in n9k switch,i found some log.What do these logs mean and do they have any impact on device operation?
| 2023 Sep 21 21:34:58.972161 %DAEMON-2-SYSTEM_MSG: fatal: PAM: pam_setcred(): Authentication failure - dcos_sshd[24351] |
| 2024 Jan 18 14:45:31.432277 CN-DC-ECS2 %DAEMON-3-SYSTEM_MSG: error: kex_exchange_identification: write: Broken pipe - dcos_sshd[24335] |
| 2024 Jan 18 14:44:04.649899 CN-DC-ECS2 %DAEMON-3-SYSTEM_MSG: error: protocol identification string lack carriage return - dcos_sshd[23364] |
| 2024 Jan 18 14:43:09.913359 CN-DC-ECS2 %DAEMON-3-SYSTEM_MSG: error: PAM: Authentication failure for illegal user shyang from 10.32.203.58 - dcos_sshd[21812 |
| 2024 Jan 17 07:05:57.693493 CN-DC-ECS2 %DAEMON-2-SYSTEM_MSG: fatal: PAM: pam_setcred(): Authentication failure - dcos_sshd[17076] |
| 2024 Jan 16 22:23:41.804398 CN-DR-ECS2 %DAEMON-2-SYSTEM_MSG: fatal: PAM: pam_setcred(): Authentication failure - dcos_sshd[11586] |
| 2024 Jan 15 03:44:16.473015 CN-DC-ECS1 %DAEMON-2-SYSTEM_MSG: fatal: PAM: pam_setcred(): Authentication failure - dcos_sshd[13318] |
| 2024 Jan 15 03:44:20.566819 CN-DC-ECS1 %DAEMON-3-SYSTEM_MSG: error: protocol identification string lack carriage return - dcos_sshd[13423] |
