1 / 22

Firewalls

Firewalls. Firewalls. Most widely sold solution for Internet security Not a substitute for proper configuration management. Types of Firewalls. IP packet level TCP session level Application level Dynamic packet filtering NATs, Logging Ingress vs. Egress filtering. OSI Model Layer.

esme
Download Presentation

Firewalls

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Firewalls

  2. Firewalls • Most widely sold solution for Internet security • Not a substitute for proper configuration management

  3. Types of Firewalls • IP packet level • TCP session level • Application level Dynamic packet filtering • NATs, Logging • Ingress vs. Egress filtering

  4. OSI Model Layer Firewall Functionality Packet filtering, Address filtering, packet filtering firewall 7 - Application Application Level Proxies, forward and reverse proxies 6 - Presentation 5 - Session Stateful Firewall 4 – Transport – TCP/UDP Port filtering, circuit level proxy 3 – Network - IP 2 – Data Link 1- Physical Firewalls and OSI Layers

  5. Packet Filters

  6. Network Topology and Address Spoofing

  7. Routing Filters • Perfect security if the node is completely unreachable

  8. Stateful Packet Filters (SPFs)

  9. Packet Filtering Performance

  10. Proxy Firewalls

  11. Circuit Level Proxy

  12. Application Proxy

  13. Caching Proxies

  14. Network Address Translation (NAT)

  15. Logging

  16. Firewall Pitfalls

  17. Where to Put FW

  18. Where (cont’d)

  19. DMZ

  20. Distributed Firewalls (DFWs)

  21. Switched Firewalls (Air-gap Technology)

More Related