Nieautoryzowany dostęp - bot?

Today, while at work, I noticed on one of the receivers a hanging session for over 4 hours listening in USB above 10Mhz outside the 30m band. I have an idle time limit of 30 minutes, only 4 people have an unlimited password to the receiver, but none of them have logged into SDR at that time. In a hurry, I lost the screenshot from the Kiwi website somewhere, but the log log was saved:

Fri Mar 25 12:15:59 18:10:16.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:16:09 18:10:26.177 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:16:19 18:10:36.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:16:29 18:10:46.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:16:39 18:10:56.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:16:49 18:11:06.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:16:59 18:11:16.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:17:09 18:11:26.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:17:19 18:11:36.180 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:17:29 18:11:46.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:17:39 18:11:56.180 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:17:49 18:12:06.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:17:59 18:12:16.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:18:09 18:12:26.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:18:19 18:12:36.176 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:18:29 18:12:46.180 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:18:39 18:12:56.180 .1..  1     TLIMIT-INACTIVE for 217.69.9.162
Fri Mar 25 12:18:49 18:13:06.177 .1..  1     TLIMIT-INACTIVE for 217.69.9.162

I already blocked this IP and changed the password to a more complicated one