Troubleshooting
What to check when the panel stops answering, a site shows 503, form posts arrive empty, mail is not delivered, Let's Encrypt fails or an update does not install.
Panel not reachable after a firewall changeThe StackRegent panel stopped answering right after you changed firewall, IP restriction or port settings. How to get back in from the server console.
Website shows 503 Service UnavailableA site on the server answers every request with HTTP 503 Service Unavailable. The usual causes in order, from a suspended subscription to a crashing application pool.
ASP.NET form posts arrive empty with the WAF installedASP.NET logins and forms received empty fields on servers with the ModSecurity web application firewall. Fixed in 0.17.15; the WAF no longer reads request bodies.
Mail not delivered from or to the serverOutgoing mail stays in the queue or lands in spam, or incoming mail never arrives. The checks to run, in order, for MailEnable on StackRegent.
Let's Encrypt certificate fails to issue or renewThe Let's Encrypt task fails, leaves names out of the certificate, or a renewal notice arrives. What each message means and how to fix it.
A StackRegent update did not installThe Updates page offers no release, the install task fails, or the panel still shows the old version afterwards. Where to look and how to finish the update.