Specifications

Table Of Contents
VMware Server Virtual Machine Guide
190 VMware, Inc.
If!you!want!all!users!to!be!able!to!set!the!virtual!Ethernet!Adapter!(/dev/vmnet0!in!our!
example)!to!promiscuous!mode,!you!can!simply!run!the!following!command!on!the!
host!operating!system!as!root:
chmod a+rw /dev/vmnet0
Understanding NAT
Network!address!translation,!or!NAT,!provides!a!simple!way!for!virtual!machines!to!
use!most!client!applications!over!almost!any!type!of!network!connection!available!to!
the!host.!The!only!requirement!for!NAT!is!that!the!network!connection!must!support!
TCP/IP.!
NAT!is!useful!when!you!have!a!limited!supply!of
!IP!addresses!or!are!connected!to!the!
network!through!a!nonEthernet!network!adapter.!NAT!works!by!translating!
addresses!of!virtual!machines!in!a!private!VMnet!network!to!that!of!the!host!machine.!
When!a!virtual!machine!sends!a!request!to!access!a!network!resource,!it!appears!to!the!
network!
resource!as!if!the!request!came!from!the!host!machine.
NAT!uses!the!host’s!own!network!resources!to!connect!to!the!external!network.!Thus,!
any!TCP/IP!network!resource!to!which!the !host!has!access!should!be!available!through!
the!NAT!connection.!
The!chief!advantage!of!NAT!is!that!it!provides!a!
transparent,!easy!to!configure!way!for!
virtual!machines!to!gain!access!to!network!resources.
The!following!sections!provide!more!information!about!NAT:
! “Using!NAT”!on!page 191
! “The!Host!Computer!and!the!NAT!Network!on!page 191
! “DHCP!on!the!NAT!Network”!on!page 191
! “DNS!on!the!NAT!Network”!on!page 191
! “External!Access!from!the!NAT!Network”!on!page 192
! “A d va n c e d !NAT!Configuration”!on!page 193
! “Custom!NAT!and!DHCP!Configuration!on!a!Windows!Host”!on!page 196
! “Considerations!for!Using!NAT”!on!page 198
! “Using!NAT!with!NetLogon”!on!page 198
! “Sample!Linux!vmnetnat.conf!File”!on!page 200