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What's firewall

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What's firewall

Postby guest » Tue May 20, 2014 11:00 am

Firewall is a software or hardware device that filters information comes from the Internet to a private LAN. The features of firewall:
1. Packet filtering.
2. Network Address Translation (NAT). Port Address Translation (PAT)
3. Virtual Private Network (VPN).
4. Intrusion Prevention.
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