Google provides servers that
Lock SafeSearch (forcesafesearch.google.com) settings
in every Google and YouTube search. By adding a DNS entry for
www.google.com
and
www.youtube.com
(and
other relevant Google and YouTube country subdomains) that includes
a CNAME record pointing to
forcesafesearch.google.com
to
your DNS server configuration, you can ensure that all users on
your network are using strict safe search settings every time they
perform a Google or YouTube search. Keep in mind, however, that
this solution is not compatible with Safe Search Enforcement on
the firewall. Therefore, if you are using this option to force safe
search on Google, the best practice is to block access to other
search engines on the firewall by creating custom URL categories
and adding them to the block list in the URL Filtering profile.