Internet Firewall Security 
Internet Firewall: Proxy Servers ( )
Proxy services can provide additional security in addition to firewalls. Inspecting the way they work reveals they may also be considered firewalls themselves.
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Internet Firewall: Hardware/Network Layer Firewalls ()
In this article, we shall take a look at how hardware-based or network layer firewalls work and how they differ from firewall software.
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Internet Firewall: Firewall Software ( )
Firewalls come in two variants: hardware and software. Most firewalls of the latter type are personal firewalls, which are programs installed on a computer that control communications made to and from that PC.
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