2. Find the “PortNumber” subkey (3389). Modify the port number in Hex and save the new value.

After this is done To access this server from another machine using RDP make sure you type in the remote computers IP:portnumber E.G 192.168.1.23:50501

So now that you got a brief lesson why how NLB Service can help you, here’s the best part, It’s FREE.  Microsoft has included this great clustering service for free, and it actually works.

I currently run 14 servers using NLB; 32 is the limit for NLB so keep that in mind. It also can be managed centrally, so that is also great. Now with all the fluff out of the way lets get down to setting it up.  Read my article on why NLB Rocks its called NLB Rocks

Step 1.
Go to the properties of the Network Adapter on the server and click Network Load Balancing and click OK.  If service is not in the list go to Install and select Network Load Balancing.

Step 2
Go to Administrative Tools –> Network Load Balancing Agent

Step 3
Once in the manager click Cluster and select NEW

Step 4
Here is where it will ask for the Cluster IP Information.  This is the Virtual IP that will be shared between servers.  I will enter some sample data to continue.  For the full Internet name you can leave this is as default or if you are only going to be serving one web domain off this cluster type in the name if you like, but this setting doesn’t affect NLB.  Keep Unicast enabled for simplification.  I don’t recommend the allow remote control for security reasons.  Click next to continue

Step 5
Here you can specify more virtual IP’s that the servers in this cluster will load balance.  This is useful if you have multiple Web domains in IIS.  That way all the web domains are being load balanced.  I will not add any now, but we can always add them later.

Step 6
The next part is port rules.  It is important to make sure you only add the ports you want, the default is everything.  These are the ports the NLB Service will respond too.

Step 7
For web servers generally 80 and 443 are needed.  Specify the port range, and select the affinity.  Affinity is how the request gets handled.  If single affinity is selected that means when a person connects to you web server on a port lets say 80 to browse a page, the person will stay on that server.  The persons web  session connection will stay with that server only.  This is very important for SSL.  SSL needs to be single affinity or it will not work.  If no affinity is selected,  when a person browses a page on one server, and then searches for a product, a different server may respond to him.  Thus any server in the cluster will respond to the client.

Step 8
Once you have added the ports the next screen will look like this.  Click next to continue

Step 9

This step we need to add the server we are doing the work on as a member of the cluster.  Add the IP of the server in the host field.  If the server has multiple Network cards add the IP on the network adapter with NLB installed on it.

Step 10
Accept the defaults and click finish

And we are done.  We have susscefully added one client to the Network load balancing service, but one client is useless we need at least two for this to work. To add a client we simply go back to the manager and connect to the cluster.  Once connected to the cluster go to cluster and add host.

I hope this helped you setup you NLB cluster.  Please leave feed back.

The Script will be at the end of the post.

To backup use the EXPORT command.  See image below off the command.

Now you are done, Keep the folder you exported all your DNS settings safe. To import jsut do the reverse, and use the command IMPORT and the folder your created.

Here is the script you need.  Call it dnsdump.bat

:: DNSdump Version 2.0 – Dean Wells, MSEtechnology – July 2003

:: PURPOSE – Dumps local server’s DNS service configuration and zone content. Once dumped, the content
::           can be imported on any other Windows 2000/2003 based DNS server [includes cross OS dumps]

:: DNSdump V2.0 is INCOMPATIBLE with the current public release

:: Supports Windows 2000/2003 members or DCs including Active Directory integrated zones. Application
:: partitions are supported

:: Requires Administrative credentials on local machine. If the DNS server is also a Domain Controller,
:: Domain Administrative credemtials are required in order to export or import Active Directory integrated
:: DNS zones

:: Active Directory integrated zones exported from the domain NC will be translated to the local domain
:: NC in the event of a cross domain export/import. Further behavioral details documented in syntax help

@echo off
setlocal ENABLEDELAYEDEXPANSION

:: Prepare the display
echo.

:: Define environment
set TOOLNAME=DNSdump
set KNOWNPATH=25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,53,79,73,74,65,6d,33,\
set INSTALLROOT=%SystemRoot%\System32\DNS
set DUMP=%~f2
set STDOUT=nul
set STDERR=nul
set WORKING=0
set ERROR=
set domainDN=
set domainDNS=
set SUPPORTEDBUILDS=2195 3790

:: Check local server meets necessary requirements for successful operation

:: Derive operating system version and validate support
for /f “tokens=3 delims=.]” %%v in (’ver’) do set BUILD=%%v
for %%s in (%SUPPORTEDBUILDS%) do (
 if not “%%s”==”%BUILD%” (
  if “!ERROR!”==”" set ERROR=1
 ) else (
  set ERROR=0
 )
)
if not “%ERROR%”==”0″ (
 call :ERROR unsupported operating system version, build “%BUILD%”
 goto :END
)

:: Check for sufficient arguments
if “%2″==”" (
 call :ERROR insufficient arguments
 call :SYNTAX
 goto :END
)

:: Correct and/or report any errors in the dump directory argument
set DUMP=%DUMP:”=%
set TDUMP=%DUMP: =%
if not “%TDUMP%”==”%DUMP%” (
 call :ERROR dump path CANNOT contain spaces, “%DUMP%”
 goto :END
)

:: Locate critical executables, error and terminate if not found
for %%e in (net.exe findstr.exe ldifde.exe regedit.exe) do (
 set where=”%%~$PATH:e”
 if “!where!”==”"”" (
  call :ERROR critical executable, “%%e”, could not be located 
  goto :END
 )
)
 
:: Determine if DNS service is installed on local machine
regedit /E:A “%TEMP%\DNS-Service.TMP” HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\DNS
if not exist “%TEMP%\DNS-Service.TMP” (
 call :ERROR DNS service does not appear to be installed on “%COMPUTERNAME%”
 goto :END
)

:: Check local credentials
net user “%username%” | findstr /i “Administrators” 1>%STDOUT% 2>%STDERR%
if errorlevel 1 (
 net user “%username%” | findstr /i /c:”Domain Admins” 1>%STDOUT% 2>%STDERR%
 if errorlevel 1 (
  call :ERROR security context is insufficient, administrative credentials required
  goto :END
 )
)

:: Determine if local machine is member or Domain Controller
regedit /E:A “%TEMP%\DCorMember.TMP” “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ProductOptions”
if not exist “%TEMP%\DCorMember.TMP” (
 call :ERROR unable to determine machine configuration [DC or member]
 goto :END
)
for /f “tokens=2 delims==” %%t in (’type “%TEMP%\DCorMember.TMP” ^| findstr “ProductType”‘) do (
 if /i “%%t”==”"LanmanNT”" (set TYPE=DC) else (set TYPE=MEMBER)
)

:: Get DNS domain name of local machine
if “%TYPE%”==”DC” (
 regedit /E:A “%TEMP%\NTDS-Service.TMP” HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Netlogon\Parameters
 if not exist “%TEMP%\NTDS-Service.TMP” (
  call :ERROR Directory Service configuration could not be determined
  goto :END
 )
 for /f “tokens=1* delims==” %%s in (’type “%TEMP%\NTDS-Service.TMP” ^| findstr “sysvol”‘) do (
  set SYSVOL=%%t
  set SYSVOL=!SYSVOL:\\=\!
  for /f “tokens=2 delims=>” %%d in (’dir !SYSVOL! /ad ^| findstr “JUNCTION”‘) do (
   set domainDNS=%%d
   set domainDNS=!domainDNS: =!
  )
 )
 if “!domainDNS!”==”" (
  call :ERROR Directory Service configuration could not be determined
  goto :END
 )
 call ERIVEDN “!domainDNS!”
 set domainDN=!partDN!
)

:: Begin script body

:: Determine mode of operation
if /i “%1″==”IMPORT” (
 set MODE=IMPORT
)  else (
 if /i “%1″==”EXPORT” (
  set MODE=EXPORT
 ) else (
  call :ERROR invalid mode specified, “%1″
  call :SYNTAX
  goto :END
 )
)

:: React to derived mode and create/verify dump directory structure
if “%MODE%”==”EXPORT” (
 if exist “%DUMP%” (
  call :ERROR dump directory already exists, “%DUMP%”
  goto :END
 ) else (
  md “%DUMP%” 2>%STDERR%
  if errorlevel 1 (
   call :ERROR unable to create dump directory, “%DUMP%”
   goto :END
  )
  md “%DUMP%\InstallRoot” 2>%STDERR%
  if errorlevel 1 (
   call :ERROR unable to create directory, “%DUMP%\InstallRoot”
   goto :END
  )
  md “%DUMP%\Logs” 2>%STDERR%
  if errorlevel 1 (
   call :ERROR unable to create log directory, “%DUMP%\Logs”
   goto :END
  )
 )
) else (
 if not exist “%DUMP%” (
  call :ERROR specified dump directory NOT found, “%DUMP%”
  goto :END
 )
)

:: Define custom DNS service installation root if supplied
if not “%3″==”" (
 set INSTALLROOT=%~f3
 if not exist “%INSTALLROOT%” (
  call :ERROR DNS installation root, “%INSTALLROOT%”, is invalid
  goto :END
 )
) else (

:: Query DNS service registry key for install root … if non-standard, error
 for /f “delims=: tokens=2″ %%i in (’type “%TEMP%\DNS-Service.TMP” ^| findstr /i “ImagePath”‘) do set ACTUALPATH=%%i
 if not “%KNOWNPATH%”==”!ACTUALPATH!” (
  call :ERROR non-standard DNS installation root, specify zone file path
  set ERROR=2
  goto :END
 )
 if not exist %INSTALLROOT% (
  md %INSTALLROOT%
  if errorlevel 1 (
   call :ERROR unable to create DNS installation root, “%INSTALLROOT%”
   goto :END
  )
 )
)

:: Export only the non locally critical DNS service registry keys to dump directory
if “%MODE%”==”EXPORT” (
 regedit /E:A “%DUMP%\DNS-Service-LegacyZones.REG” HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\DNS\Zones
 regedit /E:A “%TEMP%\DNS-Service-Parameters.TMP” HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\DNS\Parameters
 if not exist “%TEMP%\DNS-Service-Parameters.TMP” (
  call :ERROR unable to retrieve DNS service configuration
  set ERROR=2
  goto :END
 )
 type “%TEMP%\DNS-Service-Parameters.TMP” | findstr /v /i “PreviousLocalHostname” >”%DUMP%\DNS-Service-Parameters.REG”
 if not exist “%DUMP%\DNS-Service-Parameters.REG” (
  call :ERROR unable to retrieve DNS service configuration
  set ERROR=2
  goto :END
 )
)

:: Set working directory and indicate state
pushd “%DUMP%” 1>%STDOUT% 2>%STDERR%
echo %TOOLNAME% – Ready to proceed, configuration as follows -
echo.
echo    * Security context is “%USERDOMAIN%\%USERNAME%”
echo    * Mode of operation is “%MODE%”

if “%TYPE%”==”DC” (
 echo    * Domain Controller detected
 echo    * Active Directory domain name is “%domainDNS%”
 set /p nul=   * Active Directory integrated zones WILL be %MODE%ED <nul
 if “%BUILD%” GTR “2195″ (
  echo – NDNC’s supported
 ) else (
  echo – NDNC’s NOT supported
 ) 
) else (
 echo    * Non Domain Controller detected
 echo    * Active Directory integrated zones UNAVAILABLE
)

echo    * DNS installation root is “%INSTALLROOT%”
echo    * %TOOLNAME% directory is “%DUMP%”
echo.
echo STATUS – Task progress …
echo.

:: Set WORKING to TRUE and jump to mode
set WORKING=1
goto :%MODE%

:: Should never get here – FATAL ERROR
call :ERROR a fatal unknown error occurred
set ERROR=2
goto :END

:: Define procedures

:IMPORT

:: Check the import directory for valid dump configuration
if not exist “%DUMP%\DNS-Service-Parameters.REG” (
 call :ERROR unable to retrieve DNS service configuration
 goto :END
)
if not exist “%DUMP%\DNS-Software.REG” (
 echo    – legacy “Zones” configuration detected … LEGACY USED
)

:: Stop the DNS service
echo    – stopping DNS service
net stop dns 2>&1 | findstr /i /c:”not exist” 1>%STDOUT% 2>%STDERR%
if not errorlevel 1 (
 call :ERROR unable to stop DNS service
)

:: Create .REG file to remove existing registry based DNS service configuration
echo    – removing existing DNS service configuration
echo REGEDIT4>%TEMP%\KillKeys.REG
echo.>>%TEMP%\KillKeys.REG
echo [-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters]>>%TEMP%\KillKeys.REG
echo [-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Zones]>>%TEMP%\KillKeys.REG

:: Execute the removal
if exist %TEMP%\KillKeys.REG (
 regedit /s %TEMP%\KillKeys.REG
) else (
 call :ERROR existing configuration could NOT be removed
)

:: Delete the temporary registry file
del %TEMP%\KillKeys.REG 1>%STDOUT% 2>%STDERR%

:: Import the registry data
echo    – reconfiguring DNS service
for %%r in (”%DUMP%\DNS-Service-Parameters.REG” “%DUMP%\DNS-Software.REG” “%DUMP%\DNS-Service-LegacyZones.REG”) do (
 if exist %%r (
  regedit /s %%r
 ) else (
  if not “%%r”==”"%DUMP%\DNS-Service-LegacyZones.REG”" (
   call :ERROR unable to reconfigure DNS service registry settings
  )
 )
)

:: Restore the DNS config./zone files
echo    – restoring DNS service configuration files to “%INSTALLROOT%”
xcopy “%DUMP%\InstallRoot\*.*” “%INSTALLROOT%” /h /y 1>%STDOUT% 2>%STDERR%
if errorlevel 1 (
 call :ERROR unable to export configuration files to “%INSTALLROOT%”
 goto :END
)

:: Restore the Active Directory integrated zones
:: Check the type (DC or member), if member skip, if DC import all files with extension .ADzones
if “%TYPE%”==”DC” if exist “%DUMP%\*.ADzones” (
 echo    – importing Active Directory integrated DNS zones from;
 echo.
 for /f %%z in (’dir /b “%DUMP%\*.ADzones”‘) do (
  set tmpPART=%%~nz
  if /i “!tmpPART:~0,9!”==”CN=System” (
   call :NCIMPORT !tmpPART!
  ) else (
   if not “%BUILD%” GTR “2195″ (
    echo       * !tmpPART!
    echo          – unsupported partition detected … IGNORED
    set ERROR=1
   ) else (
    call :NCIMPORT !tmpPART!
   )
  )
 echo.
 )
)

:: Start the DNS service
echo    – restarting DNS service
net start dns 2>&1 | findstr “invalid” 1>%STDOUT% 2>%STDERR%
if not errorlevel 1 (
 call :ERROR unable to start DNS service
)

:: Determine level of success
echo.
if “%ERROR%”==”1″ (
 echo STATUS – Import partially completed … ERRORS OCCURRED
) else (
 echo STATUS – DNS service configuration completed
)

goto :END

:: Handles export of DNS configuration and zone content
:EXPORT

echo    – exporting DNS service configuration

if not exist “%DUMP%\DNS-Service-Parameters.REG” (
 call :ERROR unable to retrieve DNS service configuration
 goto :END
)

:: Construct partition information
echo “%domainDNS%”>”%DUMP%\PartitionFQDN.DAT”

regedit /E:A “%DUMP%\DNS-Software.REG” “HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DNS Server”

:: Alert user to legacy storage of zone configuration
:: Else clause derives partitions in which zones exist and assumes domain NC as potential candidate
if not exist “%DUMP%\DNS-Software.REG” (
 echo    – legacy “Zones” key located … LEGACY CONFIGURATION USED
) else (
 for /f “tokens=2 delims==” %%z in (’type “%DUMP%\DNS-Software.REG” ^| findstr “DirectoryPartition”‘) do (
  echo %%z>>”%DUMP%\PartitionFQDN.DAT”
 )
)

:: Copy existing DNS install root
echo    – exporting DNS service file structure from “%INSTALLROOT%”
copy “%INSTALLROOT%\*.*” “%DUMP%\InstallRoot” /y 1>%STDOUT% 2>%STDERR%
if errorlevel 1 (
 call :ERROR unable to backup DNS installation root, “%INSTALLROOT%”
 set ERROR=2
 goto :END
)

:: Exports Active Directory integrated zones if running on a DC
:: Removes objectGUID references in order to permit import
if “%TYPE%”==”DC” (
 echo    – exporting Active Directory integrated Zones from;
 echo.
 if not exist “%DUMP%\PartitionFQDN.DAT” (
  call :ERROR unable to derive partitions containing DNS zones
 )
 for /f “tokens=*” %%d in (’type “%DUMP%\PartitionFQDN.DAT”‘) do (
  call ERIVEDN %%d
  ldifde -s localhost -d “CN=MicrosoftDNS,!partDN!” -f “%DUMP%\!partDN!.ADtmpZones” -j “%DUMP%\Logs” | findstr /i /c:”No Entries found” 1>%STDOUT% 2>%STDERR%
  if not errorlevel 1 (
   set ERROR=1
   echo       * !partDN! – UNHANDLED ERRORS
  ) else (
   echo       * !partDN!
  )
  echo          – preparing zones for import
  echo.
  type “%DUMP%\!partDN!.ADtmpZones” | findstr /v “objectGUID” >”%DUMP%\!partDN!.ADzones”
  del “%DUMP%\!partDN!.ADtmpZones” 2>%STDERR%
  call :LOGS %!partDN!
 )
)

:: Determine level of success
echo.
if not “%ERROR%”==”0″ (
 echo STATUS – Export partially completed … ERRORS OCCURRED
) else (
 echo STATUS – Export completed successfully
)
goto :END

:: End script body

:: Define procedures and error/syntax routines

:: Receives a fully qualified domain name as argument 1 and converts it to a distinguished name
ERIVEDN
set partDN=%*
set partDN=%partDN:~1,-1%
set partDN=.%partDN%
set partDN=%partDN:.=,DC=%
set partDN=%partDN:~1%
if /i “%domainDN%”==”%partDN%” (
 set partDN=CN=System,%partDN%
)
goto :EOF

:: Import supplied naming context and handle logged output
:NCIMPORT

:: Translate DN references for domain NC integrated zones such that a zone exported from a DC in one domain
:: can be imported into the domain NC of a DC in another
if /i “%tmpPART:~0,9%”==”CN=System” (
 if not “%tmpPART:~10%”==”%domainDN%” (
  set APPEND=-c %tmpPART:~10% %domainDN%
  set logDN=CN=System,%domainDN%
 ) else (
  set APPEND=
  set logDN=%*
 )
) else (
 set APPEND=
 set logDN=%*
)

ldifde -s localhost -i -k -f “%*.ADzones” -j “%DUMP%\Logs” %APPEND% | findstr /i “error” 1>%STDOUT% 2>%STDERR%
if not errorlevel 1 (
 echo       * %* … UNHANDLED ERRORS
 set ERROR=1
) else (
 echo       * %*
)

if not “%APPEND%”==”" (
 echo          – cross domain EXPORT/IMPORT detected, domain DN’s translated
 echo            … “%tmpPART:~10%” to “%domainDN%”
)

call :LOGS %logDN%
goto :EOF

:: Rename logged entries for each partition exported or imported in order preserve each log
:LOGS
del “%DUMP%\Logs\*-%MODE%.LOG” 1>%STDOUT% 2>%STDERR%
del “%DUMP%\Logs\*-%MODE%.ERR” 1>%STDOUT% 2>%STDERR%
ren “%DUMP%\Logs\ldif.log” “[%*]-%MODE%.LOG” 1>%STDOUT% 2>%STDERR%
ren “%DUMP%\Logs\ldif.err” “[%*]-%MODE%.ERR” 1>%STDOUT% 2>%STDERR%
goto :EOF

:: Displays errors
:ERROR
if “%WORKING%”==”1″ (
 echo    – FAILED … %*
) else (
 echo ERROR – %*
)
set ERROR=1
goto :EOF

:: Provides assistance with syntax
:SYNTAX
echo.
echo SYNTAX – %TOOLNAME% [IMPORT^|EXPORT] [dump directory] ^<optional install root^>
echo.
echo   * [IMPORT] imports a %TOOLNAME% exported DNS service configuration
echo   * [EXPORT] exports the existing DNS service configuration
echo   * [dump directory] is a local, writable directory path
echo   * [install root] is the local absolute path used by the DNS service
echo.
echo   * %TOOLNAME% requires -
echo     – administrative credentials
echo     – local execution on the DNS server
echo     – Microsoft Windows 2000/2003 server family, builds %SUPPORTEDBUILDS%
echo.
echo   * %TOOLNAME% provides import and export of -
echo     – DNS service configuration
echo     – Active Directory integrated zones and zone configuration
echo     – standard zone files and zone configuration
echo.
echo   * %TOOLNAME% feature notes -
echo     – existing Active Directory zones will NOT be overwritten during IMPORT
echo     – manually erase existing zones IF an authoritative import IS REQUIRED
echo     – ALL zone configuration options WILL be overwritten during IMPORT
echo     – non Active Directory integrated zones WILL be overwritten during IMPORT
echo     – existing DNS service configuration WILL be overwritten during IMPORT
echo     – DNS service WILL be restarted during IMPORT
echo     – detailed logs are preserved beneath the specified DUMP path
goto :EOF

:END

:: Restore previous working directory
popd

:: Clean up
del “%TEMP%\DNS-Service.TMP” 1>%STDOUT% 2>%STDERR%
del “%TEMP%\DNS-Service-Parameters.TMP” 1>%STDOUT% 2>%STDERR%
del “%TEMP%\NTDS-Service.TMP” 1>%STDOUT% 2>%STDERR%
del “%TEMP%\DCorMember.TMP” 1>%STDOUT% 2>%STDERR%

if “%ERROR%”==”2″ (
 if “%MODE%”==”EXPORT” (
  del “%DUMP%\InstallRoot” /f /y 1>%STDOUT% 2>%STDERR%
  rd “%DUMP%\InstallRoot” 1>%STDOUT% 2>%STDERR%
  del “%DUMP%\Logs” /f /y 1>%STDOUT% 2>%STDERR%
  rd “%DUMP%\Logs” 1>%STDOUT% 2>%STDERR%  
  del “%DUMP%” /f /q 1>%STDOUT% 2>%STDERR%
  rd “%DUMP%” 1>%STDOUT% 2>%STDERR%
 )
)

http://support.microsoft.com/kb/290301