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 v220.127.116.11.
It immediately downloaded v18.104.22.168, so maybe it's fixed in this version anyway?
Wireshark showed the passive FTP failing with v22.214.171.124.
'via Blog this'