Cisco Router and WAN ADSL connection with RFC1483 Routing support

If you need to connect to an ADSL with a WAN static ip public address but without the other IP address of the WAN point to point connection this tutorial could be useful. I set up it with an old Telecom Italia Smart 16 connection with 16 IP public address to configure on the LAN interface on my router (a Cisco 2800).

Data from the ISP:

- WAN IP Public Address (usually with subnet mask, it is not in fact a standard point to point connection with subnet mask)

- A range of IP Public Address to configure on the LAN interface (ip public address + subnetmask)

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