CLEO Thread, Problems with the smart filter in Regional Broadband Consortiums (RBC); At one of my schools they requested access to the web interface of a printer so that they could monitor ...
9th June 2009, 10:28 AM #1
Problems with the smart filter
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
which isnt very helpful. At this point i decided to do a little research into what exactly was blocked.
Originally Posted by filter
http://printer/ - Blocked
http://linkstation/ - Blocked
http://fog/ - Unblocked
http://hpserver - Blocked
Obviously the message i got from the filter is implying that all 4 of those addresses should be unblocked.
Anyone know why these addresses are filtered?
IDG Tech News
9th June 2009, 10:35 AM #2
I assume the printers are using local fixed ip addresses....
You will need to modify the Proxy connection settings with IE, so that local ip addresses don't use the proxy server.
Tools > Internet Options > Connections > LAN Settings:
Enable (Tick) bypass proxy for local addresses
You may have to go into the Advanced settings are enter part of the fixed ip address ranged in:
Do not use proxy server for addresses beginning with
for example 10.*;10.192.* etc etc
Just realised you're using Firefox, same principle applies but i've not got FF to hand for correct procedure.
Last edited by MYK-IT; 9th June 2009 at 10:38 AM.
9th June 2009, 10:42 AM #3
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"
9th June 2009, 10:44 AM #4
You may run into problems here - because these won't be resolved as local IPs until they hit the filter. You should be telling the browser not to proxy for these hostnames either.
If your smartfilter box is local, there's no reason why you wouldn't be able to access these devices through it - I presume they give you the opportunity to add a custom whitelist?
Thanks to tom_newton from:
9th June 2009, 11:13 AM #5
The Smart Filter box is at CLEO, it looks like im just going to have to add the hostnames to the proxy bypass list.
9th June 2009, 12:10 PM #6
if you can add wildcards or partials, it might be good to add *.local, and have folk bookmark/access these as fooprinter.local. Saves you adding a new one every time!
Originally Posted by Arcath
Certain popular web browsers don't always cope awfully well with one-word dns names either, so its a win-win
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