Protecting Your Intranet from the Extranet and Internet
Just walked into a Firewall.
5.1 So many choices!
A firewall is a system designed to control access to applications on a network, typically access to a private network from the public Internet. We know that when we connect to the Internet or any outside entity, we need a firewall. There are many different choices when it comes to defining the topology, selecting the vendor, and selecting the type of firewall.
There are three main types of firewall software and hardware configurations:
1. Packet filtering
2. Proxy server or application gateway
3. Circuit-level gateway or generic application ...
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