How to open up Airplay to the gateway machine?

[dsnetter]

I have a wireless connection to the internet, and am using my MBPro to get online. The wireless ISP uses MAC address verification; I am only permitted to connect one device directly to the wireless network, due to "wireless overhead issues." Or some such. I am permitted, however, to create my own network, provided I only connect to their network using one connection.

So here's what I've done: I also have an iPhone, an iPad, and an AppleTV, all connected to an Airport Express base station, CAT-5'd to my MBPro as its gateway to connect to the internet through the MBPro's wireless connection. I am using WaterRoof for NAT.

Here's the thing. I can stream from my iPhone to the AppleTV, and from the iPad to the AppleTV, no problem. Airplay works like a champ. If I disconnect my MBPro from the internet, and connect to the Airport Express's WiFi, then I can stream from my MBPro as well. But when my MBPro is connected to the internet, and acting as a gateway, it can't find my AppleTV.

I'm assuming this is a broadcast issue or something, and that I need to tell my Airport Express to allow this communication from the gateway into its wireless network. Anyone know how I would do that?

Thanks in advance,
DS

 

[mikes63737]

Is the express in Bridge mode? It sounds to me like the express is doing NAT again.

If you're interested in trying it, you might be able to simplify your setup by using two expresses -- one in client mode to connect to your ISP, then another that does NAT & DHCP, and a wired connection directly between the two expresses. This way, your MacBook Pro will be just another client, rather than the gateway.