# Single File

**URL:** https://hub.mender.io/t/single-file/486
**Category:** Update Modules
**Created:** [April 16, 2019, 1:55pm UTC](https://hub.mender.io/t/single-file/486 "2019-04-16T13:55:59Z")
**Posts on this page:** 1
**Showing post:** 21

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### Author: ![mirzak](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/mirzak/32/2056_2.png) [@mirzak](https://hub.mender.io/u/mirzak)
#### Post date: [March 25, 2020, 7:50am UTC](https://hub.mender.io/t/single-file/486/21 "2020-03-25T07:50:46Z")

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> [@gerardostola](#):
>
> Now we could download a single file successfully, using the demo server. By the way, it can only send the domain [s3.docker.mender.io](http://s3.docker.mender.io), we could not change it and that could be nice, given that clients and servers live on different networks. The only workaround we found was to resolve that domain through the client´s /etc/hosts file, which is somewhat dirty.

This is a limitation of the Demo environment, as we provide demo certificates for the [docker.mender.io](http://docker.mender.io) and [s3.docker.mender.io](http://s3.docker.mender.io) domains.

If you want to use a custom domain name you can setup a production environment, [Production installation | Mender documentation](https://docs.mender.io/2.3/administration/production-installation)

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