How can I force my users to use the various search engine's safe search features?
Disclaimer: When Safe-Search CPL is used and enabled for turning on restricted mode on any 3rd Party Apps, e.g. Google search or Youtube, the behaviors of what that 3rd Party App decides to deem innapropriate is based on that 3rd Party apps setting and not part of the Proxy decision. ProxySG is simply turning on the restricted mode for the 3rd Party App alone, for it to make the decisions based on the approved points set by that 3rd Party App.
What is SafeSearch for Search Engines?
Many search engine users prefer not to have adult sites included in their image search results. SafeSearch is a function that filters out obscene content when you search for images on Google, Yahoo, Bing and other search engines
SafeSearch filters screen for sites that contain pornography and other explicit sexual content and eliminate them from search results. Google and Yahoo filters check keywords and phrases, URLs and Open Directory categories to screen out potentially offensive material.
There are three levels when you use Google’s SafeSearch mode.
Use strict filtering. (Filter both explicit text and explicit images)
Use moderate filtering. (Filter explicit images only - default behavior)
Do not filter my search results.
There are two level when you use Yahoo’s SafeSearch mode.
Filter out mature images.
Do not filter image results.
Using a Blue Coat ProxySG, a security administrator can configure a policy on the proxy to always enable the SafeSearch (strict filtering) when a user accesses Google or Yahoo web sites and searches for images.
Popular content filtering databases may not help block certain searches made by users who use Google or Yahoo. SmartFilter, for example, does not list the search results as part as its database, so a Blue Coat ProxySG filter can be used to block (or reduce) offensive search results.
Using a URL rewrite, a network administrator can force the SafeSearch feature to be enabled for all Google and Yahoo image searches. This is true even for users who try to change these settings from their desktop.
After you implement this policy, the images that come up in any search for material on images.google.com or on images.yahoo.search.com are much less offensive.
How is this feature implemented?
You enable SafeSearch by adding &safe=active and &vm=r to the Google and Yahoo query strings, respectively—by following the steps in the next section. Note that the policy includes both Google and Yahoo settings, but sections of the code can be commented out to only use one search engine or the other.
Since many search engines are now SSL, this policy will not work without enabling SSL interception.
Implementing a Blue Coat SafeSearch Policy
The SafeSearch policy can be implemented to help safeguard users from searching Google or Yahoo images with SafeSearch turned off. There are four simple steps to deploy this policy:
Download and save the pre-defined Blue Coat Policy. (You will need to unzip the file).
Modify the policy to meet your requirements.
Open the Blue Coat management console to the archive page.
Install the policy and review the results.
Step 1 Downloading the Blue Coat Policy
Copy the SafeSearch policy to your local PC. The policy is attached at the bottom of this knowledge base article.
Step 2 Modifying Parameters
You may need to modify some parameters in the copied policy to customize the desired effect for your environment. For example, you may need to modify the policy for only Google or Yahoo.
Step 3 Installing the local policy
Using the ProxySG Management Console, open the VPM
In the VPM you create a new CPL layer, name it "SafeSearch".
Open the safe search CPL file (Safesearch.txt), copy the text to the new CPL layer
Install Policy, verify that the policy installed without any errors.
Step 4 Test Policy
Access Google or Yahoo images and try to change the SafeSearch mode to “off.” The policy will reset SafeSearch to “on” each time the request goes out.
The Blue Coat ProxySG lets a security administrator create a policy that will enable SafeSearch. This policy filters out obscene content for all users who access Google or Yahoo The SafeSearch feature helps your company to maintain greater control over the type of information accessed during company hours and when using company resources.
If you using option to block search engines without safe search patterns defined then please check this article