This I use in a file .htaccess
Code:
# compute-1.amazonaws.com #
Deny from 23.23.10.62
Deny from 23.20.
Deny from 23.22.
Deny from 35.156.
Deny from 35.157.
Deny from 35.158.
Deny from 35.160.161.231
Deny from 35.162.174.19
Deny from 35.163.83.33
Deny from 35.165.187.125
Deny from 35.166.
Deny from 35.167.
Deny from 46.137.98.159
Deny from 50.16.
Deny from 50.17.
Deny from 50.19.
Deny from 50.112.
Deny from 52.3.127.144
Deny from 52.10.44.67
Deny from 52.18.13.221
Deny from 52.20.100.201
Deny from 52.23.
Deny from 52.27.19.41
Deny from 52.28.
Deny from 52.29.194.141
Deny from 52.33.108.21
Deny from 52.37.156.71
Deny from 52.48.74.52
Deny from 52.57.
Deny from 52.58.
Deny from 52.59.166.170
Deny from 52.67.149.151
Deny from 52.91.
Deny from 52.207.224.143
Deny from 52.221.222.65
Deny from 54.22.67.76
Deny from 54.80.
Deny from 54.81.203.79
Deny from 54.82.
Deny from 54.83.
Deny from 54.85.11.157
Deny from 54.87.
Deny from 54.89.
Deny from 54.90.186.245
Deny from 54.92.150.95
Deny from 54.93.55.9
Deny from 54.145.254.249
Deny from 54.146.
Deny from 54.147.134.218
Deny from 54.152.162.237
Deny from 54.154.
Deny from 54.157.218.181
Deny from 54.158.
Deny from 54.159.111.114
Deny from 54.161.124.79
Deny from 54.163.
Deny from 54.165.
Deny from 54.166.
Deny from 54.167.219.248
Deny from 54.169.219.126
Deny from 54.172.
Deny from 54.173.172.60
Deny from 54.174.46.230
Deny from 54.175.
Deny from 54.189.154.220
Deny from 54.196.
Deny from 54.197.
Deny from 54.198.
Deny from 54.203.205.196
Deny from 54.204.165.156
Deny from 54.221.194.61
Deny from 54.205.
Deny from 54.208.63.4
Deny from 54.209.60.63
Deny from 54.211.
Deny from 54.224.4.183
Deny from 54.225.
Deny from 54.226.67.76
Deny from 54.227.
Deny from 54.229.59.37
Deny from 54.232.100.158
Deny from 54.234.
Deny from 54.235.132.136
Deny from 54.236.
Deny from 54.237.
Deny from 54.242.
Deny from 54.249.240.15
Deny from 54.252.97.95
Deny from 54.251.45.250
Deny from 67.202.63.69
Deny from 75.101.
Deny from 107.21.
Deny from 107.22.154.72
Deny from 107.23.45.196
Deny from 174.129.
Deny from 184.73.
Deny from 204.236.235.245
When I see some new IP, I put that in the file. I have many months to see them again.