acl blocked_site dstdomain .blockedsite.com http_access deny blocked_site and if you want to block a list of site then make a file listed all sites EXP.( in path /usr/local/squid/ ) blocksite.txt
add sites like this format .abc.com .xyz.com .exp.com .blockedsite.com acl blocked_site dstdomain "/usr/local/squid/blocksite.txt" http_access deny blocked_sites
