The first squid is use to authenticate users with the wb_ntlmauth helper and then redirect the request to DG for filtering. The second squid is use to connect to internet to resolve the request.
The problem is: Dansguard didn�t see the real user, insted apply all the filter rules for all users and never update the access.log file (for denied access) and the cachedump file (for connected users) Example When i access an unfiltered site like www.google.com all seem good but when i access an filtered site like www.playboy.com i didn�t get the deny page, insted the url is show in the browser and all the body is empty and nothing is logged in the /var/log/dansguardian/access.log file. RGDS
