Looking for some clarification on this alert entry on one of my FreeNAS servers so i can start troubleshooting this. Not sure where to look right now.
[
WARNING
8 SSH login failures: Feb 29 21:10:03 FreeNAS-L3426 sshd[60533]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:10:04 FreeNAS-L3426 sshd[60537]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:33 FreeNAS-L3426 sshd[60608]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:35 FreeNAS-L3426 sshd[60615]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:36 FreeNAS-L3426 sshd[60617]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:39 FreeNAS-L3426 sshd[60629]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:40 FreeNAS-L3426 sshd[60631]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:52 FreeNAS-L3426 sshd[60648]: error: kex_exchange_identification: banner line contains invalid characters
Sun, 1 Mar 2020 12:00:31 AM (CET)
[
WARNING
8 SSH login failures: Feb 29 21:10:03 FreeNAS-L3426 sshd[60533]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:10:04 FreeNAS-L3426 sshd[60537]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:33 FreeNAS-L3426 sshd[60608]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:35 FreeNAS-L3426 sshd[60615]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:36 FreeNAS-L3426 sshd[60617]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:39 FreeNAS-L3426 sshd[60629]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:40 FreeNAS-L3426 sshd[60631]: error: kex_exchange_identification: banner line contains invalid characters Feb 29 21:13:52 FreeNAS-L3426 sshd[60648]: error: kex_exchange_identification: banner line contains invalid characters
Sun, 1 Mar 2020 12:00:31 AM (CET)