Kak naschet proxy? Esli podklucheni po FQDN, to mozhno napravit' na proxy host, kotorij perenapravit na vnutrennij IP address.
VCloud Director console tak i rabotaet, na etom zhe principe. HAproxy - open-source, vpolne podojdet, kak varianet.
Nu, ili VPN, kak uzhe collegi posovetovali- vse edino, lish' bi ot vSphere client do Host bilo pryamoe soedinenie na port 902.