# How to Block Cloudflare
## with DNS

This page show you how to block CloudFlare websites with localhost DNS server.


### With DNSMasq (Type 1)

<details><summary> _click me_ </summary>

1. Install `dnsmasq`.
2. Open configuration file of dnsmasq.
3. Add those lines to your config file and restart dnsmasq.
4. Try `dig www.emsisoft.com`

```
bogus-nxdomain=103.21.244.0/22
bogus-nxdomain=103.22.200.0/22
bogus-nxdomain=103.31.4.0/22
bogus-nxdomain=104.16.0.0/13
bogus-nxdomain=104.24.0.0/14
bogus-nxdomain=108.162.192.0/18
bogus-nxdomain=131.0.72.0/22
bogus-nxdomain=141.101.64.0/18
bogus-nxdomain=162.158.0.0/15
bogus-nxdomain=172.64.0.0/13
bogus-nxdomain=173.245.48.0/20
bogus-nxdomain=188.114.96.0/20
bogus-nxdomain=190.93.240.0/20
bogus-nxdomain=197.234.240.0/22
bogus-nxdomain=198.41.128.0/17
bogus-nxdomain=2400:cb00::/32
bogus-nxdomain=2405:8100::/32
bogus-nxdomain=2405:b500::/32
bogus-nxdomain=2606:4700::/32
bogus-nxdomain=2803:f800::/32
bogus-nxdomain=2a06:98c0::/29
bogus-nxdomain=2c0f:f248::/32
```

</details>

### With DNSMasq (Type 2)

<details><summary> _click me_ </summary>

In step 3, add those lines and restart dnsmasq.

```
stop-dns-rebind
alias=104.16.0.0-104.23.255.255,127.0.0.0,255.255.255.0
alias=104.24.0.0-104.27.255.255,127.0.0.0,255.255.255.0
```

</details>

### With PowerDNS, dnsdist

<details><summary> _click me_ </summary>

```
badips = newNMG()
badips:addMask("103.21.244.0/22")
badips:addMask("103.22.200.0/22")
badips:addMask("103.31.4.0/22")
badips:addMask("104.16.0.0/13")
badips:addMask("104.24.0.0/14")
badips:addMask("108.162.192.0/18")
badips:addMask("131.0.72.0/22")
badips:addMask("141.101.64.0/18")
badips:addMask("162.158.0.0/15")
badips:addMask("172.64.0.0/13")
badips:addMask("173.245.48.0/20")
badips:addMask("188.114.96.0/20")
badips:addMask("190.93.240.0/20")
badips:addMask("197.234.240.0/22")
badips:addMask("198.41.128.0/17")
badips:addMask("2400:cb00::/32")
badips:addMask("2405:8100::/32")
badips:addMask("2405:b500::/32")
badips:addMask("2606:4700::/32")
badips:addMask("2803:f800::/32")
badips:addMask("2a06:98c0::/29")
badips:addMask("2c0f:f248::/32")

function ipfilter(rem, loc, dh)
    return badips:match(rem) or dh:getAD()
end
```

</details>

### With BIND

<details><summary> _click me_ </summary>

```
deny-answer-addresses {
103.21.244.0/22;
103.22.200.0/22;
103.31.4.0/22;
104.16.0.0/13;
104.24.0.0/14;
108.162.192.0/18;
131.0.72.0/22;
141.101.64.0/18;
162.158.0.0/15;
172.64.0.0/13;
173.245.48.0/20;
188.114.96.0/20;
190.93.240.0/20;
197.234.240.0/22;
198.41.128.0/17;
2400:cb00::/32;
2405:8100::/32;
2405:b500::/32;
2606:4700::/32;
2803:f800::/32;
2a06:98c0::/29;
2c0f:f248::/32;
} except-from { "localhost.invalid"; };
deny-answer-aliases { "localhost.invalid"; };
```

</details>

### With dnscrypt-proxy

<details><summary> _click me_ </summary>

```
[blocked_ips]
blocked_ips_file = 'blocked-ips.txt'
[blocked_names]
blocked_names_file = 'blocked-names.txt'
```

- Download [cloudflare_owned_domains.txt](../../cloudflare_inc/cloudflare_owned_domains.txt) and save it as `blocked-names.txt`.

- Add them to your `blocked-ips.txt`.
  - Or download [full pieces.txt](../../cloudflare_inc/cloudflare_CIDR_v4_pieces.txt) for absolute protection.

```
103.21.244.*
103.21.245.*
103.21.246.*
103.21.247.*
103.22.200.*
103.22.201.*
103.22.202.*
103.22.203.*
103.31.4.*
103.31.5.*
103.31.6.*
103.31.7.*
104.16.*
104.17.*
104.18.*
104.19.*
104.20.*
104.21.*
104.22.*
104.23.*
104.24.*
104.25.*
104.26.*
104.27.*
108.162.192.*
108.162.193.*
108.162.194.*
108.162.195.*
108.162.196.*
108.162.197.*
108.162.198.*
108.162.199.*
108.162.200.*
108.162.201.*
108.162.202.*
108.162.203.*
108.162.204.*
108.162.205.*
108.162.206.*
108.162.207.*
108.162.208.*
108.162.209.*
108.162.210.*
108.162.211.*
108.162.212.*
108.162.213.*
108.162.214.*
108.162.215.*
108.162.216.*
108.162.217.*
108.162.218.*
108.162.219.*
108.162.220.*
108.162.221.*
108.162.222.*
108.162.223.*
108.162.224.*
108.162.225.*
108.162.226.*
108.162.227.*
108.162.228.*
108.162.229.*
108.162.230.*
108.162.231.*
108.162.232.*
108.162.233.*
108.162.234.*
108.162.235.*
108.162.236.*
108.162.237.*
108.162.238.*
108.162.239.*
108.162.240.*
108.162.241.*
108.162.242.*
108.162.243.*
108.162.244.*
108.162.245.*
108.162.246.*
108.162.247.*
108.162.248.*
108.162.249.*
108.162.250.*
108.162.251.*
108.162.252.*
108.162.253.*
108.162.254.*
108.162.255.*
131.0.72.*
131.0.73.*
131.0.74.*
131.0.75.*
141.101.100.*
141.101.101.*
141.101.102.*
141.101.103.*
141.101.104.*
141.101.105.*
141.101.106.*
141.101.107.*
141.101.108.*
141.101.109.*
141.101.110.*
141.101.111.*
141.101.112.*
141.101.113.*
141.101.114.*
141.101.115.*
141.101.116.*
141.101.117.*
141.101.118.*
141.101.119.*
141.101.120.*
141.101.121.*
141.101.122.*
141.101.123.*
141.101.124.*
141.101.125.*
141.101.126.*
141.101.127.*
141.101.64.*
141.101.65.*
141.101.66.*
141.101.67.*
141.101.68.*
141.101.69.*
141.101.70.*
141.101.71.*
141.101.72.*
141.101.73.*
141.101.74.*
141.101.75.*
141.101.76.*
141.101.77.*
141.101.78.*
141.101.79.*
141.101.80.*
141.101.81.*
141.101.82.*
141.101.83.*
141.101.84.*
141.101.85.*
141.101.86.*
141.101.87.*
141.101.88.*
141.101.89.*
141.101.90.*
141.101.91.*
141.101.92.*
141.101.93.*
141.101.94.*
141.101.95.*
141.101.96.*
141.101.97.*
141.101.98.*
141.101.99.*
162.158.*
162.159.*
172.64.*
172.65.*
172.66.*
172.67.*
172.68.*
172.69.*
172.70.*
172.71.*
173.245.48.*
173.245.49.*
173.245.50.*
173.245.51.*
173.245.52.*
173.245.53.*
173.245.54.*
173.245.55.*
173.245.56.*
173.245.57.*
173.245.58.*
173.245.59.*
173.245.60.*
173.245.61.*
173.245.62.*
173.245.63.*
188.114.100.*
188.114.101.*
188.114.102.*
188.114.103.*
188.114.104.*
188.114.105.*
188.114.106.*
188.114.107.*
188.114.108.*
188.114.109.*
188.114.110.*
188.114.111.*
188.114.96.*
188.114.97.*
188.114.98.*
188.114.99.*
190.93.240.*
190.93.241.*
190.93.242.*
190.93.243.*
190.93.244.*
190.93.245.*
190.93.246.*
190.93.247.*
190.93.248.*
190.93.249.*
190.93.250.*
190.93.251.*
190.93.252.*
190.93.253.*
190.93.254.*
190.93.255.*
197.234.240.*
197.234.241.*
197.234.242.*
197.234.243.*
198.41.128.*
198.41.129.*
198.41.130.*
198.41.131.*
198.41.132.*
198.41.133.*
198.41.134.*
198.41.135.*
198.41.136.*
198.41.137.*
198.41.138.*
198.41.139.*
198.41.140.*
198.41.141.*
198.41.142.*
198.41.143.*
198.41.144.*
198.41.145.*
198.41.146.*
198.41.147.*
198.41.148.*
198.41.149.*
198.41.150.*
198.41.151.*
198.41.152.*
198.41.153.*
198.41.154.*
198.41.155.*
198.41.156.*
198.41.157.*
198.41.158.*
198.41.159.*
198.41.160.*
198.41.161.*
198.41.162.*
198.41.163.*
198.41.164.*
198.41.165.*
198.41.166.*
198.41.167.*
198.41.168.*
198.41.169.*
198.41.170.*
198.41.171.*
198.41.172.*
198.41.173.*
198.41.174.*
198.41.175.*
198.41.176.*
198.41.177.*
198.41.178.*
198.41.179.*
198.41.180.*
198.41.181.*
198.41.182.*
198.41.183.*
198.41.184.*
198.41.185.*
198.41.186.*
198.41.187.*
198.41.188.*
198.41.189.*
198.41.190.*
198.41.191.*
198.41.192.*
198.41.193.*
198.41.194.*
198.41.195.*
198.41.196.*
198.41.197.*
198.41.198.*
198.41.199.*
198.41.200.*
198.41.201.*
198.41.202.*
198.41.203.*
198.41.204.*
198.41.205.*
198.41.206.*
198.41.207.*
198.41.208.*
198.41.209.*
198.41.210.*
198.41.211.*
198.41.212.*
198.41.213.*
198.41.214.*
198.41.215.*
198.41.216.*
198.41.217.*
198.41.218.*
198.41.219.*
198.41.220.*
198.41.221.*
198.41.222.*
198.41.223.*
198.41.224.*
198.41.225.*
198.41.226.*
198.41.227.*
198.41.228.*
198.41.229.*
198.41.230.*
198.41.231.*
198.41.232.*
198.41.233.*
198.41.234.*
198.41.235.*
198.41.236.*
198.41.237.*
198.41.238.*
198.41.239.*
198.41.240.*
198.41.241.*
198.41.242.*
198.41.243.*
198.41.244.*
198.41.245.*
198.41.246.*
198.41.247.*
198.41.248.*
198.41.249.*
198.41.250.*
198.41.251.*
198.41.252.*
198.41.253.*
198.41.254.*
198.41.255.*
```

</details>