The eligibility criteria to join NIT Durgapur is that you must have completed 12th class by the time you apply for admission.
Getting a decent rank in JEE MAIN entrance examination (formerly known as AIEEE) could get you placed in this college.
For my course(Information Technology) the opening rank was approx. 10000 and the closing rank was 16000 for general category students(other than West Bengal state students) when I joined.
Ranks vary by category and the state of residence.