If you want to prevent certain users from accessing specific websites on a SOHO router, what should you configure?

To prevent certain users from accessing specific websites on a small office/home office (SOHO) router, configuring parental controls is the appropriate choice. Parental controls are designed to restrict access to certain content based on predefined rules, which can include blocking specific websites or categories of websites. This functionality allows you to manage and filter internet access for devices on your network, making it an effective solution for controlling user access based on your requirements.

MAC filtering is used to allow or deny network access to devices based on their MAC addresses but does not provide the capability to restrict specific website access. Disabling unused ports enhances security by reducing potential vulnerabilities but does not involve web content filtering. Port forwarding is primarily used to direct traffic from the internet to specific devices within a private network, which is unrelated to restricting website access. Thus, parental controls are specifically intended for managing online content and are the best choice in this scenario.