Firewalls , VLANs & proxy servers
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projectsofme
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Posts: 1,124
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#1
04-10-2010, 11:25 AM



.ppt   firewalls.ppt (Size: 755.5 KB / Downloads: 134)
This article is presented by:
Neelam choudhary
IT(c-2)


Firewalls

+Sits between two networks
Used to protect one network from the other
It may be a hardware device or a software program running on a secure host computer
What does a firewall do?


-A firewall examines all traffic routed between the two networks to see if it meets certain criteria
-A firewall filters both inbound and outbound traffic.
-Firewalls can filter packets based on their source and destination addresses and port numbers.
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