Chặn các IP có lượng truy cập lớn từ Trung Quốc

Để ngăn chặn lượng truy cập lớn từ các IP & các search engine của Trung Quốc, nhất là BaiduSpider, bạn tạo file .htaccess trong folder public_html với nội dung như sau (nếu đã có sẵn file .htaccess chỉ cần chèn dưới cùng của file), sau đó lưu lại:

RewriteCond %{HTTP_USER_AGENT} ^Baiduspider [NC]
RewriteRule .* - [F]

<Limit GET HEAD POST>
order allow,deny
deny from baidu.com
deny from crawl.baidu.com
deny from 220.181.7.
deny from 123.125.66.
deny from baiduspider-220-181-7-20.crawl.baidu.com
deny from baiduspider-220-181-7-61.crawl.baidu.com
deny from 58.14.0.0/15
deny from 58.16.0.0/16
deny from 58.17.0.0/17
deny from 58.17.128.0/17
deny from 58.18.0.0/16
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deny from 58.48.0.0/13
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deny from 58.59.128.0/17
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deny from 58.82.0.0/15
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deny from 61.55.0.0/16
deny from 61.87.192.0/18
deny from 61.128.0.0/15
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deny from 61.133.128.0/17
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deny from 61.134.96.0/19
deny from 61.134.128.0/18
deny from 61.134.192.0/18
deny from 61.135.0.0/16
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deny from 61.138.192.0/18
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deny from 61.159.128.0/17
deny from 61.160.0.0/16
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deny from 61.180.128.0/17
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deny from 61.184.0.0/14
deny from 61.188.0.0/16
deny from 61.189.0.0/17
deny from 61.189.128.0/17
deny from 61.190.0.0/15
deny from 61.232.0.0/14
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deny from 61.240.0.0/14
deny from 116.1.0.0/16
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deny from 116.4.0.0/14
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deny from 116.13.0.0/16
deny from 116.16.0.0/12
deny from 116.52.0.0/14
deny from 116.56.0.0/15
deny from 116.58.128.0/20
deny from 116.58.208.0/20
deny from 116.60.0.0/14
deny from 116.66.0.0/17
deny from 116.69.0.0/16
deny from 116.70.0.0/17
deny from 116.76.0.0/15
deny from 116.78.0.0/15
deny from 116.89.144.0/20
deny from 116.90.184.0/21
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deny from 116.112.0.0/14
deny from 116.116.0.0/15
deny from 116.128.0.0/10
deny from 116.192.0.0/16
deny from 116.193.16.0/20
deny from 116.193.32.0/19
deny from 116.194.0.0/15
deny from 116.196.0.0/16
deny from 116.198.0.0/16
deny from 116.199.0.0/17
deny from 116.199.128.0/19
deny from 116.204.0.0/15
deny from 116.207.0.0/16
deny from 116.208.0.0/14
deny from 116.212.160.0/20
deny from 116.213.64.0/18
deny from 116.213.128.0/17
deny from 116.214.32.0/19
deny from 116.214.64.0/20
deny from 116.214.128.0/17
deny from 116.215.0.0/16
deny from 116.216.0.0/14
deny from 116.224.0.0/12
deny from 116.242.0.0/15
deny from 116.244.0.0/15
deny from 116.246.0.0/15
deny from 116.248.0.0/15
deny from 116.252.0.0/15
deny from 116.254.128.0/17
deny from 116.255.128.0/17
deny from 117.8.0.0/13
deny from 117.21.0.0/16
deny from 117.22.0.0/15
deny from 117.24.0.0/13
deny from 117.32.0.0/13
deny from 117.40.0.0/14
deny from 117.44.0.0/15
deny from 117.48.0.0/14
deny from 117.53.48.0/20
deny from 117.53.176.0/20
deny from 121.0.16.0/20
deny from 121.4.0.0/15
deny from 121.8.0.0/13
deny from 121.16.0.0/13
deny from 121.24.0.0/14
deny from 121.28.0.0/15
deny from 121.30.0.0/16
deny from 121.31.0.0/16
deny from 121.32.0.0/14
deny from 121.36.0.0/16
deny from 121.37.0.0/16
deny from 121.38.0.0/15
deny from 121.40.0.0/14
deny from 121.46.0.0/16
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deny from 121.51.0.0/16
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deny from 121.59.0.0/16
deny from 121.60.0.0/14
deny from 121.68.0.0/14
deny from 121.76.0.0/15
deny from 121.89.0.0/16
deny from 121.100.128.0/17
deny from 121.192.0.0/16
deny from 121.193.0.0/16
deny from 121.194.0.0/15
deny from 121.201.0.0/16
deny from 121.204.0.0/14
deny from 121.224.0.0/12
deny from 121.248.0.0/14
deny from 121.255.0.0/16
deny from 122.0.64.0/18
deny from 122.0.128.0/17
deny from 122.4.0.0/14
deny from 122.8.0.0/13
deny from 122.48.0.0/16
deny from 122.49.0.0/18
deny from 122.51.0.0/16
deny from 122.64.0.0/11
deny from 122.96.0.0/15
deny from 122.102.0.0/20
deny from 122.102.64.0/20
deny from 122.102.80.0/20
deny from 122.136.0.0/13
deny from 122.144.128.0/17
deny from 122.152.192.0/18
deny from 122.156.0.0/14
deny from 122.192.0.0/14
deny from 122.198.0.0/16
deny from 122.200.64.0/18
deny from 122.204.0.0/14
deny from 122.224.0.0/12
deny from 122.240.0.0/13
deny from 122.248.48.0/20
deny from 123.0.128.0/18
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deny from 123.49.128.0/17
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deny from 123.56.0.0/13
deny from 123.64.0.0/11
deny from 123.96.0.0/15
deny from 123.98.0.0/17
deny from 123.99.128.0/17
deny from 123.100.0.0/19
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deny from 123.108.128.0/20
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deny from 124.6.64.0/18
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deny from 124.21.64.0/18
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deny from 222.168.0.0/15
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deny from 222.192.0.0/14
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deny from 222.249.176.0/20
deny from 222.249.192.0/18
deny from 121.0.*.*
deny from 121.4.*.*
deny from 121.5.*.*
deny from 121.8.*.*
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deny from 121.14.*.*
deny from 121.15.*.*
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deny from 121.27.*.*
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deny from 121.33.*.*
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deny from 116.204.*.*
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deny from 116.210.*.*
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deny from 116.215.*.*
deny from 116.216.*.*
deny from 116.224.*.*
deny from 116.225.*.*
deny from 116.226.*.*
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deny from 116.228.*.*
deny from 116.229.*.*
deny from 116.230.*.*
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deny from 116.233.*.*
deny from 116.234.*.*
deny from 116.235.*.*
deny from 116.236.*.*
deny from 116.237.*.*
deny from 116.238.*.*
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deny from 116.242.*.*
deny from 116.243.*.*
deny from 116.244.*.*
deny from 116.245.*.*
deny from 116.246.*.*
deny from 116.247.*.*
deny from 116.248.*.*
deny from 116.249.*.*
deny from 116.252.*.*
deny from 116.253.*.*
allow from all
</LIMIT>

Để biết IP nào hay SPAM, bạn vào web https://cleantalk.org/ check IP đó sẽ ra. Nếu IP đó cảnh bảo là chuyển SPAM thì bạn chặn hết là được.

Trường hợp tấn công DDOS mà hacker dùng IP từ nhiều nước khác nhau thì bạn có thể chặn tất cả IP từ các quốc gia khác. Chỉ cho phép truy cập từ các IP của Việt Nam. Bổ sung đoạn mã bên dưới vào file .htaccess

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allow from 120.50.184.0/21
allow from 120.72.80.0/21
allow from 120.72.96.0/19
allow from 120.138.64.0/20
allow from 121.50.172.0/22
allow from 122.102.112.0/22
allow from 122.129.0.0/18
allow from 122.201.8.0/21
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allow from 124.157.0.0/18
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allow from 137.59.24.0/21
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allow from 137.59.104.0/22
allow from 137.59.116.0/22
allow from 144.48.20.0/22
allow from 144.48.24.0/22
allow from 146.196.64.0/22
allow from 150.95.16.0/22
allow from 150.95.104.0/21
allow from 150.95.112.0/20
allow from 157.119.244.0/22
allow from 157.119.248.0/22
allow from 163.44.192.0/22
allow from 163.44.200.0/24
allow from 163.44.204.0/22
allow from 171.224.0.0/11
allow from 175.103.64.0/18
allow from 175.106.0.0/22
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allow from 180.148.0.0/21
allow from 180.148.128.0/20
allow from 180.214.236.0/22
allow from 182.161.80.0/20
allow from 182.236.112.0/22
allow from 182.237.20.0/22
allow from 183.81.0.0/17
allow from 183.80.0.0/16
allow from 183.90.160.0/21
allow from 183.91.0.0/19
allow from 183.91.160.0/19
allow from 202.0.79.0/24
allow from 202.4.168.0/24
allow from 202.4.176.0/24
allow from 202.6.2.0/24
allow from 202.6.96.0/23
allow from 202.9.79.0/24
allow from 202.9.80.0/24
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allow from 202.37.86.0/23
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allow from 202.44.137.0/24
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allow from 202.55.132.0/22
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allow from 202.59.238.0/23
allow from 202.59.252.0/23
allow from 202.60.104.0/21
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allow from 202.78.224.0/21
allow from 202.79.232.0/21
allow from 202.87.212.0/22
allow from 202.92.4.0/22
# Listed and share by BienThuy.Com
allow from 202.93.156.0/22
allow from 202.94.82.0/24
allow from 202.94.88.0/23
allow from 202.124.204.0/24
allow from 202.130.36.0/23
allow from 202.134.16.0/21
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allow from 202.143.108.0/22
allow from 202.151.160.0/20
allow from 202.158.244.0/22
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allow from 202.172.4.0/23
allow from 202.191.56.0/22
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allow from 203.34.144.0/24
allow from 203.77.178.0/24
allow from 203.79.28.0/24
allow from 203.89.140.0/22
allow from 203.99.248.0/22
allow from 203.113.128.0/18
allow from 203.119.8.0/22
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allow from 203.119.44.0/22
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allow from 203.128.240.0/21
allow from 203.160.0.0/23
allow from 203.160.96.0/21
allow from 203.160.132.0/22
allow from 203.161.178.0/24
allow from 203.162.0.0/16
allow from 203.163.128.0/18
allow from 203.167.8.0/21
allow from 203.170.26.0/23
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allow from 203.176.160.0/21
allow from 203.189.28.0/22
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allow from 203.191.8.0/21
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allow from 203.195.0.0/18
allow from 203.196.24.0/22
allow from 203.201.56.0/22
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allow from 203.209.180.0/22
allow from 203.210.128.0/17
allow from 210.2.64.0/18
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allow from 210.211.96.0/19
allow from 210.245.0.0/17
allow from 218.100.10.0/24
allow from 218.100.14.0/24
allow from 218.100.60.0/24
allow from 220.231.64.0/18
allow from 221.121.0.0/18
allow from 221.132.0.0/18
allow from 221.133.0.0/19
allow from 222.252.0.0/14
allow from 223.27.104.0/21
# Deny all other IP not in the list
deny from all