I don't have any internet connection/connection keeps dropping?
Wait 2 minutes for the modem to reconnect. It will automatically go through a series of steps in which lights will be flashing. Once DSL light is steady green that means that you’re back online. If you have your eir Fibre connected directly to your home, you will see a WAN LED light on your modem.
Where can I find the modem (or wireless) security key?