As of the new patch Infrared missiles (fox 2) are much harder if not impossible to flare. The tested missiles were the Aim-9M, R-73, and R-27T. Yes, we were out of afterburner doing these tests. Prior to this patch these missiles would have been flared off even at these ranges. Track files and Tacview are shown to back up my claim.
server-20241224-174944.trk
Tacview-20241224-174950-DCS-Host-1v1 miz2.zip.acmi
server-20241224-174211.trk