http://en.wikipedia.org/wiki/Easement

Easement being the legal term for allowing passage across anothers' land or property to one's own property or land.
Duldungsdienstbarkeit would be toleration or sufferance of such a state of affairs.

The URL below goes to a court decision concerning an Unterlassungsdienstbarkeit (in this case, a prohibition against selling beverages).

By contrast to an affirmative easement.
Just enter "easement" into Wikipedia and you'll find a list of the most common types of easement and explanations thereto.

An affirmative easement is the right to use another's property for a specific purpose, while a negative easement is a restriction the right to prevent an otherwise lawful activity on another's property.

For example, an affirmative easement might allow land owner A to drive their cattle over the land of B. A has an affirmative easement from B.

Conversely, a negative easement might restrict B from blocking A's mountain view by putting up a wall of trees. A has a negative easement from B.

Grüße!

I've done some research and found that the German term Unterlassungsdienstbarkeit derives from Latin: servitus quae in non faciendo consistunt, which, when translated into English, are the same as negative easements or passive servitudes. I have also established that the terms do exist in legal English. A negative easement is a type of easement that can be exercised to prevent the owner of a piece of land from using it. A negative easement might restrict B from blocking A's mountain view by putting up a wall of trees. A has a negative easement from B.