Ubuntu: How To Free Up Port 53, Used By systemd-resolved | Linux Today
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Ubuntu: How To Free Up Port 53, Used By systemd-resolved

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Anonymous
Jul 6, 2020

Ubuntu has systemd-resolved listening on port 53 by default. In case you want to run your own DNS server, you can’t because port 53 is already in use, so you’ll get an error similar to this: “listen tcp 0.0.0.0:53: bind: address already in use”. This article explains how to stop systemd-resolved from using port 53 on Ubuntu.
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Anonymous

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