Quiet redirection from http to https on port 8080

[platan]

Ispconfig3
Apache
SSL on port 8080
Problem: Error 400: Bad Request - ... Hint: http://...:8080
when http access. Terrible!

A small trick will solve the problem.

In a file: /etc/httpd/conf/sites-available/ispconfig.vhost add error document line before </VirtualHost>:

  ...
  SSLCertificateKeyFile /usr/local/ispconfig/interface/ssl/ispserver.key
  ErrorDocument 400 "<script>document.location.href='https://example.com:8080/';</script><a href='https://example.com:8080/'>https://example.com:8080/</a>"
  
</VirtualHost>

Attention:

1. Hostname (example.com) must be hardcoded. %{HOST_NAME} or something does not work.
2. You must reenter ErrorDocument every time, You update Ispconfig3 system.

Enjoy