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 v18.104.22.168.
It immediately downloaded v22.214.171.124, so maybe it's fixed in this version anyway?
Wireshark showed the passive FTP failing with v126.96.36.199.
'via Blog this'