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2. Objectives Understand how subnets and firewalls can be used to create different security zones, such as a DMZ Describe different types of firewall and the basics of configuring a software firewall Identify different malicious software threats and security software and policies to defend against them 2.5 Server SecuritySlide 2

3. Subnets and Zones 2.5 Server SecuritySlide 3

4. DMZ Screened subnet Three-legged firewall Screened host 2.5 Server SecuritySlide 4

5. Firewalls and Proxy Servers NAT Packet filtering Circuit-level gateway Application-layer gateway Stateful Multilayer Inspection 2.5 Server SecuritySlide 5

6. Installing and Configuring Firewalls 2.5 Server SecuritySlide 6

7. Proxy and Filter Servers Proxy Server – Filter traffic – Cache pages – Pre-fetch pages Reverse Proxy – Publishes private server to public Internet Filter / Gateway 2.5 Server SecuritySlide 7

8. Malware 2.5 Server SecuritySlide 8 Virus / worm – Boot sector viruses – Program viruses – Multipartite viruses – Worms – Script viruses Spyware, Adware, and Trojans

9. Anti-Virus Software Virus identification Removal / quarantine Policies 2.5 Server SecuritySlide 9

10. Review Understand how subnets and firewalls can be used to create different security zones, such as a DMZ Describe different types of firewall and the basics of configuring a software firewall Identify different malicious software threats and security software and policies to defend against them 2.5 Server SecuritySlide 10

11. Labs Lab 7 Configuring Server Security 2.5 Server SecuritySlide 11