The 1.4.1 and later releases of the
      Network Security Toolkit should work very well within a VMware virtual
      machine. These newer releases of the Network Security Toolkit will include the
      nstvmware script and the VMware modules/tools
      to maximize the performance of the Network Security Toolkit when running from
      within a Virtual machine.
We have verified that the 1.4.0 and
      1.2.3 releases of the Network Security Toolkit will also work
      within the VMware Player. However, these older releases do not
      include the nstvmware helper script, the
      VMware modules, or the VMware tools.