I'm not sure what you mean by "real" ip, so I will go into more detail on how to set this up. Each broadband router should actually have 2 IP addresses. One of those IP addresses would be the external or WAN (Wide Area Network) IP. This IP is the one that is broadcast to the "world" side. The other IP is the LAN (Local Area Network) IP. This is the IP address that is broadcast to the local computers connected to the router. For example, the 3 computers that you have in your home. It is generally a 192.168.???.??? number. It is also the gateway for all your local computers. To configure your system to do what you wanted to do, you first need to know your router's LAN ip address and your service providers DNSs. To get the LAN of the router, simply open up a command window and type "ipconfig". This will give you the list of the local computer's IP, the netmask and the router's IP address. If you put the router's IP address into a web browser such as Internet Explorer for the address, it should allow you to connect to your router. Once you are connected to your router, you can usually find a button for "Status". If you click this, you will get the list of IP addresses that you will be needing. Write down the following:
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LAN IP =
Primary DNS =
Secondary DNS =
These will be needed to set up the two computers that you want to have static IP's.
For shits and giggles, lets say that:
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LAN IP = 111.111.111.111
Primary DNS = 222.222.222.222
Secondary DNS = 333.333.333.333
Now to set your computer to have a static IP.
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1. Open your network connections on one of the computers that you wish to have a static IP address.
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2. Right click the connection and select "Properties".
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3. In the box below "This connection uses the following items:", highlight "Internet Protocol (TCP/IP) and then click the properties button below it.
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4. You should see a window for the TCP/IP properties now. They probably have
the boxes checked for "Obtain an IP address automatically". Seeing as how you want to
keep your IP address the same on 2 of your computers, put a check in the box next to
"Use the following IP address. This will now let you type IP addresses into the box. For
the first box, put in your computer's current IP address. (If you don't know it,
type "ipconfig" in a command window). The second box usually fills itself in and looks like
this 95% of the time. 255.255.255.0 The third box should be the LAN IP of the router, or
your gateway. They should be the same. Use the information that you got from your
router's status to fill in the boxes below that section for the DNS servers.
When
you are done, it should look something like this.
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IP Address [111.111.111.???]
Subnet Mask [255.255.255.0]
Default Gateway [111.111.111.111] <- Router's LAN IP
Preferred DNS server [222.222.222.222] <- from router's status
Alternate DNS server [333.333.333.333] <- from router's status
Once you are done filling in all the blanks, click OK and your computer is now set up with a static IP. Do this with the other computer that you want to have a static IP as well. The computer that you don't want to have a static IP will still get its IP asigned to it on connection to the network.
Hopefully that isn't too confusing!