Struggling Kettering thwarted Southport's Blue Square Bet Premier play-off bid in a match which saw both sides finish with 10 men.
In-form Kettering keeper Laurie Walker kept his side in the game with a series of fingertip saves, before Ben Ford hit the post for the visitors.
Josh O'Keefe was sent off for a challenge on Ford and Sol Davis was then was sent off for violent conduct.
Phil Ifil went narrowly wide late on for the Poppies.
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Southport manager Liam Watson told BBC Radio Merseyside:
"The first half is as bad as we've played all season and we were lacklustre.
"I thought both of our forwards were woeful, they never held it up, didn't play as a front two and the ball was coming back at us.
"In the end we were lucky we didn't end up losing it.
"We have had numerous chances in the second half and we haven't taken them but we've got to give Kettering credit."
Kettering Town caretaker manager Ashley Westwood told BBC Radio Northampton:
"I thought the team's passion, desire and grittiness was there and we've come away with a point.
"With a bit more luck it might have been three. We stood up to them well.
"Laurie Walker has performed really, really well. He's proving his worth as a Conference - if not League - goalkeeper.
"A point away from home to a play-off team is not to be sniffed at and it shows we've got determination to keep going. No-one's lying down."