Q: Does Runecast expose any information to the outside world?

A: No, Runecast does not send any of your data out of your network. Runecast can be configured to poll Runecast servers and look for updates on a set interval, but no information is exposed to the outside world. If even this level of communication is not permitted, Runecast has an Offline Update mode where updates can be applied by installing an update package downloaded from a workstation, having passed all the quarantine policies you might have.