Change my IP address using a Cable modem

WELCOME to virtualdr.

The router changes your public IP to a private IP number.
Now the public IP can only be changed by your internet provider.

To see your public IP use this link http://www.whatismyip.com/

Now to see your computers ip, go to Start, Run [type in] cmd and hit enter
In the box that opens, type in, ipconfig /all
then hit enter

What you will get looks like this. I just changed some of the vaues but not the general outline.

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\xxxxx>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : amdjr
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : xxxx.xx.comcast.net.

Ethernet adapter Local Area Connection 3:

Connection-specific DNS Suffix . : xxxx.xx.comcast.net.
Description . . . . . . . . . . . : Realtek RTL8169/8110 Family Gigabit
Ethernet NIC #2
Physical Address. . . . . . . . . : 00-xx-F4-xx-xx-71
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.xx.xxx
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.xxx.xxx
DHCP Server . . . . . . . . . . . : 192.168.xxx.xxx
DNS Servers . . . . . . . . . . . : 204.127.199.8
63.240.76.198
Lease Obtained. . . . . . . . . . : Thursday, November 24, 2005 6:45:05
AM
Lease Expires . . . . . . . . . . : Wednesday, November 30, 2005 6:45:05
AM

C:\Documents and Settings\XXXX>

I hope tis helps you.