Allied Telesis AT-FS970M Series - Manual (Page 240)

Chapter 20: Access Control Lists (ACL)
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Figure 96. Traffic Classifiers Page from Policies/ACLs Page
4. Click a radio button to select an ACL.
5. Check one or multiple port numbers to select ports to apply the ACL.
6. Click Apply.
7. Click SAVE to save your changes to the startup configuration file.