====== Ubuntu - Squid - Block Websites ======

You can block websites from the proxy users, just create a separate file that will be the list of domains you want to block and point that file from the squid configuration,

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===== Create a file to contain blocked websites =====

<code bash>
sudo touch /etc/squid/blocked
</code>

Then type all websites you want to block one per line in that file and save it.

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===== Configure Squid to block Websites =====

Change the squid configuration to block those websites under acl list and http_access list.

<file bash /etc/squid/squid.conf>
acl blocked_sites dstdomain "/etc/squid/blocked"

http_access deny blocked_sites
</file>

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===== Restart Squid =====

<code bash>
sudo systemctl restart squid
</code>

<WRAP info>
There are a lot of ready to use lists on the web and they are categorized, you can use them in squid, like MESD blacklists, Shalla’s Blacklists.
</WRAP>

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===== References =====

http://www.squidguard.org/blacklists.html

http://www.shallalist.de/

https://dsi.ut-capitole.fr/documentations/cache/squidguard_en.html#contrib