[Cloudflare] Configuring DoH Server on MikroTik RouterOS 7.8 (with certificates).txt

Encrypt your DNS requests with MikroTik (RouterOS 7.8 Stable)

(1) Quick command line setup for Cloudflare:

# Temporarily add a normal upstream DNS resolver
1. /ip dns set servers=1.1.1.1,1.0.0.1

# CA certificates extracted from DigiCert
2. /tool fetch https://cacerts.digicert.com/DigiCertGlobalRootCA.crt.pem

# Import CA to ca-store
3. /certificate import file-name=DigiCertGlobalRootCA.crt.pem passphrase=""

# Set the DoH resolver to cloudflare
4. /ip dns set use-doh-server=https://1.1.1.1/dns-query verify-doh-cert=yes allow-remote-requests=yes

# Remove the old upstream DNS resolvers
5. /ip dns set servers=""

Reminder: Uncheck "user-peer-dns" from dhcp-client (WAN) or pppoe-out1 (WAN)

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(2) Redirect DNS queries to router:

/ip firewall nat add chain=dstnat protocol=tcp dst-port=53 action=redirect to-ports=53
/ip firewall nat add chain=dstnat protocol=udp dst-port=53 action=redirect to-ports=53

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(3) Script for updating certificates

System > Scripts

Name: Update-Cert
Policy: ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon
Source:

/tool fetch https://cacerts.digicert.com/DigiCertGlobalRootCA.crt.pem
:delay 10s
/certificate import file-name=DigiCertGlobalRootCA.crt.pem passphrase=""

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(4) Scheduler for run "Update-Cert" in every 1 week

Name: Update-Cert
policy=ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon
Start Time: 00:00:00
Interval: 7d 00:00:00
On Event: /system script run Update-Cert

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