Domains ​
You can easily add your own domains to Coolify or your resources.
All domain fields are capable to generate your proxy configurations based on the following rules:
- You need to use FQDN (Fully Qualified Domain Name) format:
https://coolify.io - You can give multiple domains, separated by comma:
https://coolify.io,https://www.coolify.io - You can also add a port to the domain, so the proxy will know which port you would like to map to the domain:
https://coolify.io:8080,http://api.coolify.io:3000
HTTPS & SSL Certificates ​
Coolify automatically handles SSL/TLS certificates for your applications. When you enter a domain with the https:// protocol, everything is configured for you behind the scenes.
How Automatic HTTPS Works ​
When you enter a domain using the https:// protocol (for example, https://example.com):
Automatic Proxy Configuration - Coolify automatically applies the necessary configuration to your reverse proxy (Traefik or Caddy) to serve your application over HTTPS.
Certificate Issuance - The proxy automatically starts the process to request and install SSL certificates from Let's Encrypt.
Automatic Renewal - Certificates are automatically renewed before they expire. Let's Encrypt certificates are valid for 90 days and Coolify handles renewals seamlessly.
TIP
You don't need to do anything special to enable HTTPS. Simply use https:// when entering your domain, and Coolify takes care of the rest.
Self-Signed Certificates ​
If automatic certificate issuance from Let's Encrypt fails, the Coolify Proxy will provide a self-signed certificate to keep your application accessible. This means your application will still be reachable, but browsers will show a security warning.
TROUBLESHOOTING
If you see a certificate warning in your browser or your application shows a self-signed certificate, see the Let's Encrypt Not Working troubleshooting guide for detailed solutions.
Catch Multiple Domains ​
Multitenancy is supported with Coolify. When using Traefik, you can automatically catch multiple domains, by editing the Container Labels of your Application or Service and define a HostRegexp rule.
Catch-All & SSL Certificates
The Coolify Proxy won't be able to issue SSL certificates for catch-all domains. For subdomains of a specific domain, you have the option to generate a Wildcard SSL certificate.
Wildcard Domain ​
You can set a wildcard domain (example: http://example.com) to your server, so you can easily assign generated domains to all the resources connected to this server. More details
DNS Validation ​
Since version beta.191, Coolify will validates DNS records for your domains with 1.1.1.1 Cloudflare DNS server.
If you want to use different DNS server, go to your Settings > Advanced page and change the Custom DNS Servers field (comma separated list).