Protection against Slowloris?

I now recieved this too


 lfd on srv.salamzaban.ir: High 5 minute load average alert - 18.09
Time:                    Tue Jul 17 20:23:36 2018 +0430
1 Min Load Avg:          9.23
5 Min Load Avg:          18.09
15 Min Load Avg:         14.37
Running/Total Processes: 10/5839


http://send.bullten.net/download/46cb26199025968f1f35105782168827.html

I receieve such a thing exactly each hour.

But it does not use any more cpu or ram.

My ram is 4 now but it uses less than 2.

I had such a problem with CPU 4 and Ram 8 too. I can set to more cpus for a while. OK

On Cloadflare it shows there are a lot of attaks too. is it normal?

I really thank you

load goes high as the resource gets exhasuted. On htop result shows 100% cpu is already used.

It may be ddos but the logs you provided doesnt throw light on that.