How can you make a computer in a LAN only access 4 extranet web pages?

2. Make an ACL access control list on the LAN gateway device, the principle is: deny all IP addresses in the LAN to access the external network, and allow all IP addresses in the LAN to only access the corresponding IPs of these four **(Note that ACLs are applied in a way that is either depth-first or sequential matching).

Two: There may be some Chinese web operation of this kind of equipment can achieve access control, probably the business pilot Cisco equipment of telecommunications can be (like hehe), the rest is not known.

You don't have to use a firewall, a switch can do that.

The firewall is more likely to prevent unauthorized detection and intrusion of external network resources into internal network resources. The concept needs to be clear.

If you are a business, it is recommended to use hardware devices If you are an individual, or software is more appropriate.

Today it occurred to me that your router does not set a default route, which refers to the route of the IP addresses of these four web pages.

You need to add a firewall, and the firewall settings can only pass through the firewall for the IP data of these four web pages, and only the HTTP protocol.

Your router has no restriction features, and if there is, you can set up a whitelist. If you don't have one, you have to go to a network management software, such as Jusheng network management

Install firewalls inside and outside, if it is a confidential network, use Zhongke Netwei, if it is ordinary, use a Peking University square on the line.

Operating Tools: Computer.

Operating system: win10

The specific operation of LAN access to another computer is as follows:

1. In the lower right corner of your local computer, there is a sign of a liter of oak branch Internet connection, click on it like a sail, a menu will pop up, select "Network and Internet Connection" and click on it. (as shown in the image below).

2. At the bottom of the right side of the main interface of the network and Internet connection, there is a setting of sharing options, which is to set the settings of the content we want to share, click on it. (as shown in the image below).

3. In the sharing option settings, find "Network Discovery" and "File and Printer Sharing", turn on both enabling switches, and then click OK. (as shown in the image below).

4. Find a file to share on your local computer, select it, then right-click and select "Properties". (as shown in the image below).

5. After entering the properties of the file, in the menu bar at the top, click "Share", in the menu bar, click the "Share" button to share, and then click OK, so that the file will be shared to the local noise network. (as shown in the image below).