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Outline of Presentation Outline of Presentation

The Nature of Today’s Attackers The Nature of Today’s Attackers

What Is a Firewall ? What Is a Firewall ?

What Is a Firewall ? What Is a Firewall ?

Firewalls History Firewalls History

Firewalls History Firewalls History

Firewalls History Firewalls History

What Firewalls Cannot Do What Firewalls Cannot Do

What Firewalls Cannot Do What Firewalls Cannot Do

How Firewalls Work How Firewalls Work

How Firewalls Work How Firewalls Work

Types of Firewalls Types of Firewalls

Types of Firewalls Types of Firewalls

Packet Filtering Firewall Packet Filtering Firewall

Packet Filtering Firewall Packet Filtering Firewall

Packet Filtering Firewall Packet Filtering Firewall

Packet Filtering Firewall Packet Filtering Firewall

Packet Filtering Firewall Packet Filtering Firewall

Packet Filtering Packet Filtering

Packet Filtering Packet Filtering

Stateful Packet Inspection Stateful Packet Inspection

Stateful Packet Inspection Firewall Stateful Packet Inspection Firewall

Stateful Packet Inspection Firewall Stateful Packet Inspection Firewall

Stateful Packet Inspection Firewall Stateful Packet Inspection Firewall

Stateful Packet Inspection Firewall Stateful Packet Inspection Firewall

Stateful Packet Inspection Stateful Packet Inspection

Stateful Packet Inspection Stateful Packet Inspection

Application Gateways/Proxies Application Gateways/Proxies

Application Gateways/Proxies Application Gateways/Proxies

Application Gateways/Proxies Application Gateways/Proxies

Application Gateways/Proxies Firewall Application Gateways/Proxies Firewall

Application Gateways/Proxies Firewall Application Gateways/Proxies Firewall

Application Gateways/Proxies Application Gateways/Proxies

Application Gateways/Proxies Application Gateways/Proxies

Adaptive Proxies Adaptive Proxies

Circuit-level Gateway Circuit-level Gateway

Types of Firewalls Types of Firewalls

Types of Firewalls Types of Firewalls

Types of Firewalls Types of Firewalls

Types of Firewalls Types of Firewalls

Firewall Architecture Firewall Architecture

Packet Filtering Router Packet Filtering Router

Screened Host (Bastion Host) Screened Host (Bastion Host)

Screened Host (Bastion Host) Screened Host (Bastion Host)

Dual-homed Gateway Dual-homed Gateway

Screened Subnet or Demilitarized Zone (DMZ) Screened Subnet or Demilitarized Zone (DMZ)

Do you need a firewall? Do you need a firewall?

Do you need a firewall? Do you need a firewall?

Do you need a firewall? Do you need a firewall?

Selecting Firewall Solution Selecting Firewall Solution

Security Policy Security Policy

Security Policy Security Policy

Implementations Implementations

Conclusion Conclusion

Q&A Q&A