Padraig Amond's Newport will contest the League Two play-off final after beating Mansfield on penalties.
The sides played out a 0-0 draw on Sunday after a 1-1 draw in the first leg and County prevailed 5-3 in the shoot-out.
Carlow man and recent Republic of Ireland provisional call-up Amond converted a spot-kick in the shootout as Tyler Walker missed for Mansfield, leaving Matt Dolan to do the honours for the visitors.
Dublin's Mark O'Brien was also on the winning while Donegal goalkeeper Conrad Logan and former Ireland U21 defender Ryan Sweeney were in the Mansfield XI.
Newport will face Tranmere or Forest Green in the final.