I should add that my final goal is to get the debugger working, but, first things first.
I'll mark it as the Correct Answer if someone can point me to the online documentation for setting up RDS and Debugging in ColdFusion 11.
I followed those instructions, but it didn't work. I think it may be that I am not setting the address correctly, given my setup. Here's a screen capture:
The host name corresponds to an IIS site on my guest VM (bridged networking) that my DNS resolves correctly. The host name is definitely correct, since I also use it with FTP to write to the vm, and with http to surf the site. But just in case I've also tried the hardcoded IP address for my VM.
It's bound to port 80. I've also tried 8500, since it's the built-in tomcat server, and also 8080, since that is the traditional tomcat port.
I don't have SSL on that VM.
I haven't set up any alternative instances, so I left Context Root blank.
My firewall on the VM is turned off.