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Final Presentation

Final Presentation . Topics 1) Firewalls 2) Virtual Private Networks 3) Secure Socket Layer By, Adil Siddiqui. Firewalls. What is a Firewall?

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Final Presentation

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  1. Final Presentation Topics • 1) Firewalls • 2) Virtual Private Networks • 3) Secure Socket Layer By, Adil Siddiqui

  2. Firewalls What is a Firewall? • General Definition : - It prevents unauthorized access into your computer. • Technical Definition : - It is the combination product that provide the function of screening routers, proxy servers, network address translation, plus stateful inspection.

  3. Firewalls Advantages of Firewalls : - • More secure environment then can be achieved through simple packet filtering. • This method prevents rogue processes from establishing unauthorized network connections. • It prevents someone from utilizing a port inadvertently left open or unguarded for attacking the system. • Firewalls can also hide servers, examine contents, and rewrite packets.

  4. Firewalls Disadvantages of Firewalls : - • Firewalls are expensive • Need to be replicated at every entrance to the network. • Require significant scripting and configuration management to maximize their effectiveness.

  5. Virtual Private Networks What is a VPN ? • VPN are a significant advantage in recent technology. They provide secure and cost effective networking. • The VPN utilize a technology known as private tunneling to provide a secure pathway over a public network.

  6. Virtual Private Networks Two Modes of VPN • Transport Mode : - Uses encryption on the data part of the packet only. • Tunnel Mode : - Everything gets encrypted (headers and information sections of the packet)

  7. Two Modes of VPN

  8. Virtual Private Networks • VPN can be deployed in three ways : • Host to host • Site-to-Site • Host-to-Site

  9. Possible Configurations of VPN

  10. Virtual Private Networks Drawbacks : - • During a VPN session while all the traffic in the tunnel is considered secure, Trojans can become dangerous. • Key Management issues arise with increase of the tunnels.

  11. Secure Socket Layer What is an SSL ? • SSL was originally developed by Netscape to provide secure communications between Web clients and servers. • It has grown to take on a prominent role in secure commications for Web transactions, FTP exchanges, and secure e-mail.

  12. Secure Socket Layer • The cryptographic technique is complex. • The majority of that complexity is found in the establishment procedure.

  13. SSL Handshake

  14. Secure Socket Layer • SSL provides a trusted relationship built on a temporary basis with no prior knowledge of the recipient necessary.

  15. Question? What are the two modes of VPN that can be deployed? • Transport Mode • Tunnel Mode

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