The malware protection for large companies connected to the web has become something standard and expected of them. Twitter started to shorten all links with the t.co therefore, to prevent some malicious site were affected. Beyond it, Google already has for many years a tool that detects infected pages and displays a warning that this tool is used by several other companies. With the increasing number of users, Facebook had to think a similar strategy. And it seems he could.
Those working in large companies with an Internet connection have probably stumbled upon a screen of Websense or any similar service with them. They are known to block access to certain sites that are deemed unproductive in the business environment, such as social networking and video sites. But in the case of Facebook, they will help prevent attacks and dissemination of spam, malware and viruses in the social network, since the database of Websense is extensive and is constantly updated.
With the new filter, released all the links in posts on Facebook will by Websense, which will allow or block access to the site the link. If the link is blocked Facebook will display the alert displayed in the image above and the user will still have the option to ignore it and access the site anyway.
Facebook has been using since the beginning of the year a service link analysis, but it proved ineffective because spammers constantly switching the field of URLs and the service could not keep pace.