Can you post me a default config with my three lines in it, so that the IP-Adress is using the whitelist defined and any other IPs can reach any site? Try below lines # Define the pc/ip, which has to squid later acl pc101 src 192.168.100.101/255.255.255.255 # define the whitelist acl whitelist url_regex -i "/squid/etc/whitelist.allow" http_access deny pc101 !whitelist then, create below file. touch /squid/etc/whitelist.allow and add below domains to that file. .allowedsites1.com .allowedsites2.com .allowedsites3.com #the rest has FULL ACCESS acl mynet 192.168.100.0/24 http_access allow mynet restart squid Happy Squiding -- Thank you Indunil Jayasooriya