504 CHAPTER 12: USING SYSTEM MANAGEMENT COMMANDSserver 127.0.0.1,stratum 8, offset 0.000000, synch distance 0.00000refid 127.127.1.0ntp-service access Syntaxntp-service access { query | synchronization | server | peer }acl-numberundo ntp-service access { query | synchronization | server | peer }ViewSystem view.Parametersquery: Allow to control query authority.synchronization: Only allow the server to access.server: Allow query to server and access.peer: Full access authority.acl-number: IP address list number, ranging from 2000 to 2999.DescriptionUse the ntp-service access command to set the authority to access the localequipment. Use the undo ntp-service access command to cancel the accessauthority settings.By default, there is no limit to the access.Set authority to access the NTP services on a local Switch. This is a basic and briefsecurity measure, compared to authentication. An access request will be matchedwith peer, serve, serve only, and query only in an ascending order of thelimitation. The first matched authority will be given.ExampleGive the authority of time request, query control and synchronization with thelocal equipment to the peer in ACL 2076.system-viewSystem View: return to User View with Ctrl+Z.[SW5500]ntp-service access peer 2076Give the authority of time request and query control of the local equipment to thepeer in ACL 2028.system-viewSystem View: return to User View with Ctrl+Z.[SW5500]ntp-service access synchronization 2028ntp-serviceauthentication enableSyntaxntp-service authentication enableundo ntp-service authentication enableViewSystem view
