How to configure PAT to pull an IP address from cable modem on a Cisco 800 series router?
I have a Cisco 800 series router, but I don’t think I can get a static IP address from my ISP. I need to configure port address translation but I’d hate to have redo it every time my cable modem gets a different IP.
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You need to setup your cable modem to route rather than bridge. That way you can have a set IP on the inside interface.That is if your modem supports that.
Then you could just overload the IP on the subnet of the inside interface of the modem.