How to access a ethernet device behind a ADSL modem?

"Ricardo Raupp" <[email protected]> Sat, 25 Oct 2008 13:33:53 -0200

Newsgroups	gmane.comp.hardware.motorola.microcontrollers.coldfire
Message-ID	<001e01c936b7$167a03e0$c705050a@ricardo>

Hi Folks
I developped a board with ethernet and some relays to home automation.
Till now, I know that the only way to connect with this board is:
- know the modem IP
- set a Port Forwarding (NAT?) feature in the modem web browser.
Well, ok...
But, imagine the modem has been replaced by a new one....the NAT settings 
disappeared !!therefore the board is now unreachable!
I read about a  protocol (?) / feature(?) called uPnP : Universal Plug and 
Play and I understood the
own device connected to a switch could ask for Port Fowarfing.
It is a very important feature for people who wants to connect devices wich 
are behind switchers / modensa etc..

Has anyone done it?

Will it be what MSN and others do to be able to receive external 
connections?

Ricardo Raupp


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