网络平安与防火墙Abstract:Asthekeyfacilitythatmaintainsthenetworksecurity,firewallstakethepurposeofestablishinganobstaclebetweentrustandtrustlessnetwork,andputcorrespondingsafetystrategyintopractice.Inthispaper,thecomputernetworksecurityandthetechniquesoffirewallsweremainlydiscussed,theconceptandclassificationofthefirewallswereintroduced.Italsointroducedthreekind'sofbasicimplementtechniquesofthefirewalls:Packetfiltering,ApplicationProxyandMonitormodelindetail.FinallydescribedthetrendofdevelopmentofthefirewallstechniquesinInternetbriefly.
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