On occasion the ISP will send a modem/router (combo). This type of equipment does not require a separate modem for the connection. It is unusual to get one of this equipment unless you are running a business. It may also depend on your account such as a package of static IP's etc.
Figure 2.39 basically represents combo equipment. This Router is configured exactly the same way as we already did for our last two connections.
WAN IP: Static Address Configuration
This settings is much easier to configure manually, all you have to do is get to the Static configuration page. The ISP should have sent you all the information required for the setup, in this case your IP Addresses. See the following table.
Table 2.2 This table shows a typical configuration sent by your ISP, an account with 5 static IP addresses
|Your Router Side||Your Network Side|
|Router IP||168.3426.56||1st IP||22.214.171.124|
|Subnet mask||255.255.255.248||3rd IP||126.96.36.199|
|ISP's DNS||188.8.131.52||4th IP||184.108.40.206|
|ISP's DNS||220.127.116.11||5th IP||18.104.22.168|
| || ||Subnet mask||255.255.255.248|
Figure 2.40 shows all entered IP addresses required for the connection (router side).
- Enter the router's IP address here.
- Enter the subnet mask
- Enter the Gateway
- Enter the DNS
This router now has all the necessary information to connect to the Internet. According to Table 2.2, you have 5 static IP's. The range of the IP address from table 2.2 then would go into the Local Area Network (LAN) IP Setup, see fig 2.38. When you enter the range of your public IP's in the LAN IP section, then you no longer can assign 254 hosts, but the 5 IP's controlled by the subnet mask 255.255.255.248.
At this point your router has 5 public static IP's, which means that if you configure 5 computers with this IP addresses each computer could be a server over the internet.
You could also add an additional router to any of these IP addresses with a hub or switch to serve an internal local area network, or use any computer connected to any of these IP addresses and convert it into a Proxy server to assign an internal subnet which will provide Internet access to all the clients in the Local area network.