Hi,
The best is to check in literature or to cross check with the force field authors
Here setting for amber99sb-ildn. Note the following mdp setting depends on the force field.
constraints = h-bonds ; bonds involving H are constrained
rcoulomb = 1.0 ; short-range electrostatic cutoff (in nm)
rvdw = 1.0 ; short-range van der Waals cutoff (in nm)
vdw-modifier = Potential-shift-Verlet ; Amber specific
DispCorr = EnerPres ; account for cut-off vdW scheme
coulombtype = PME ; Particle Mesh Ewald for long-range electrostatics
fourierspacing = 0.125 ; grid spacing for FFT