[string227]

Alright, in my server console I found this:

[16:42:26] Incomming connection: 200.192.251.120:1407
[16:42:26] [join] rafael has joined the server (0:200.192.251.120)
[16:48:50] [part] rafael has left the server (0:1)
[16:54:27] Detected possible bot from (200.192.251.120)
[16:54:30] Incomming connection: 200.192.251.120:1461

Apparently the IP is coming from some country in Brazil.

Should I be worried about this?

[Snyper18]

It could possibly continue to lag/crash your server, I suggest to ban the IP unless its an actuall player.