Offers safe search on individual computers or network-wide through Google’s safe search virtual IP address:

In the Google Search Settings, the Filter explicit results setting enables safe search functionality. When enabled, the setting is stored in a browser cookie as FF= and passed to the server each time the user performs a Google search.

Appending safe=active to a Google search query URL also enables the strictest safe search settings.

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.

Offers safe search on individual computers only. The Yahoo Search Preferences includes three SafeSearch settings: Strict, Moderate, or Off. When enabled, the setting is stored in a browser cookie as vm= and passed to the server each time the user performs a Yahoo search.

Appending vm=r to a Yahoo search query URL also enables the strictest safe search settings.