I developped a board with ethernet and some relays to home automation.
Till now, I know that the only one way to connect with this board is:
- know the modem IP
- set a Port Forwarding (NAT?) feature in the modem web browser.
But, imagine the modem has been replaced by a new one....the NAT settings disappeared !!therefore the board is now unreachable!
I read 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?