The Hainberg, and therefore the Bodensteiner Klippen, are a Natura2000 nature protection area, highest protection the EU can offer, so mind your step. Always check regulations, closures and zoning:
Due to a dispute with the owner, climbing is only allowed in the district of Goslar (southern area). Everything south of 'Strauchköpfe' is part of Goslar. Check the links above for more information.
For your own safety: On some cliffs someone sawed off the bolts. Check the conditions of the bolts before use.
Also, don't argue with local hunters, you might get shot.