From LedHed's Wiki
Restart Squid Guard
squid -k reconfigure -f /etc/squid/squid.conf
Test Website Access from Command Line
echo "http://www.playboy.com {10.0.0.150}/ - - GET" | squidGuard -d -c /etc/squidGuard/squidGuard.conf
squid -k reconfigure -f /etc/squid/squid.conf
echo "http://www.playboy.com {10.0.0.150}/ - - GET" | squidGuard -d -c /etc/squidGuard/squidGuard.conf