Dynamic Natting or Mobile ip

[Brent Wilkinson]

I am trying to figure out a feature I saw on a dlink router. 

I am creating some routers/servers for a few hotels. There requirements say
I must have a dynamic nat router. What it does is allow anyone with any
static ip to be able to connect to the network and get internet access.

Example:

Router/server
Ip:192.168.100.1/24
Dhcp server range: 192.168.100.50-192.168.100.200

Example client
Static ip: 10.1.2.47
Subnet: 255.255.255.180
Gateway: 10.1.2.1
Dns: 1.1.1.1

What I want to do is allow the client through the network without changing
there ip info. I have heard of something called mobile ip or dynamic
natting. Is anyone familiar with what I am describing and/or has done it? If
you have do you have any web pages that give information on it.

Thanks

Brent Wilkinson