On Wed, 4 Feb 2004, Markus Feilner wrote:

> This works fine, only members of a certain group may access the 
> internet. When a new user is added to the Active Directory Group, it is 
> almost immediately recognized by squid, 

So you have a low negative ttl for the group helper.

> But not when it is deleted! it may take up to four days, until this user 
> is blocked from accessing the internet. Only a restart of squid can 
> change this. Then automatically all the new data is used.

Then use a low positive ttl for the group helper.

See external_acl_type.

Regards
Henrik

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