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Cisco | Configuring NTP Authentication

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Originally published at: https://www.cliwarriors.com/rs/cisco-configuring-ntp-authentication/

How to add authentication to your NTP configuration. cisco ntp authentication R1 – Server Router(config)#ntp master Router(config)#ntp source loopback 0 Router(config)#ntp authenticate Router(config)#ntp authentication-key 1 md5 changeme Router(config)#ntp trusted-key 1 ! !!reference!! ! Router(config)#ntp ? authenticate Authenticate time sources authentication-key Authentication key for trusted time sources master Act as NTP master clock source Configure interface…