Dell PowerSwitch S5212F-ON SmartFabric OS10 Security Best Practices Guide July - Page 18
NTP rules
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Enable audit logging Rationale: To monitor user activity and configuration changes on the switch, enable the audit log. Only the sysadmin and secadmin roles can enable, view, and clear the audit log. Configuration: • Configure audit logging. OS10(config)# logging audit enable OS10(config)# exit OS10# write memory • View audit log. show logging audit [reverse] [number] ○ reverse -Display entries starting with the most recent events. ○ number-Display the specified number of audit log entries users, from 1 to 65535. NTP rules Network Time Protocol (NTP) synchronizes timekeeping among a set of distributed time servers and clients and coordinates time distribution in a large, diverse network. NTP clients synchronize with NTP servers that provide accurate time measurement. Configure trusted NTP server Rationale: Configure the system to synchronize time from a trusted NTP server. Configuration: OS10(config)# ntp server ntp1-server-ip-address OS10(config)# exit OS10# write memory ntp1-server-ip-address-Enter the IPv4 address in A.B.C.D format or IPv6 address in A::B format of the NTP server. Configure trusted secondary NTP server Rationale: Configure the system to synchronize time from a trusted secondary NTP server. Configuration: OS10(config)# ntp server ntp2-server-ip-address OS10(config)# exit OS10# write memory ntp1-server-ip-address-Enter the IPv4 address in A.B.C.D format or IPv6 address in A::B format of the NTP server. Configure NTP authentication Rationale: NTP authentication and the corresponding trusted key provide a reliable exchange of NTP packets with trusted time sources. NTP authentication uses the message digest 5 (MD5) algorithm. The key is embedded in the synchronization packet that is sent to an NTP time source. Configuration: OS10(config)# ntp authentication-key number {sha1 | sha2-256} key OS10(config)# ntp master {2-10} OS10(config)# exit OS10# write memory • number-Enter the authentication key number, from 1 to 4294967295. • sha1-Set to SHA1 encryption. • sha2-256-Set to sha2-256 encryption. 18 OS10 security best practices
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