Batch file to open a specific TCP port in Windows 7 / 2008 Server and up

Thanks to the answer by Kevin Richardson on How to open ports on Windows firewall through batch file, I wrote this batch file that uses the add command of the Netsh AdvFirewall Firewall Commands which requires Admin privileges to run:

:: open port (first argument passed to batch script, second argument is description)

:checkPrivileges
  net file 1>nul 2>nul
  if '%errorlevel%' == '0' ( goto :gotPrivileges ) else ( goto :getPrivileges )

:isNotAdmin
:getPrivileges
  echo You need to be admin running with an elevated security token to run %0
  goto :exit

:isAdmin
:gotPrivileges
  netsh advfirewall firewall add rule name="Open Port %1 for %2" dir=in action=allow protocol=TCP localport=%1

:exit
  ::pause
  exit /b