General broadband Internet access is to have a fixed IP address, and then there is an authentication software, a single machine to access is the first through the authentication in order to access the Internet. If two or more computers at the same time using a access, and is your situation, you need a router with MAC address cloning function. (MAC address cloning function of the router is now almost all support)
The debugging steps are such as the Mercury MR804 model as an example (in fact, the router is almost all so set up, the difference is only some of the subtle differences in the specific operation):
1, first of all, the external cable into the router's WAN port (with authentication of the machine A) connected to the LAN port. (Other machines first disconnected)
2, (machine A) IP address automatically obtained, or specified as IP: 192.168.1.3 subnet mask: 255.255.255.0
Gateway: 192.168.1.1 Preferred DNS: 192.168.1.1 Alternative not fill
3, IE address bar enter 192.168.1.1 Enter: Username: admin Password: admin Enter the router interface. (See your router for the account/password to enter the router)
(192.168.1.1 in 2 and 3 is actually the router's address, and some routers are 192.168.0.1)
4. Click on the Setup Wizard, select Static IP Next, enter the IP Subnet Mask Gateway DNS, and then Next to complete the process.
5, click on the network parameters MAC address cloning copy
6, close the IE window , click on the radio and television authentication software, authentication is complete, the machine can be online.