Dublin Ferryport is situated in the docks downstream from the city centre where the River Liffey meets the sea. It is best to get to and from the port by bus or taxi - the surrounding area is not one to safely wander around, especially at night. The ferry terminal is a very modern building, with a variety of facilities, but is closed overnight. There is NO regular bus service to and from the fery terminal - the nearest regular bus route is more than a mile and a half away.
Special buses meet most arrivals.
At other times it is best to get a taxi, of which there are many available at the terminal. Beware - Dublin taxi fares are very expensive compared to other cities. There are no bus services to the port at other times. Sailings and bus services are at different times around the year, so check with your ferry company for details. . Dun Laoghaire is the best served by public transport of any of the ferryports, situated as it is right in the centre of Dun Laoghaire town, a major shopping and tourist centre.