[[KaE]Cartman]

This is what I saw in my server's log today:

Код:

19:47:18] Detected possible bot from (201.67.203.242)
[19:47:18] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:18] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:18] Detected possible bot from (201.67.203.242)
[19:47:18] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:18] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:18] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:18] Detected possible bot from (201.67.203.242)
[19:47:18] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:18] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:19] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:19] Detected possible bot from (201.67.203.242)
[19:47:19] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:19] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:19] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:19] BAD RCON ATTEMPT BY: 201.67.203.242
[19:47:19] Detected possible bot from (201.67.203.242)

This is just a little part of the log, this person tried many times for minute stole the rcon. Is there any FS or something that protect me of this bot attack?
Thanks for the help, I really don't know what to do.