Eicon Networks S92 Manual do Utilizador descarregar pdf (Página 93)

YuChakTinMichael‘sGIACGCFWProjectAssignment

Page 93

ConfiguretheSecurityLevel:

Weneedthehighestpossiblelevelofsecurityhere.Tosetsuchsecurity,useCustom

Settings,andsetevery blockingoption toHigh.Allthealertoptionsshouldbe

enabledaswell.

ConfiguretheAdvancedOptions:

Inthe AdvancedOptionssection,enablethefollowingoptions:

n BlockIGMPProtocol:IPmulticastisnottobeusedinournetworkanyway,so

thisoptionshouldbeblocked.

n StealthBlockedPorts:Thiscausestheblockedportstonotrespondtoenquiries

fromtheoutside.Suchoptioneliminatesthehacker’sopportunityoflearningany

unnecessarynetworkinformation.

n BlockFragmentedIPPackets:FragmentedIPpacketsareoftenusedasawayto

attacksystems.Thisoptiondisablessuchthreat.

ConfigureIntrusionDetection:

NortonFirewallcandetectportscanattemptsandautomaticallyblocktheattackers

frommakingfurtherconnectionattempts. Enableallofthesefeatures.

ConfigureLogging:

Weshouldalwaysoptforloggingasmuchinformationaspossible.SettheReporting

LeveltoHighandensurethatyourdriveislargeenoughtoholdthelargeamountof

loggeddata.

BasicTesting: 

n FromInternal_Admin,accessafileshareinInternal_Servers.Therequestshould

succeed.

n FromInternal_Admin,accessaninternetwebsiteviaISA_Cache’sport8080.

Therequestshouldsucceed.

n FromRAS_Net,accessafileshareinInternal_Admin.Therequestshouldfail.

n Inspectthelogfile.

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Eicon Networks S92 Manual do Utilizador Página 93