FR 4500 then FR 7072 at Dublin
Cologne → Dublin → Porto
Timetable, Dublin time
00:15FR 4500 from Cologne at the gate
17:45FR 7072 to Porto leaves the gate
17 h 30 apart on the timetable
FR 7072 leaves 17 h 30 after FR 4500 arrives on the timetable: more than half a day, so not a connection we count.