I have a SSL-only website hosted on a CentOS 7, Apache httpd based server. SSL certification is via a Let's Encrypt
certificate. The domain has a HTTP Strict Transport Security (HSTS) policy.
I am also running Apache Solr (indexing; search) as a backend server, secured with a self-signed SSL certificate. However, all web browsers reject the self-signed certificate:
`The certificate is not trusted because it is self-signed. ... Accept the risk and continue. ...'
I need to manually add a security exemption / bypass in the browser, before I am able to login to the Solr Admin UI (on the Solr port).