# Whatever Virtuoso is trying to do, it is extremely abusive of our server. It has never even fetched this "robots.txt" yet generates 1M hits/week!
# Ban their user agent
User-agent: Mozilla/4.0 (compatible; Virtuoso)
Disallow: /
# Ban their package in the future
User-agent: Virtuoso
Disallow: /

# Ban demo.OpenLinkSW.com by IP
# 63.119.36.50
# and a random server, perhaps from the Netherlands
# 82.94.249.194
# and a random Amazon EC2 server
# 75.101.133.127
#
# -- Rohit Khare, 31 October 2010