Re: FAQ(16): Using HTTP protocol in SDM - HP Enterprise Business Community:
This post explains how to force the use of HTTP with HP SoftPaq Download Manager (SDM) instead of the default passive FTP.
Use the switch /FORCEHTTP.
This solved the errors I was getting with SDM saying it could not access ftp.hp.com with v184.108.40.206.
It immediately downloaded v220.127.116.11, so maybe it's fixed in this version anyway?
Wireshark showed the passive FTP failing with v18.104.22.168.
'via Blog this'