How to prevent connection to the server from the server IP?

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  Hello. We have a small game hosting. There is a modification that launches bots on the server (it is located on our equipment), while from the same server (that is, the same IP of the server and incoming connections, bots).
  How can you limit this? With some rules. We will be glad to help.

  Ubuntu Anonymous, Mar 12, 2020

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1 Answers
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  iptables -I INPUT -s 11.22.33.44 -p tcp --dport 5566 -j DROP
  
  iptables -I INPUT -s 11.22.33.44 -p udp --dport 5566 -j DROP
  
  iptables -I INPUT -s 127.0.0.1/8 -p tcp --dport 5566 -j DROP
  
  iptables -I INPUT -s 127.0.0.1/8 -p udp --dport 5566 -j DROP

  
  
  here 11.22.33.44 - server IP address
  
  5566 - port number (if only UDP or TCP is used, then remove two unnecessary rules).

  Anonymous

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