From LedHed's Wiki
Check access to a website from the command line
echo "http://www.playboy.com {10.0.0.150}/ - - GET" | squidGuard -d -c /etc/squidGuard/squidGuard.conf
echo "http://www.playboy.com {10.0.0.150}/ - - GET" | squidGuard -d -c /etc/squidGuard/squidGuard.conf