As social media use has risen, so has its abuse among employees. More than 70 percent of businesses have had to take disciplinary action against employees for misusing social media, and more than 80 percent of employers anticipate such misuse will become an even bigger issue in the future. There are different ways to block social Facebook but this is one of the easiest and efficient way. It is important to note that every task that is carried out by the router utilizes resource such as memory and CPU. This rule was designed to use little resource when blocking Facebook.
The first thing that you need to do is to create a Layer 7 regex using the code below:
Now you will need to create a firewall filter rule to identify request to the Facebook URLs and block it.