NetMan and HAN allow to create a certificate request or self-signed certificates over the corresponding control in the Control Panel. However these requests have a fix length a 1024 Bit only.
A certificate request with 2048 Bit (or more) have to be created manually with Netman up to version 4.5.x and HAN 2.3.2. Please load the following ZIP file: myssl.zip
Unzip the arcive within a new subfolder myssl in ..\WebSrv\ssl
The file server_req.cfg allows to define the FQDN of the server etc. (all entries ending with ..._default).