network security / information security


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power point presentation for national level technical seminar in 2013 featuring network security in limelight

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network security / information security

  1. 1. Router Simulation System for mitigating Network Security attacks Rohan Choudhari BE(IT) AEC,Beed
  2. 2. Background for This Project?
  3. 3. Basics of InfoSec Confidentiality Integrity Availability Prevents Unauthorized use or disclosure of information Safeguards the accuracy and Completeness of information Authorized users have reliable And timely access to the resources
  4. 4. Why Security ?  The internet was initially designed for connectivity (ARPANET).  Trust Assumed  We do more with the internet nowadays  Security protocols are added on the top of TCP/IP  Fundamental aspects of information must be protected .  Confidential data  Employee information  Business models  Protect identity and resources  We can’t keep ourselves isolated from the internet  Most business communications are done online  We provide online services  We get services from 3rd party organizations
  5. 5. Attacks on different layers Layer 7: DNS ,DHCP,HTTP,FTP,IMAP,LDAP,NTP,SSH, SMTP, SMNP, Telnet,TFTP Layer 5 :SMB, NFS,Socks Layer 3 :IPv4,IPv6,ICMP Layer 2 :PPTP , Token Ring DNS poisoning, phishing, SQL injection TCP Attack , Routing attack, SYN flooding, Sniffing Ping ,ICMP ,Flood ARP Spoofing ,MAC Flooding
  6. 6. TCP Attacks Exploits the TCP 3 way handshake Attacker sends a series of SYN packets without replying the ACK packet Finite queue size for incomplete connections SYN ACK SYN+ACK SERVER
  7. 7. TCP Attacks Exploits the TCP 3 way handshake Attacker sends a series of SYN packets without replying the ACK packet Finite queue size for incomplete connections SYN SYN+ACK SERVER (victim)ACK ?
  8. 8. DNS cache poisoning client I want to access DNS catching server 1 2 QID =64571 Root /GTLD ns.example.comwebServer 3 3 QID =64571 QID=64569 QID=64570 QID=64571 Match ! (Pretending to be Authoritative zone)
  9. 9. Common Types of attacks Reconnaissance-ping sweeps and port scans Sniffing –capture packet as they travel through the network Man-in–the-middle-attack: intercepts messages that are intended for a valid device. Spoofing –sets up a fake device and trick others to send messages to it. Hijacking- taking control of session Denial of service (DoS) Dynamic DoS (DDoS)attack
  10. 10. Trusted Network Standard defensive-oriented technologies  Firewall-first line of defense  Intrusion Detection  Build TRUST on top of the TCP/IP Infrastructure  Strong authentication  Two factor authentication  Something you have + something you know  Public key infrastructure (PKI)
  11. 11. Access control Access control – ability to permit or deny the use of an object by a subject It provide 3 essential services (known as AAA)-  Authentication-(who can login)  Authorization - (what authorized users can do )  Accountability –(identifies what a user did )
  12. 12. Important Steps to Security • Password Protection • Protecting the network by filtering Network Access and Traffic (i.e. Firewall) • Running Security Audits • Examine and monitor log files • Use commonense: avoid dumpster divers and social engineers
  13. 13. Firewalls A firewall is a computer, hardware, or even a piece of software that sits between your network and the Internet, the firewall attempts to regulate and control the flow of information preventing an array of potential attacks.  A router utilizing Network Address Translation(NAT)  Software firewalls such as Zone Alarm, Kerio Firewall, Outpost, etc.  Hardware firewalls such as Sonic’s SOHO firewall.  Operating system firewalls Ex.Window XP’s built in filtering .
  14. 14. Virtual Private Network Creates a secure tunnel over a public network  Client-to-firewall , router-to-router , firewall-to- firewall VPN protocol standards:  PPTP-(Point-to-Point Tunneling protocol)  L2F -(Layer to Forwarding Protocol)  L2TP-(Layer to tunneling Protocol)  IPSec(Internet Protocol Security)
  15. 15. Significance of this project It makes your computer a router !  And a Gateway router too!! Benefits:  Test new configurations New routing policies New protocols  Don’t disturb the production network  Use cheap PCs instead of expensive routers.
  16. 16. Screenshots of project
  17. 17. Choosing simulation Environment
  18. 18. Output screen showing proposed network infrastructure in a simulated environment
  19. 19. Mesh Topology
  20. 20. Bus Topology Simulation
  21. 21. Choosing various routing algorithms for simulaion
  22. 22. Simulating Source Routing Algorithm
  23. 23. Finding Algorithmic Efficiancy
  24. 24. Magic Starts Here …
  25. 25. conclusion The Simulator takes the configurations of the subnet as Input and gives the different statistics of the routers and links. By changing the routing algorithms and the different network configurations and recording the results we obtain the optimal algorithm. The optimal algorithm for a particular network is obtained by analyzing the results obtained. Simulation helps to achieve an optimal path that reduces the cost of routing and helps to maintain network efficiency very easily.
  26. 26. Conclusion And Future Scope The smaller networks can be analyzed and the results can be employed in larger networks to make routing efficient and economic. As the Simulator has provision for the crashing of routers, it gives an idea of which path is followed when a crash occurs. It can be employed in real networks to increase the performance of routers and links. As it not feasible in real networks to test algorithms and then implement a best one, Routing Simulation System can be helpful in maintaining Network Security. Hence it is useful for people who provide networking services and those who design networks.
  27. 27. Thank You ! Rohan Choudhari BE(IT) AEC,Beed