[shady001]

As i said before, someone is trying to find your rcon password , if you don't want him to find it out just use a long rcon password (min 10 char long) and using all kinds of caracters like ^$†Ъ§ etc.(because the procesc of brute rcon is taking very very long is you use a password <= 10 char and special simbols ~ hundred of hours ... so he will probably give up and never find out your password).

So the solution is : Rcon_password >= 10 characters and using special caracters(†Ъ§)