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I want to limit 1 connect per 5 seconds using IPTABLES for people, which are connecting to port "12871/12881". I was trying to find rule for it, but ineffectively. It must be like a "queue" of connects - for example 1 connect per 5 seconds.

I had here discussion: How to limit 1 connect per 5 seconds? (IPTABLES) but Im not able to reply on this account, previous was unregistered and logged me out.

user322517
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1 Answers1

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Example: Limit Connections Per Second

The following example will drop incoming connections if IP make more than 3 connection attempts to port 12871:12881 within 5 seconds.

iptables -A INPUT -p tcp --dport 12871:12881 -i eth0 -m state --state NEW -m recent --set
iptables -A INPUT -p tcp --dport 12871:12881 -i eth0 -m state --state NEW -m recent --update --seconds 5 --hitcount 3 -j DROP

Just change eth0 to your interface id...

The hitcount and seconds can be tailored to your needs.

I don't know, but it seems like your hardware is just not up to running a HurtWorld server.

Try running it with these options: 

  - batchmode
  - nographics
  - exec "host 12871;queryport 12881"
  - servername whateveryouwant
  - addadmin "<My Steam ID>" 
  - logfile "gamelog.txt"

Ref:
https://hurtworld.gamepedia.com/Hosting_A_Server
https://linuxgsm.com/lgsm/hwserver/
https://docs.linuxgsm.com/configuration/linuxgsm-config

Michael Prokopec
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  • @Michale Prokopec If there will be at specific time more than 3 connects all the time no one will connect - they will try to connect until they won't do it. – user322517 Nov 23 '18 at 17:58
  • After 3 connection attempts in 5 seconds by the same IP that IP is ignored. You can change it so after 2 connection attempts within 2 seconds that IP is ignored. – Michael Prokopec Nov 23 '18 at 18:15
  • "wll drop incoming connections if IP make more than 3 connection". Server have 100 slots for players. In one time connects 100+ different IPs, so these connections are not making one user, but 100 different users. I must do something like: 1 player -> 5 seconds -> 2 player -> 5 seconds – user322517 Nov 23 '18 at 18:20
  • If the above will not work, the're are resource or other config issues if you're still having issues. – Michael Prokopec Nov 23 '18 at 18:28
  • Yeah it don't work. If one connect, it must stop other connects for 5 seconds. – user322517 Nov 23 '18 at 18:58
  • fyi. if you are adding these rules to another machine in front of your server. You should add it to FORWARD chain instead of INPUT. – ibrahim Dec 06 '18 at 09:49