The marketplace, on the Hack Forums website, was notorious for making it easy it launch attacks that knocked servers offline.
The section was "permanently shut down" because several attacks known to be co-ordinated via the forum caused web-wide disruption.
One regular victim of attacks arranged via Hack Forums welcomed the closure.
Security bug
"Unfortunately once again the few ruin it for the many," wrote Jesse LaBrocca, founder of Hack Forums, in a message explaining why the section was being closed.
