SocketException(0x80004005) Tried to get access to a socket on a way which is not allowed by security

Question

I am trying to join my friends server in Terraria, and when I try to join my friends server with Hamachi, it says:

System.Net.Sockets.SocketException(0x80004005): Tried to get acces to a socket on a way which is not allowed by security. 
at System.Net.Sockets.Socket.DoConnect(EndPoint.endPointSnapshot, SocketAddres, socketAddres)
at System.Net.Sockets.Socket.Connect(EndPoint, remoteEP)
at System.Net.Sockets.TcpClient.Connect(IPEndPoint remoteEP)
at System.Net.Sockets.TcpClient.Connecy(IPAdress adress, Int32 port)
at Terraria.Netplay.ClientLoop(Object threadContext)

Does anybody know what's causing it, and how to help it? Me and my friend both turned our firewalls off, and it didnt work.

Answer 1

If your firewall truly is not on... It seems like a Code Access Security problem to me. That's a set of permissions set up in windows that can control what resources each application can access. There's a commandline util for configuring it called "caspol.exe". I'd suggest making sure your app has network I/O permissions (or All if you are lazy)