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Merge pull request #2108 from Kovah/iptables-notice 

Add notice about port binding and overriding of UFW to docker run reference
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Sebastiaan van Stijn 2020-01-28 12:48:04 +01:00 committed by GitHub
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docs/reference/commandline/run.md
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@ -352,6 +352,11 @@ machine. You can also specify `udp` and `sctp` ports.
The [Docker User Guide](https://docs.docker.com/engine/userguide/networking/default_network/dockerlinks/) The [Docker User Guide](https://docs.docker.com/engine/userguide/networking/default_network/dockerlinks/)
explains in detail how to manipulate ports in Docker. explains in detail how to manipulate ports in Docker.
Note that ports which are not bound to the host (i.e., `-p 80:80` instead of
`-p 127.0.0.1:80:80`) will be accessible from the outside. This also applies if
you configured UFW to block this specific port, as Docker manages his
own iptables rules. [Read more](https://docs.docker.com/network/iptables/)
```bash ```bash
$ docker run --expose 80 ubuntu bash $ docker run --expose 80 ubuntu bash
``` ```