Dear Mr.Henrik Nordstrom, Thanks for your guidance. Yes, the problem solved after I login squid as user to run the squidguard. When I try to run squidguard using command line, I encountered many permission denied problems. I have changed the permission accordingly. Now my squidguard works smoothly. Many thanks to you, and to those who faced similar problems like me, especially Sussane Andrews, please check your squid access permission too. All the best! :-D Best Regards, Simon Teh Network and System Administrator National Advanced IPv6 Centre of Excellence, School of Computer Science, Universiti Sains Malaysia -----Original Message----- From: Henrik Nordstrom [mailto:henrik@xxxxxxxxxxxxxxxxxxx] Sent: Wednesday, September 26, 2007 5:28 PM To: chteh Cc: squid-users@xxxxxxxxxxxxxxx Subject: RE: squid 2.6 and squidguard 1.2.0 problems On ons, 2007-09-26 at 16:11 +0800, chteh wrote: > Dear Mr.Henrik Nordstrom, > > For the cache_effective_user, I read about that in the squid mailing list. > Could you please elaborate more about this part? I think I almost try > everything but not this part yet. > > Is it means that I need to insert these 2 lines in the squid.conf? > > cache_effective_user squid > cache_effective_group squid It mans that you need to test SquidGuard from the user account cache_effective_user is set to. It's always set to something as there is a built-in default even if you don't specify it in your squid.conf. See squid.conf.default for the default setting, usually "nobody" or "squid". To change user to the "squid" user you can use the following: su - squid to verify the user identity after su use the "id" command. If still root then the user is probably blocked for interactive use, and you can try su -s /bin/sh - squid instead..