What is linux equivalent of “host.docker.internal”

Question

On Mac and Windows it is possible to use docker.for.mac.host.internal (replaces docker.for.mac.localhost) and docker.for.win.host.int

Answer 1

Using the docker0 interface ip, say 172.17.0.1, could be a good workaround.

Just be sure that the service you need to reach listens to external connections. A typical example is Mysql who binds to 127.0.0.1 by default, resulting unreachable until you allow external connections (es. binding to 0.0.0.0)