Add freelancer to all exception list possible.
From anti virus, antivirus Fire wall, windows defender, windows firewall etc.
It can also be your router it's firewall
See, but here's the thing. I've got the windows default firewall, and an antivirus that only does antivirus. There's only one firewall here: The router is a school network, and has every port open. Or every port I've ever encountered before, anyway.