It leaves Posh two points behind Derby County following their win over Burton Albion.
The match was watched by a crowd of 12,785, with David Lowndes on hand to take these pictures of some of the Posh fans there.
Check out this gallery and see who you know.
Full reaction, and more Posh news, here.
21. Posh 0 Ipswich 3
Peterborough United fans during the defeat to Ipswich Town. Photo: David Lowndes
22. Posh 0 Ipswich 3
Peterborough United fans during the defeat to Ipswich Town. Photo: David Lowndes
23. Posh 0 Ipswich 3
Peterborough United fans during the defeat to Ipswich Town. Photo: David Lowndes
24. Posh 0 Ipswich 3
Peterborough United fans during the defeat to Ipswich Town. Photo: David Lowndes
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