The Robins dominated the match for extended periods and could, quite easily, have emerged with all three points.
Elvis Hammond put them ahead just shy of the hour mark before Jonny Godsmark's equaliser.
Allen said: "I thought our team was absolutely superb - it was our best performance we've had this season.
"It showed the character of the players having played three games in the week.
"Hereford also cleared three off the line in the last minute and only had one shot in the second half and that was on the break but the rest of the time our back four were superb. Everyone in the dressing room is disappointed and are upset we didn't score more goals and go on and win the game."