Currently using GlassWire Elite, so voted 3rd party. I love that software, but in all honesty it's more of a network monitor with advanced features than a firewall per se, as it doesn't even reinforced the Windows Firewall such as Emsisoft or Trend Micro does. Still, if you are satisfied with the level of security the default Windows Firewall provides, this soft is worth a look. The latest 2.0 update even includes the ability to check any process with VirusTotal. The free version is enough and there are sales regularly on StackSocial.