Eicon Networks S92 Manuale Utente Scaricare il pdf (Pagina 75)

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

Page 75

Keepinmind,SYNGatewayisresourceintensive.Itdoesproducenegative

performanceimpact.Therefore,thesystemrunningthisservicemustbeofreasonably

highstandard.

3,

Configurethefollowingrules:

n Allowonly HTTPandHTTPStraffictoWWW.

n Allowonly DNSUDPtraffictoDNS(DNSTCPtrafficmeanszonetransfer.We

donotwantthatatall).

n Allowonly SMTPtraffictoEmail.

n Dropeverythingelse.Althoughbydefaulteverythinggetsdroppedanyway,but

anexplicitdropwillgeneratelogsforthecorrespondingevents,whileanimplicit

dropwillnot.Wewanttologasmuchinformationaspossible.

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Eicon Networks S92 Manuale Utente Pagina 75