I'm under a firewall. Heavy and aggressive. Not under my control.
I tried using a few servers using Windows' L2TP/IPsec method. All of them result in the error 789.
All was done following the tutorials from this page. Tried typing the IP OR the server string. No difference.
I cannot install alternative programs.
How can I fix this ?
Extra: Proxys from browsers like Chrome or Firefox DON'T work either