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Re: block domains based on LDAP group and force re-authentication every 30 minutes

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On 18/02/2014 5:43 a.m., Scott Mayo wrote:
> On Mon, Feb 17, 2014 at 10:39 AM, Wim Ramakers
> <wim.ramakers@xxxxxxxxxxxx> wrote:
>> I forgot to paste the line in the first post, I’ve set  authenticate_cache_garbage_interval 5 minutes.
>>
>> Even after an hour I stayed authenticated, so I’ve changed it also to a lower value.
> 
> 
> I am curious to this also then.  I wonder if that is the browser.  Is
> there  a setting for how often a browser asks for authentication?
> 
> My assumption would be that the browser asks Squid for authentication.
>  Once it is authenticated with your LDAP, then it will not have to
> authenticate again until the browser asks again.  I may be totally
> wrong though.
> 

I think you are misunderstanding the authentication model in a big way.
The browser is only asking Squid for access to a resource (via its URL).

In a properly working authentication system the user will only be asked
for credentials 0 or 1 times *total*. This goes for all authentication
types.

http://wiki.squid-cache.org/Features/Authentication#How_does_Proxy_Authentication_work_in_Squid.3F

The behaviour you are seeing is because the credentials are still valid
in the authentication database.

NP: browsers do not provide any logout mechanism to users. The above
wiki page has an example of ACL configuration to force a change of
credentials.

Amos




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