected from internet.
- 11. HOW DO WE AVOID BEING PART OF THE PROBLEM? • Install and maintain anti-virus. • Install a firewall. • Configure the firewall to restrict incoming and outgoing traffic. • Follow good security practices for distributing your email address. • Applying email filters may help you to manage unwanted traffic.
- 12. CONCLUSION Susceptibility to attacks could be alleviated with better internet. Don’t leave all the decision making to the machines. Provide ‘intelligent’ support along the path. Create “Hardened” networks.