The Internet is a computer network, which is open to the world, the consequences will be the responsibility is not connected to the Internet network security assurance. This means that if there is no established network operators, system carefully, it is most likely the network and the Internet easily who is not a legal person from external access. This is the task of network operators to reduce these risks to a minimum. Strategic choice and skills network administrator can easily identify a network of permeable or not.
Firewall is a tool to achieve security policy (security policy). While the security policy, based on the balance between the facilities provided security. More stringent security policy, a more complex service configuration information or fewer devices available on the network. On the contrary, more and more facilities are available or in such a simple configuration application, more easily and people deal with ‘gossip’ into the system from outside Lai (a weak safety policy of the Zhijie results).
This article will attempt to look at some common security policies, a network connection to the Internet.
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