Extending SSL services to subdomain

Answer 1

This is not an answer to your real question, but some infos ("Can some body help me with some ideas that matches to this problem.")how to get more than 1 domain onto 1 server: There are two ways:

1. Use "*.example.com" as certificates server name, so you can use any subdomain you need
2. You can use SNI (Server Name Indication) which is avalable in most current apache and OpenSSL releases, however, you may need to update your webserver. And it is not compatible with InternetExplorer on XP or earlier(IE will show a warning saying server name mismatch)

Answer 2

you need to get a wildcard ssl certificate, more info here

Answer 3

Instead of a wildcard certificate, you can use another separate certificate for myTools.example.com but you have to have a separate IP address for each certificate (unless you're using SNI which isn't fully supported)

A better option is to use a UC/SAN certificate that can secure multiple subdomains and separate domains in one certificate.