Cannot ping from Internet to Hughes

Please note my internet is up and all good. Also, I am not trying to ping from my hughes out to the internet. It is the other way, pinging from internet to the hughes HT2000 which is failing since day 1. I have 7 hughes at different sites and this is the only one that is not pingable. I confirmed that the configuration for Intrusion (IDS) is unchecked for "ping to wan interface"