📄️403 Error Troubleshooting Guide

This guide covers the most common causes of 403 Forbidden errors on a website and how to resolve them.

📄️502 Error Troubleshooting Guide

This guide explains the most common causes of 502 Bad Gateway errors and how to fix them.

📄️Use Cloudflare with OpenPanel

How to use Cloudflare with OpenPanel: DNS records, Full (strict) SSL mode, Cloudflare Origin Certificates, fixing ERR_TOO_MANY_REDIRECTS and 526 errors, email records and showing real visitor IPs.

📄️Domain Shows Default Page

When you add a domain to OpenPanel, it will initially display the following message:

📄️504 Error Troubleshooting Guide

This guide explains the most common causes of 504 Gateway Timeout errors and how to fix them.

📄️Adding Additional Hosts to SPF Records

To include a specific host in SPF records across all domains, follow the instructions below.

📄️Configure Nameservers

Before adding any domains, it is important to first create nameservers to ensure valid DNS zone files and proper propagation.

📄️How to Enable HSTS on a Domain in OpenPanel

HSTS (HTTP Strict Transport Security) can be enabled either globally for all domains or individually for specific domains in OpenPanel.

📄️DNS Clustering

DNS clustering enables you to synchronize DNS records across multiple OpenPanel servers, providing redundancy and scalability for your DNS infrastructure.

📄️Install a Custom / Paid SSL Certificate

How to install a custom or paid SSL certificate (Sectigo, DigiCert, GoDaddy, wildcard, OV or EV) on a domain in OpenPanel, how to build the full chain, and how to switch back to free Let's Encrypt SSL.

📄️Let's Encrypt Rate Limits & Renewals

Why Let's Encrypt SSL certificates fail to issue or renew in OpenPanel: rate limits (too many certificates, failed validations), DNS and firewall problems, CAA records and Cloudflare - and how to fix each one.

📄️404 Error Troubleshooting Guide

This guide explains the most common causes of 404 Not Found errors on a website and how to resolve them.

📄️Redirects: HTTPS, www, Domain

How to redirect HTTP to HTTPS, www to non-www (or the reverse), and one domain to another in OpenPanel, including keeping the URL path and choosing 301 vs 302 redirects.

📄️Speed up DNS propagation

DNS propagation cannot be speed up.

📄️SSL Validation Failure

Issue

📄️Subdomains, Addon & Parked Domains

How to add a subdomain, an addon domain or a parked (alias) domain in OpenPanel. All domains are equal - each can have its own website, SSL and DNS, or share a site with another domain.

📄️Troubleshooting DNS

Make sure the DNS-server on the host server responds to requests for the domain zone:

📄️Wildcard SSL Certificates

Does OpenPanel support wildcard SSL certificates (*.example.com)? No - but every domain and subdomain gets its own free Let's Encrypt certificate automatically. Here's how that works and what to use instead.