> For the complete documentation index, see [llms.txt](https://docs.stackerhq.com/stacker-classic/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stackerhq.com/stacker-classic/customization/custom-domain/custom-domain-not-working.md).

# Custom Domain not working

If you have followed our guide on [setting up your custom domain](/stacker-classic/customization/custom-domain.md) but are still having problems. There are some troubleshooting tips below.

### Check your DNS is connected

You can use various sites to find out if your DNS configuration has made its way around the internet. For example:

[mxtoolbox.com](https://mxtoolbox.com/)

[dnschecker.org](http://dnschecker.org/)

If this is listed as not found, or it is not correct, you will need to go back to your DNS provider and set it up again and recheck.

### Adding custom domain to Stacker

When your domain is showing up correctly, you can enter this into Stacker.

1. Click Workspace Settings
2. Click General
3. Enter the domain into Custom workspace domain
4. **Do not** include `www`

![custom\_domain.gif](https://support.stackerhq.com/hc/article_attachments/15470413154195)