The trust now everybody to Windows firewall this name is not very strange, but many Windows users can choose this firewall procedure closure, uses the third party firewall. Is actually the Windows firewall is not easy to use because of other reasons? Today we understood Windows firewall these everybody rarely has the understanding the thing.
We knew first what is a firewall? The firewall is together the hardware or the software, plays the role in the networking environment, avoids some correspondences which in the security policy forbids, “the firewall” the function is similar with the construction. It has the control information basic duty in the different trust region. Model trust region including Internet (a trust region) and an internal network (a high trust region). The ultimate objective is provides is controlled the connectivity acts according to the least privilege principle in the different level trust region through security policy execution and between the connective model.
Windows XP the SP2 firewall regarding will only use system bringing and so on browsing, email network application procedures, the Windows firewall will simply not have the influence. That is, with system bringing and so on IE, OutlookExpress procedures carries on the network connections, the firewall is the default does not intervene. Microsoft when establishes the firewall built-in rule, had already operated “the green passage” for own application procedure, after therefore installs SP2, even if turns on its firewall, and begins using “does not permit the exception”, does not need to add to IE “the exception” to be able to access the net, but the firewall will not inquire whether can allow IE to pass.
Windows firewall
The Windows firewall only obstructs all spreads without the request current capacity, spreads the current capacity to the initiative request not to do pays attention. But the third party firewall can carry on the monitoring and the verification generally visit to two direction, this point is between them the biggest difference. This is also the user abandons one of Windows firewall's reasons.
After installing Microsoft Windows XP Service Pack 2 (SP2), some application procedure is possibly unable on the renewal operating system to move. This is because in default situation, to enhance based on the Windows XP SP2 computer's safety performance, the Windows firewall to begin using the condition and not shield the external connection which approves.
We have a look at the following this chart first, so long as the Windows firewall opens user, when surfer sees.
“Windows safety alarm” dialog box
The Windows firewall does not make any processing to this initiative outputting request, probably does not have the firewall to be the same, after input account information, registered the game platform, QQGame already had in fact completed toward the outside the network visit; By now needed to play the information to download to local (has the exterior visit request), the firewall has sprung “the Windows safety alarm”.
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