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Add warning for setting PORT environment variable #5018

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Jan 29, 2022
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Add warning for setting PORT environment variable #5018

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2 changes: 2 additions & 0 deletions docs/networking/port-management.md
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Expand Up @@ -15,6 +15,8 @@ In Dokku 0.5.0, port proxying was decoupled from the `nginx-vhosts` plugin into
## Usage

> Warning: Mapping alternative ports may conflict with the active firewall installed on your server or hosting provider. Such software includes - but is not limited to - AWS Security Groups, iptables, and UFW. Please consult the documentation for those softwares as applicable.
>
> Users should also avoid setting the `PORT` environment variable. Dokku will use port mappings to set this value. Overridng this manually may cause issues in application routing.

> New as of 0.6.0

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