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Cannot resolve dns in containers

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I am unable to resolve hostnames from within docker containers on my Raspberry Pi running Ubuntu 20.04. I have had this working previously with an old portable eddie client in debian 8, but not here.

When I have hummingbird running without dns, I am able to ping websites but this will not work from within the docker container.

Please help


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Maybe from inside your docker container the modification of system files is not allowed, it would sound correct under a security point of view. Changing system DNS is not a trivial operation and only a superuser can do it.

Kind regards

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