At one of my schools they requested access to the web interface of a printer so that they could monitor toner levels etc...
So i created a record on the DNS server called "printer" and pointed it to the printers ip. launched firefox and typed in "http://printer/" (assuming that because the dhcp server sets the DNS Suffix to domain.local it would append it for me) and i get greeted by a smarfilter message. try printer.domain.local and again smart filtered. so i sent a request to have it unblocked with the message "This is an internal network address for one of my printers".
I got an email back saying
Originally Posted by filter
The filter only restricts access to internet sites. If you are experiencing access problems within a school intranet then contact an the school network administrator.
which isnt very helpful. At this point i decided to do a little research into what exactly was blocked.
I knew that for the IP you have to put in a proxy bypass, but i was setting up a DNS domain name specifically so that i didnt have to do that. Plus for staff "Printer" is much easier to rember than "10.x.x.x"