Our company site is built with Silverstripe 2.4.4 and we are very happy with it, but we're having a small problem... Sometimes we are "visited" by some script/bot that (I think) scans the 'net looking for buffer overflows, and every time this results in 10 warning e-mails being sent to the site admin. Every mail has subject "Warning: Director::protocolAndHost() lacks sufficient information - HTTP_HOST not set."
I tried adding to mysite/_config.php the following:
$_FILE_TO_URL_MAPPING['/var/www/cms'] = 'http://our.site.com';