My server attacked?

Hello,
my cpu load up to 586% and server crashed.
I run following command in ssh:

Code:

netstat -autpn | grep :80 | awk '{print $5}' | cut -d. -f1-4 | cut -d: -f1 | sort -n | uniq -c | sort -n

and i see:

Code:

   
      1 0.0.0.0
      1 208.64.230.220
      1 212.180.4.150
      1 217.219.185.164
      1 217.219.225.98
      1 217.219.230.74
      1 217.219.56.214
      1 38.99.13.121
      1 66.36.228.42
      1 72.30.177.83
      1 72.30.177.98
      1 72.55.133.154
      1 74.6.69.213
      1 77.237.171.219
      1 80.191.211.131
      1 82.115.25.193
      1 82.99.248.74
      1 84.11.72.57
      1 84.47.210.5
      1 84.47.210.6
      1 84.47.210.7
      1 84.47.210.8
      3 85.185.3.22
      3 91.98.25.37
      4 217.218.183.3
      4 82.99.195.14
      6 195.146.33.250
    106 208.53.138.2
    162 67.15.211.15
    190 62.68.207.138

IS MY SERVER DDOS ATTACKED?
How can resolve this problem. i block attacker ip but he back and start attack again by new ip address.
on my server mod_evasive and apf firewall installed.
Help me please.

 

Thank you.
i have two question:
1- how can disable apf?
2- how can remove apf?

 

Thank you.
If i install csf, how can disable csf and back to apf if need?