I dont have one, I am using qa wifi antenna to connect to a network, and I wanted to forward this connection to a smartphone and tablet that I have in my apartment, so I bought this mini USB Wifi A.P. adapter to do that, and it only works when the firewall is disabled, in the meantime I found out about Connectify so I used the antenna that receives the wifi to also emmit the received signal, but it also only works when the firewall is disabled, I don't know how safe it would be to leave it without the firewall, and I really need to forward the connection...