Use of AWS (Amazon Web Services) to Build Lightmass

I’m pretty sure the problem here is that when the coordinator sends back an IP for the machine that will be doing the work (one of the other agents) it sends back the “private ip” for your EC2 instance. Go into your swam agent on your local machine and up the log level to something like extra verbose. You should see a line in there that says something like “Trying to open a remote connection to …”. There will be an IP address in that line, if you try to ping it you won’t be able to because it’s internal to Amazon. Compare that to your private IP address on your EC2 instance, it should be the same.