Abstract: You wish to configure your Raspberry Pi (Wheezy or Jessie) so that it automatically connects to different wireless networks.
Abstract: This short howto explains, how a basic nagios installation could be installed, which can be used to trigger remote Powershell commands for monitoring purpose.
If you wish to implement a own DNS blacklist (e.g. because you wish to import one from the lists you found), then this could be build for some users (not a big company) based on an Raspberry PI. Setting them up required only 15 minutes.