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Clarification & expansion of port forwarding (#4731) 

It seems like another sentence or two of explanation about the `-p` option and its syntax might be helpful, here...
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Steven Bedrick 2017-10-10 14:06:23 -07:00 committed by Misty Stanley-Jones
parent ec87a0ae60
commit c5ab70f51a
1 changed files with 7 additions and 1 deletions
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8
docker-for-mac/networking.md
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@ -22,7 +22,13 @@ When you run a container with the `-p` argument, for example:
```
$ docker run -p 80:80 -d nginx
```
Docker for Mac will make the container port available at `localhost`.
Docker for Mac will make whatever is running on port 80 in the container (in this case, `nginx`) available on port 80 of `localhost`. In this example, the host and container ports are the same. What if you need to specify a different host port? If, for example, you already have something running on port 80 of your host machine, you can connect the container to a different port:
```
$ docker run -p 8081:80 -d nginx
```
Now, connections to `localhost:8081` will be sent to port 80 in the container. The syntax for `-p` is `HOST_PORT:CLIENT_PORT`.
### HTTP/HTTPS Proxy Support