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Last active June 2, 2023 09:12
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If port 53 is occupied...
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README.md

Context

If you want to host a DNS server in a Linux environment (e.g. Ubuntu or raspbian), port 53/udp might be occupied by one of the services below. Use. ss or lsof to check the running service.

Stop systemd-resolved

  1. Edit the conf file

    sudo vim /etc/systemd/resolved.conf

  2. Uncomment the line DNSStubListener and set the value to no, like so:

    DNSStubListener=no

  3. Restart the service, or reboot if you're lazy

    sudo service systemd-resolved restart

Stop dnsmasq

  1. Stop the service 
    sudo systemctl stop dnsmasq.service
  2. Disable autorun 
    sudo systemctl disable dnsmasq.service

Reference

🔗 https://discourse.pi-hole.net/t/update-what-to-do-if-port-53-is-already-in-use/52033

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