Add external resolution check for DNS.
Add external resolution check for DNS.

shaon/eutester,tbeckham/eutester,sjones4/eutester,nagyistoce/eutester,nagyistoce/eutester,sjones4/eutester,nephomaniac/eutester,tbeckham/eutester,sjones4/eutester,tbeckham/eutester,nephomaniac/eutester,shaon/eutester,nephomaniac/nephoria,shaon/eutester,nephomaniac/eutester,sjones4/eutester,nagyistoce/eutester,shaon/eutester,nagyistoce/eutester,tbeckham/eutester,nephomaniac/nephoria