Equipment that I have:
Time Warner Cable Modem Router: UBee
Linksys/Cisco Wireless Router: Linksys EA6500/AC1750
GenieGo client: Apple iPhone 5s
I installed my GenieGO and all the light lit up blue and internally I could view the DVR content within my home on my wireless network, but for some reasons not matter what I did I couldn't get the Out Of Home portion to work correctly. It kept telling me that it was not setup correctly. I tried to configure the OOH using my desktop and my iPhone 5s
After going in circles with Directv technical support telling me all that needs to be done is to install and make sure that a firewall is not configured on my cable modem router, I called Linksys to check their firmware and any other issues that could be stopping the communication. After going back and forth I realized that everyone was pointing fingers at each other and not knowing exactly how their firewall/application software/cable modem router works together to facilitate the service that was needed. So long story short I had to analyze logs, put a distributed sniffer on my internal network and figure out whats going on. Something I shouldn't have had to do, but it dawned on me that what we are trying to do is not routing at all. In actuality its switching and bridging that needs to happen to get this stuff to work.
Cable modem routers and wireless routers can be put into bridge mode to connect two different networks together. In essence that's what needs to happen with the Cable-Modem router is that it doesn't need to actually work distinctly as a router, but it needs to also work as a bridge such that the communication can work. Yes broadcast/multicast/unicast can operate at the TCP layer, but sometimes even with connection-oriented communication there still needs to be some bridging. Since there's no switch or spanning tree, then the cable-modem router needs to be put in bridge mode. I called Time Warner, had them to put my Ubee router in bridge mode and all my devices worked like a charm.
I don't know if this helps you or anyone else, but interestingly after I figured this out, I found a video about port triggering which discusses putting your cable-modem in bridge-mode to enable the streaming needed to support devices like Xbox and PlayStation that does the same type of streaming except via the game and through different type of ports.
Here's the video from Linksys... It took me about 3 days to get to the root of this. I'm hoping this may be of support to some of you that might have the combination of Time Warner Cable a Linksys Router, Mine was the EA6500.
Here's the video
http://kb.linksys.com/Linksys/ukp.aspx?pid=96&vw=1&articleid=26943
Hope this is helpful to some of you and minimizes your search to get OOH working for you.