HP 6120XG ProCurve Series 6120 Blade Switches Management and Configuration Gui - Page 225
SNTP Client Authentication, Requirements
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Time Protocols SNTP: Viewing, Selecting, and Configuring Even though the Time Sync Mode is set to Sntp, time synchronization is disabled because no sntp has disabled the SNTP Mode parameter. Figure 9-11. Example of Disabling Time Synchronization by Disabling the SNTP Mode SNTP Client Authentication Enabling SNTP authentication allows network devices such as HP ProCurve switches to validate the SNTP messages received from an NTP or SNTP server before updating the network time. NTP or SNTP servers and clients must be configured with the same set of authentication keys so that the servers can authenticate the messages they send and clients (HP ProCurve switches) can validate the received messages before updating the time. This feature provides support for SNTP client authentication on HP ProCurve switches, which addresses security considerations when deploying SNTP in a network. Requirements The following must be configured to enable SNTP client authentication on the switch. SNTP Client Authentication Support ■ Timesync mode must be SNTP. Use the timesync sntp command. (SNTP is disabled by default.) ■ SNTP must be in unicast or broadcast mode. See "Configuring Unicast and Broadcast Mode" on page 9-21. ■ The MD5 authentication mode must be selected. ■ An SNTP authentication key-identifier (key-id) must be configured on the switch and a value (key-value) must be provided for the authenti cation key. A maximum of 8 sets of key-id and key-value can be configured on the switch. 9-17
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