The IP-Filtering facility in Gateway Mediation Server, when used, allows or denies connection to the GMS only from the specified IP address or IP address range/ranges. The filter applies to connections from both the Viewer and Host side.
In a sense, yes. By using the IP filter on the RU Server you narrow the list of remote IP addresses with which the server is allowed to communicate. But then again, the IP address of the Viewer or Host may be changing - for example, when the Viewer is installed on a laptop and the laptop travels with its owner often.
So it is only recommended to use the filter if you are sure that Viewers and Hosts fall into a certain IP range and will stay in that range.
Nate, in fact you can even distribute a Viewer with a synced address book that way. This is because the sync properties that you specify for an address book in the Address Book Manager are static/same (server and port) and because of the fact that the address book on the RU Server always takes precedence over a local one. So if the local one is outdated (e.g. the Viewer you distributed hadn't been open for a long time) it will simply download the latest address book from the server the next time the Viewer is run.
2. Unpack the downloaded archive to your local disc.
3. Run the rutview.exe in the folder and populate the address book with records - either manually or (if you already have an address book file created in a different Viewer) use the Tools -> Import Connections command. Close the Viewer.
4. Distribute your folder to whatever machines you want to run Viewer on and run the Viewer executable whenever you want to run the Viewer (you can create a shortcut on Desktop just like for any other file).
I'm assuming that you are using the General address book. In this case you don't have to touch the Address Book Manager at all (it's in the Tools tab).