We cannot deny the benefits that the Internet had been given to mankind. However, besides those advantages, it still has some limitations that can harm us if we are not careful in the way we use it. In addition to the websites that serve the purpose of learning and researching, there are also a lot of websites that contain unhealthy content that may directly affect our psyche and perception. Cybercriminals are also a serious problem today, as our important personal information is always at the risk of being stolen every day. Furthermore, the Internet has a mysterious fascination which is hard for us resist, so many people had become addicted to online surfing. They can spend most of their day sitting in front of the computer without working, or even eating and sleeping. If we are not aware of the disadvantages of the Internet, it will become a direct threat to our lives. Therefore, besides learning and entertaining on some websites on the Internet, we also need to limit the time and content that can be accessed to create a secure virtual environment.