SetEnvIfNoCase User-Agent ^Httrack keep_away
SetEnvIfNoCase User-Agent ^Offline Explorer keep_away
SetEnvIfNoCase User-Agent ^psbot keep_away
SetEnvIfNoCase User-Agent ^Teleport keep_away
SetEnvIfNoCase User-Agent ^WebCopier keep_away
SetEnvIfNoCase User-Agent ^WebReaper keep_away
SetEnvIfNoCase User-Agent ^Webstripper keep_away

Order Allow,Deny
Allow from all
Deny from env=keep_away