All robots ought to be blocked by `/robots.txt` (not by `.htaccess`), like this:
# cat robots.txt
User-agent: *
Disallow: /
The file needs to be in the document root and world readable. Check by opening it in a web browser: ` should give the file contents.
Robots may technically chose not to follow this but really ought to. Bing does I am sure.
If for some reason (unlikely with the actual Bing) this does not work, try
# cat .htaccess
SetEnvIfNoCase User-Agent .*bot.* search_robot
SetEnvIfNoCase User-Agent .*bing.* search_robot
SetEnvIfNoCase User-Agent .*crawl.* search_robot
Order Deny,Allow
Deny from env=search_robot
Allow from All
You need to enable the `mod_setenvif` apache module for this, please see <