In today's society, network security is very important. For the U2000 network management system, the system Access Control List (ACL) must be set so that U2000 users can log in to the U2000 server only through the U2000 clients with specified IP addresses. After being set by security administrators, the system ACL applies to all U2000 users.
The steps are as follows:
1. Choose from the main menu (traditional style); alternatively, double-click Security Management in Application Center and choose from the main menu (application style).
2. In the System ACL dialog box, you can view existing ACLs. You can click Add, Delete, or Modify to add, delete, or modify a system ACL item, and click OK or Yes for the settings to take effect.
3. Adding a system ACL item:
a) In the System ACL dialog box, click Add.
b) In the Add System Access Control Item dialog box, select the display mode of IP addresses, set the related parameters, and click OK.
4. Modifying a system ACL item:
a) In the System ACL dialog box, select the system ACL item to be changed, and click Modify.
b) In the Modify System Access Control Item dialog box, modify the related parameters, and click OK.
c) In the Confirm dialog box, click Yes.

