[K12OSN] Does squidGuard do reverse lookups on URL's with IP address?

[Terrell Prude', Jr.]

Mike Rambo wrote:

>On Fri, 2004-02-20 at 12:33, dale.quigg at aspentech.com wrote:
>  
>
>>Hi,
>>
>>I'm looking to create a web filter using squidGuard and the blacklists on
>>squidguard.mesd.k12.or.us::filtering
>>
>>It looks to me like the porn/domains file does not contain IP addresses for
>>all the sites listed.  Is it then possible for users to enter the IP address
>>for blocked sites and bypass the filtering?
>>
>>I know that DansGuardian has an option to do a reverse lookup on entered IPs
>>and compare to the blacklist, but I don't know if this is/can be handled by
>>squidGuard.
>>
>>    
>>
>
>Unfortunately squidGuard doesn't do this AFAIK. We always enter sites by
>both url and ip when we put stuff in local-block. Since the rest of the
>domains don't have both url and ip, at least for everything, it sadly is
>open to that extent. It would be great if this could be added as it
>seems to us the single biggest deficiency with SG. We tried DG once
>because of that issue but couldn't use it because it doesn't support
>multiple levels of filtering - or didn't at that time. Administration
>has declared different levels of filtering for admin, high school,
>middle school, and elementary school here so one size doesn't fit all.
> 
>
>  
>
Here´s how we handle that multiple filtering level issue at my 
district.  We have multiple servers.  There is one set of filtering 
servers for the ES´s, the MS´s are on another set, and each HS is on its 
own.  Now, of course, you could have a bank of servers for the HS level 
as well, and one for admin sites.  We do each HS individually because 
some of them pay for access to certain Web apps (an example might be, 
say, www.BlackBoard.com), and the company selling the service 
¨authenticates¨ by checking the source IP address.  We thus give that 
company the proxy server´s ¨external¨ IP address, and boom, that high 
school has access to the app.
 
--TP
------------------------------------------------------------------------
Do you GNU!?
Free/Open Source: Get back control of your computer fast, especially 
when online :-) <http://www.k12ltsp.org/>