Tarpit (networking)
A tarpit (also known as Teergrube, the German word for tarpit ( )) is a service on a computer system (usually a server) that purposefully delays incoming connections. The technique was developed as a defense against a computer worm, and the idea is that network abuses such as spamming or broad scanning are less effective, and therefore less attractive, if they take too long. The concept is analogous with a tar pit, in which animals can get bogged down and slowly sink under the surface.
Read more about Tarpit (networking): SMTP Tarpits, IP-level Tarpits, The Original Tarpit Idea, Mixed SMTP-IP Level Tarpits, Commercial Implementations of Tar-pitting