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I Change My IP Address Quickly and Easily With a VPN. Here’s How to Get a New IP Address With and Without a VPN

Your public IP address is sort of like a street address; it's a unique string of numbers assigned by your internet service ...
Ars Technica

How can I setup my home router for multiple external ip addresses?

I'm currently using a WRT54G router with Tomato firmware and I have a simple residential dynamic ip address cable modem. The cable modem is in "bridged" mode and the router is set to use DHCP to get ...