The ADSL modem used by the author is Fandu 85 1-E, which can be managed through the Web interface. Open the browser of the computer that can communicate with ADSL modem, enter the IP address 10.0.0.2 in the address bar, and enter the user name and password in the prompt window that appears later. In the webpage settings, click the hyperlink "Routing Table" in the left frame? Routing table? , you can enter the page of managing routes. The current routing table is as follows:
The IP address of the first project is 0.0.0.0, which means the default route is defined. The function of the default route is to prevent the entries in the routing table that match the destination address from being sent to the default gateway. According to the second item in the routing table, the internal network accesses the external network through the gateway 61.175.141.50? Using PPPoE to dial, ADSL modem temporarily obtains IP address from ISP? . The third item is the loopback interface, which is used for ADSL modems to send data to themselves.
Suppose a website needs to restrict users' access, we can know that the IP address of the website is XXX. XXX。 XXX。 If you want to restrict IP, you need to add an item in the routing table, with the destination address of "xxx.xxx.xxx", subnet mask of "255.255.255" and gateway of "10.0.0.200" (enter the unused IP address in the intranet in this column. If you want to limit this IP segment? XXX。 XXX.XXX. 1~XXX。 XXX.XXX.254？ , you need to add an item to the routing table, with the destination address of "xxx.xxx.0", subnet mask of "255.255.255.0" and gateway of "10.0.0.200".
Enter the corresponding data in the "Routing Table" page of the management interface, select "Add" in the "Action" column, and click "Submit" (as shown). Go to the Save Configuration page on the left and click Submit. The setting will take effect after the ADSL modem is restarted. At this point, you can restrict the access rights of intranet users.
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