NethServer Version: 6.9 (rc1)
Module: web proxy
Version NethServer 6.9 rc1 became after the installation of all updates.
I did as instructed http://docs.nethserver.org/en/v6.8/web_proxy.html
1.Installed a certificate.
2.Enabled transparent ssl proxy
3.But there is no access to https.Only http sites are open.
4. If you enable a proxy proxy (without ssl) then all sites are opened, but I can not block https sites.