Block a domain name in squid linux

FREQUENTLY ASKED QUESTIONS (Squid proxy)
Q: How to block a website (domain) in squid proxy server?

Squid can deny users accessing a specific website with a access denied error message. It can be done with squid "dstdomain" access lists (ACL).

Edit the squid.conf configuration file
[root@server ~]# vi /etc/squid/squid.conf

acl lan src 192.168.10.0/24                         # client ip range to block web sites

acl bad_sites dstdomain .foo.com .fooo.com            #Block two domains in single acl

http_reply_access deny bad_sites lan

#Add the above three lines and save the squid.conf file

Now squid server will deny browsing if anyone from the acl "lan" access the domain foo.com and fooo.com.

Note: Squid will also deny all sub domains of the blocked domain. for example if you block google.com, all Google's sub domains like news.google.com, maps.google.com,etc will also be blocked

Restart or reload squid with configuration changes

root@server ~]# service squid restart

or

root@server ~]# service squid reload


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LABELS: CentOS, Debian, extra-tips, FAQ, Fedora, linux, Redhat, Squid Proxy, Ubuntu