This is the most common scenario where in pre-prod and production environment in most of the organization there would be a restriction to access the FTP sites directly. There ideally will be configured proxy to make this access possible.
Some of the most common combinations will be FTP proxy for FTP access, http proxy for http/https access.
Currently we found that RA update service can't use the FTP proxy to access Action pack site due to which functionality of ROC which list down available action packs and hence listing down any upgrade available doesn't work.
The support for proxy should be considered and it should be easily configurable to change the proxy from FTP to http depending upon customer requirement.
Raising this is on behalf of customer.