Here are two authentic ways “Narak-dvār” is used in Jain tradition. Please pick the one you meant:

1) Seven levels of Naraka (Adho-loka) These are the seven infernal grounds. Many people casually call them “Narak ke dvār,” but scriptures describe them as seven bhūmis:

• Ratna-prabhā
• Sharkarā-prabhā
• Vāluka-prabhā
• Panka-prabhā
• Dhūma-prabhā
• Tamah-prabhā
• Mahātamah-prabhā

2) “Gates” leading a soul toward hellish birth (ethical causes) Jain āgamas emphasize the four kaṣāyas (passions) as the main “doors” that lead to naraka:

• Krodh (anger)
• Māna (pride/ego)
• Māyā (deceit)
• Lobha (greed)

Notes

• Both Digambar and Śvetāmbara traditions accept these seven infernal levels and the four kaṣāyas as prime causes for hellish birth.
• In pravachans you may also hear rāga (attachment), dveṣa (aversion), and hiṁsā (violence) mentioned, but the core “dvār” are the four kaṣāyas.

For a simple explanation of the four kaṣāyas, see this short note