This tool provides a diagnostic page that appears when a website cannot be accessed from a server. It is for website owners, developers, and system administrators who need to troubleshoot why their site is not loading correctly for visitors.

• Domain Configuration Check: Explains if the issue is due to the domain name not being correctly associated with a site on the server, helping to identify missing DNS or hosting setup.
• SSL Certificate Detection: Alerts users when a site is accessed via HTTPS but lacks a valid SSL certificate, guiding them toward securing the connection.
• IPv4/IPv6 Protocol Mismatch: Highlights potential problems when a domain has an IPv6 (AAAA) record but the server only supports IPv4, preventing access for some users.
• Clear Problem Identification: Presents a concise, plain-language list of the most frequent technical causes, saving time on initial diagnostics.
• Action-Oriented Guidance: Each listed issue points toward a specific area for the user to investigate, facilitating a faster resolution path.