Sadly, a very, very large number. While Cx users are technically inclined, there's a surprising number of casual players who may not have the technical acumen t

Sadly, a very, very large number. While Cx users are technically inclined, there's a surprising number of casual players who may not have the technical acumen to forward ports, even with an illustrated guide. We've had several users quit because they can't/won't configure their firewalls, so we needed an automatic solution. upnp just isn't reliable- It fails in > 60% cases, according to some case study I can't find at the moment. Hamachi won't work for the reasons above. Too Expensive, and requires both parties to have the VPN installed. Our only solution was to roll our own.