Question about IP address

I'm behind a router that provides NAT, so all my internal addresses are
192.168.x.x. When I look at the WAN address assigned to my router (in the
router's config utility) it shows what looks like the dynamically assigned
public IP address from my ISP (24.x.x.x). However, if I bypass my router
and connect my computer directly to my cable modem, my computer's IP address
is NOT the same number as that listed in the router config. It's a
completely different number, such as 66.x.x.x.

What's going on there?

jm

On Fri, 18 Nov 2005 23:05:26 GMT, "JM" <(E-Mail Removed)> wrote:

>I'm behind a router that provides NAT, so all my internal addresses are
>192.168.x.x. When I look at the WAN address assigned to my router (in the
>router's config utility) it shows what looks like the dynamically assigned
>public IP address from my ISP (24.x.x.x). However, if I bypass my router
>and connect my computer directly to my cable modem, my computer's IP address
>is NOT the same number as that listed in the router config. It's a
>completely different number, such as 66.x.x.x.
>
>What's going on there?

When you connect to your ISP (Comcast?) the ISP's router assigns a
dynamic IP address to the MAC address of your router. When you
connect directly with your computah, it has a different MAC address.
Therefore, the ISP will assign a different IP address to your
computers MAC address.

You can see the effect if you go to the "clone MAC address" page on
the router. If you change the MAC address of the routers WAN port, it
will get a new IP address from the ISP.