I have a Windows 2003 SBS installed on a server with DC role. No internet conection, I ping the gateway and not respond, which I ping any client computer on the network and unresponsive. But if I can ping the server from a client. I've checked the settings and I have no TCP/IP to look. if I change the IP to the network card lets me browse for one second and then falls again. The firewall is disabled, the antivurs also, I searched some software I would be cutting the connection but more I look I see nothing. No is happening, any ideas?