I got new business class internet service from comcast but do not know how to set it up on my router and server. As a matter of fact I had internet connection from another ISP and I thought that easily I can dicounct the previous ISP cable out and insert the comcast cable instead but when I do so I do not have internet in my network. I have all ip, gateway, DNS, ... from comcast. Can anybody help me to set it up on my router/server please? Sorry I am very new to networking so please be very clear and simple while helping.