Restrict Squid access to only one site

Have a look at the squid FAQ, there is a perfect example for your setup.

 acl GOOD dst 10.0.0.1 http_access allow GOOD http_access deny all

if you want to match by domain-name

 acl GOOD dstdomain .amazon.ie http_access allow GOOD http_access deny all

linux ubuntu squid

Here is another way, where you can specify the source IP addres. And block specific sites such as youtube facebook

acl liberaip src 130.44.0.215acl block url_regex -i youtube facebookhttp_access allow liberaip !block

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