title: Windows XP firewall blocks open connection made using C# socket
body: <p>I make a client-server connection using C# sockets and while the connection is established in the client side I activate the firewall using the firewall api, after that, for some reason the client application becomes unable to send any data to the server and the two parts still connected. Is like the activation of the firewall blocks the connection. Why is this happening?
  If more information is needed please just ask.</p>