NOTE: We recommend every Nucleus user setup their custom domain WITH SSL certificate support. This will allow for maximum security and a smoother user experience for your Nucleus. To follow the setup process for your Nucleus custom domain with a FREE SSL certificate - click here.

Setting up your Nucleus custom domain is a straightforward process. If you run into trouble though, don't hesitate to contact support at!

Step 1: Domain DNS Settings

The first step to configuring your custom domain, is to point your domain to the Nucleus IP using your domain's DNS settings.

Basically, this tells your domain registrar (the company you bought your domain from) that you want your domain to point to your Nucleus.

To do this, add an "A entry/record" to your domain with the following settings:

  • Host name = @
  • IP address (value) =
  • TTL (time to launch) = as low as possible i.e. 600 seconds, 1m, etc.

Once you've added an A entry/record to your custom domain using the values listed above, make sure to save the changes!

NOTE: To ensure that your domains DNS settings have been properly configured, visit the website From here, enter your domain in the field provided and select 'A' from the dropdown menu to signify 'A record'. Click the search button and will identify where your domain is currently pointed. You'll know your domain is correctly pointed at Nucleus if the values appear as (see screenshot below for example).

Step 2: Domain Nucleus Settings

After completing Step 1, your custom domain (ie. will be pointing at Nucleus. But this is just a one-way relationship at this point. 

Now, it's time to let Nucleus know which domain it should use to serve your Nucleus to the world.

To begin, navigate to your Nucleus Settings page while logged in to your Nucleus account. Hover your mouse over the Settings button and then select 'Nucleus Settings'

From here, find the heading that reads 'Custom Domain'. This is the field you must use to hook-up your custom domain to your Nucleus.

Simply enter your domain name (WITHOUT "www." or "http://" at the beginning - Example:

Once you've added your custom domain to the field provided, scroll to the bottom of your 'Nucleus Settings' page, and click the 'Update Settings' button to commit and save the changes to your Nucleus.

NOTE: Even once you've setup everything properly with your Nucleus custom domain, your new domain won't appear instantly. Domain propagation can take up to 24 hours. Make sure to check with to ensure your domain is properly pointed at Nucleus (see more instructions on how to do this in Step 1).

Of course, if your domain is correctly pointed at Nucleus, your Nucleus settings are properly configured, and you're still not seeing your custom domain working as it should, contact support at and we'll make sure to get it set up for you!

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