Workstation User’s Manual
324 VMware, Inc.
Considerations for Using NAT
ConsiderthefollowingitemswhenyouuseNAT:
NATcausessomeperformanceloss.
BecauseNATrequiresthateverypacketsenttoandreceivedfromavirtual
machinemustbeintheNATnetwork,anunavoidableperformancepenalty
occurs.
NATisnotperfectlytransparent.
NATdoesnotusuallyallowconnectionstobeinitiatedfromoutsidethenetwork,
althoughyoucanmanuallyconfiguretheNATdevicetosetupserverconnections.
ThepracticalresultisthatsomeTCPandUDPprotocolsthatrequireaconnection
beinitiatedfromtheservermachine,somepeertopeerapplicat
ions,forexample,
donotworkautomatically,andsomemightnotworkatall.
NATprovidessomefirewallprotection.
AstandardNATconfigurationprovidesbasic‐levelfirewallprotectionbecausethe
NATdevicecaninitiateconnectionsfromtheprivateNATnetwork,butdeviceson
theexternalnetworkusuallycannotinitiateconnectionstotheprivateNAT
network.
Using NAT with NetLogon
WhenyouuseNATnetworkinginavirtualmachinewithaWindowsguestoperating
systemrunningonaWindowshost,youcanuseNetL ogontologintoaWindows
domainfromthevirtualmachine.YoucanthenaccessfilesharesthattheWINSserver
knows.
TouseNetLogon,youneedtoknowhowWINSserv
ersandWindowsdomain
controllerswork.Thissectionexplainshowtosetupthevirtualmachinetouse
NetLogon.Thesetupprocessissimilartothewayyousetupaphysicalcomputeron
oneLANthatisusingadomaincontrolleronanotherLAN.
TologintoaWi
ndowsdomainoutsidethevirtualNATnetwork,thevirtualmachine
needsaccesstoaWINSserverforthatdomain.Youcanconnectthevirtualmachineto
aWINSserverinthefollowingways:
ConnecttotheWINSserverthattheDHCPserverusedontheNATnetwork
provides,iftheWINSserverisalreadysetuponthehost.
ManuallyentertheIPaddressoftheWINSservertoconnectfromthevirtual
machinetoaWINSservernotsetuponthehost.
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