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Ch20

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Joe Christensen
Joe Christensen
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Cryptography and Network Security Third Edition by William Stallings Lecture slides by Lawrie Brown
Chapter 20 – Firewalls ,[object Object],[object Object]
Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What is a Firewall? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Firewall Limitations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Firewalls – Packet Filters
Firewalls – Packet Filters ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Firewalls – Packet Filters
Attacks on Packet Filters ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Firewalls – Stateful Packet Filters ,[object Object],[object Object],[object Object],[object Object]
Firewalls - Application Level Gateway (or Proxy)
Firewalls - Application Level Gateway (or Proxy) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Firewalls - Circuit Level Gateway
Firewalls - Circuit Level Gateway ,[object Object],[object Object],[object Object],[object Object],[object Object]
Bastion Host ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Firewall Configurations
Firewall Configurations
Firewall Configurations
Access Control ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Access Control Matrix
Trusted Computer Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Bell LaPadula (BLP) Model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Reference Monitor
Evaluated Computer Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Ch20