However it isn't working at all on a remote site and I'm just getting " Failed to connect to fpdownload.adobe.com port 443: Operation timed out" messages. Does anyone know the destination IP address or range, protocol and port numbers that are required for this to function?
We distribute content from the Akamai CDN. The client is going to be routed to the "nearest/fastest/least-cost" node on the network based on a routing algorithm in an dynamic and non-deterministic way. There's no way to give you a predictable IP range.
We provide a number of supported update mechanisms for use by system administrators, described here:
In particular, there are a number of deployment methods for distributing via SCUP/SCCM or running an internal Flash update server that might be of interested, if they don't want to open their firewall to arbitrary endpoints.