If it was the clients update from the Internet than it leads to heavy traffic and in not all the scenarios client would be provided with internet connection except the connection to the server.
I asked comodo about this same issue, and they said that this option will be included in the new
version of CESM and CIS
I have download the latest version of CIS and CESM but you still cannot download updates from
the CESM server. just like you I don’t want all my users that has CIS to access the intenet directly to get
updates.
I think CESM and CIS has a very serous limitation on this issue. I hope more users can complain about this
so that it can be resolved