I recently had to send the following e-mail to the owner of one of the sites I host:
Please don’t ban 127.0.0.1 – it’s the loopback address that allows the server to request its own website to check that it’s working properly. Thanks ^_^-Joshua
Cron <imbrius@dustpuppy> curl –silent –compressed http://localhost/cron.php
email@example.com (Cron Daemon)
Tue, 24 Nov 2009 13:45:02 -0600
firstname.lastname@example.orgSorry, 127.0.0.1 has been banned.
You can see how much fun it is to be a sysadmin. I know he meant well – 127.0.0.1 did seem to be taking up a lot of bandwidth and logged hundreds of hits per day with very little actual page view time, so it made sense to ban it. Except that then I get lots of e-mails from the cron daemon screaming that the site is down. 🙂