Jon Nolan had only scored one previous goal for Ipswich in a 2-2 draw at Birmingham in September
Derby County missed the chance to climb back into the Championship play-off places as substitute Jon Nolan's equaliser clinched a point for struggling Ipswich Town.
Tom Lawrence fired Frank Lampard's Derby ahead in just the second minute to leave Paul Lambert's Ipswich fearing a fifth successive league defeat.
But Nolan's second Ipswich goal drew the hosts level 10 minutes into the second half before Duane Holmes' goal-line clearance denied them the lead.
Derby have lost just once in their past seven league games while, despite their fightback, Ipswich have taken just five points from their past 10 league games and remain bottom of the table.
Lawrence opened the scoring when his volley took a deflection off Ipswich defender Jonas Knudsen and beat goalkeeper Bartosz Bialkowski after Jayden Bogle had headed the ball across the penalty area.
Nolan equalised 10 minutes into the second half - just two minutes after replacing the injured Flynn Downes - when he found the bottom corner from a neat pass by Collin Quaner.
With 20 minutes remaining Knudsen connected well with a right-footed volley from a corner but Holmes saved Derby by clearing off the line.
Derby should have won in the final minutes but Fikayo Tomori headed against the post before substitute David Nugent struck the crossbar.
It meant Lambert was denied victory but was spared a third successive defeat against the Rams, having lost his previous two games against them with Blackburn and Wolves.
Ipswich ended a run of four successive home defeats in the league against Derby, who have not managed a league double over the Suffolk side since 1986-87.
Ipswich manager Paul Lambert told BBC Radio Suffolk:
"Apart from about 60 seconds of the game, I was delighted with us.
"We started not bad for those couple of minutes, then we lost a goal, but after that it was relentless.
"On Sunday (against Norwich) we lost the game but we never capitulated and we were the better team football-wise.
"I was proud of the team on Sunday even though we lost, everybody hurt and the training ground was down, as you would expect, but we came back really strongly and after the disappointment of Sunday we were excellent."
Derby manager Frank Lampard told BBC Radio Derby:
"It's not a loss, but from going 1-0 up against a team struggling at the bottom of the table, we allowed them back into the game by not being at our best.
"We got a good start, on the front foot, getting bodies in the box and we got our goal and that's one of the most frustrating part of the night, and you would have fancied us then to take some control and go on and win it and we didn't.
"If you give the ball away you lose control of a game, it's as simple as that. To give simple passes away and offer confidence and counter-attacks to a team that are struggling is the cardinal sin.
"You go 1-0 up and you want to take the game away and make them feel like they're bottom of the table. You give them a glimmer of life and they're going to fight to the end."
