How to restrict website access and filter pages that are not allowed?

In terms of technical means, there are generally the following: 1. 1). Restrictions on routers, now some routers provide domain name filtering function, which can prohibit certain websites from accessing. 1.2). Restrict the firewall, and restrict the access of some IP by configuring the ACL rules of the firewall. 1.3). Use Internet management software for restrictions. Restrictions on routers and firewalls are relatively limited. Generally speaking, only certain domain names or IPS can be banned, which can not meet the needs of detail management, and the configuration is generally complicated. If you need to achieve better management, you should use professional online management software. Let's take the super dog sniffer software as an example to make a general introduction. 2. Use super sniffer dogs to restrict website access. Super sniffer dogs can enable different internet access strategies for each computer at different times, providing you with the following management methods: 2. 1). Website blacklist: some websites that are not allowed to visit are prohibited. 2.2). White list of websites: Only websites in the white list are allowed to visit. 2.3). Web page classification and filtering: 7 categories and 50 subcategories are provided. Can manage different types of websites, such as: prohibit downloading websites during entertainment and work hours. 2.4). Classified limited access: For example, news websites are only allowed to visit 1 hour a day. 2.5).URL keyword restriction function: you can prohibit the search for the specified keyword. 2.6). Visit warning function: When visiting some websites, warning pages will pop up. Please refer to the figure below: