is there a way to find out where the request is bing denied ? Im trying the ip_user external helper ( as per the book) external_acl_type ip_user_helper %SRC %LOGIN /usr/libexec/squid/ip_user_check -f /etc/squid/ip_user.conf and # cat /etc/squid/ip_user.conf 192.168.0.0/24 andrew hepworth squid # if it returns the user name , can i then control further access with the user name ? I get an access denied - is there a way of showing how its processing the ACLs ?