FTP Attack ??

hello,
i get the follwing FTP access from same IPaddress to differen IP addresses on my server:

Nov 14 11:00:40 server pure-ftpd: (?@11.11.11.11) [ERROR] Unable to set up secure anonymous FTP
Nov 14 11:00:40 server pure-ftpd: (?@11.11.11.11) [INFO] Anonymous user logged in the virtual FTP: 00.00.00.1
Nov 14 11:00:40 server pure-ftpd: (?@11.11.11.11) [INFO] Anonymous user logged in the virtual FTP: 00.00.00.2
Nov 14 11:00:40 server pure-ftpd: (?@11.11.11.11) [INFO] Anonymous user logged in the virtual FTP: 00.00.00.3
Nov 14 11:00:40 server pure-ftpd: (?@11.11.11.11) [ERROR] Unable to set up secure anonymous FTP
Nov 14 11:00:40 server pure-ftpd: (?@11.11.11.11) [ERROR] Unable to set up secure anonymous FTP
Nov 14 11:00:40 server pure-ftpd: (?@11.11.11.11) [INFO] Anonymous user logged in the virtual FTP: 00.00.00.4
Nov 14 11:00:40 server pure-ftpd: (?@11.11.11.11) [INFO] Anonymous user logged in the virtual FTP: 00.00.00.5


Then PRM suspended the process:
--------------------------
- Event Summary:
USER: nobody
PID : 8525
CMD : /usr/local/apache/bin/httpd
CPU%: 0 (limit: 30)
MEM%: 1 (limit: 25)
PROCS: 115 (limit: 20)
------------------------

However the server reboots as the load was at 15.00
Is there any way to block such as attacks?
I have Anonymus FTP Disable

thanks

 

 

 

 

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