Custom domain + Let's Encrypt

Serve your site from your own clearnet hostname. Available on Pro and Business.

Status: skeleton

Full content lands in a follow-up pass.

Steps

1. In the portal: Sites → your site → Delivery tab → Add custom domain
2. Enter the hostname (e.g. cdn.example.com)
3. We display a CNAME target. Add it at your DNS provider:

   cdn.example.com  CNAME  <your-slug>.viaductcdn.com
   

4. Wait for DNS propagation (typically 60s; up to your TTL otherwise)
5. We issue and bind a Let's Encrypt cert automatically
6. Renewal happens automatically every 60 days

Caveats

• DNS must use CNAME (not A/AAAA). Apex domains require ALIAS/ANAME records at your DNS provider, or move the apex to us via an ALIAS-equivalent.
• You can host multiple custom domains on one site.
• Removing a custom domain is instant; the cert is revoked.