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Book Overview & Buying
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Table Of Contents
Executive's Cybersecurity Program Handbook
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Have you ever heard the phrase “If it’s not the network, it’s the firewall”? It seems like every time I turn around someone is blaming the firewall for their issues. The application doesn’t work? It’s the firewall. The internet’s moving at a crawl? It’s the firewall. Kids won’t listen to you? Blame the firewall!
There seem to be firewalls for just about everything – firewalls for network traffic, firewalls for applications… there are even specific firewalls for DNS traffic. There are plenty of best practices available to protect your internal traffic from the internet. Firewalls are also best known for NAT and port address translation (PAT) (yes, there is a difference). There are also differences between host-based firewalls and all the rest:
Figure 9.3 – Layer 2 firewall design
There are plenty of different types of firewalls out...