VMware Workstation 7 User Manual download pdf (Page 307)

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Chapter 15 Advanced Virtual Networking

Ifthehostcomputerhasmultiplenetworkadapters,itmightbeintentionally

configuredtouseIPforwarding.Ifthatisthecase,youdonotwanttodisable

forwarding.Toavoidpacketleakage,youmustenableapacketfilteringfacility and

specifythatpacketsfromthehost‐onlynetworkshouldnotbese

ntoutsidethehost

compu

ter.Consultyouroperatingsystemdocumentationfordetailsonhowto

configurepacketfiltering.

Disable Packet Forwarding on Windows Hosts

SystemsusingserverversionsofWindowsoperatingsystemscanforwar dIPpackets

thatarenotaddressedtothem.Bydefault,thesesystemsandWindowsVistaand

Windows7systemshaveIPpacketforwardingdisabled.IPforwardingisnota

problemonWindows XPProfessionalorWindows XPHomeEditionhosts.

Ifyoufindpacketsleakingfromahost‐onlynetw

orkonaWindowshostcomputer,

checkwhetherforwardingwasenabledonthehostmachine.Ifitisenabled,disableit.

To disable packet forwarding on Windows hosts

Dooneofthefollowing:

 StoptheRoutingandRemoteAccessservice:

a ChooseStart>Runandenterservices.mscintheRundialogbox.

bIntheServiceswindowthatappears,disabletheRoutingandRemoteAccess

service.

 UseWindowsAdministrativeToolstodisableroutingandremoteaccess:

aOnaWindows2003Serverhost,chooseStart>Programs>Administrative

Tools>RoutingandRemoteAccess.

Aniconontheleftislabeledwiththehostname.Ifagreendotappearsover

theicon,IPforwardingisturnedon.

oturnoffIPforw

arding,right‐clicktheiconanddisableRoutingand

RemoteAccess.

Areddotappears,indicatingthatIPforwardingisdisabled.

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VMware Workstation 7 User Manual Page 307