I already posted about that matter in 2008 for ISPConfig 2 here
Has that feature been incorporated in ISPConfig 3?
As I guess not, is the shown solution still valid for ISPConfig 3?
A SSL Proxy is must-have feature, because I want to pay only for one normal SSL certificate, and use that one on https://ssl.masterdomain.tld
, so that all other hosted sites can be accessed by https://ssl.masterdomain.tld/hosteddomain.tld/
, instead of having to pay for a wildcard cert or multiple individual certs.