Lee Novak proved the difference as Huddersfield made it to the FA Cup fourth round for only the second time in 11 years with a 2-0 win over Dover.
Novak raced to the bye-line on seven minutes and pulled the ball across the face of goal for Scott Arfield to tap in the opener, before latching on to a long ball down the right flank virtually straight from the restart and crossing for Gary Roberts to blast in at the far post.
Town, who started well, seemed to sit back after that and nearly let the Blue Square South side back into it.
Town skipper Peter Clarke blocked a goal-bound header from Olly Schulz on 24 minutes, and from the resulting corner Roberts had to clear off the line another Schulz header.
The Whites, backed by an impressive 1,535 travelling fans, also went close when Town keeper Alex Smithies made a mess of dealing with a long ball.
He raced off his line just before the break, but slipped, and only just recovered before 29-goal top scorer Adam Birchall pounced to tap in.
Town had chances to extend their lead after the break. Roberts and Kevin Kilbane both had shots parried by keeper Ross Flitney.
Dover rallied late on, with Birchall forcing Smithies into a good save. Smithies also did well when a shot from Harry Baker hit Huddersfield's Antony Kay and seemed destined for the net.