Schederz

I hadn’t even thought of that—I’ll make sure he corrects it. I don’t want him having to go to his basement every time a change is needed, unless absolutely necessary.

I figured that the firewall was causing the issue, but I couldn’t locate the setting that blocks unknown IP addresses—and he didn’t know how to disable it when I asked. I’m used to Windows Defender, as I routinely turn off the firewall on my laptop when programming Lutron Radio Ra2. I’ll check out the wiki section you mentioned to see if I can figure out how to disable it and/or create an exception for the ISY’s IP. Also, is there a way to get the ISY's IP without logging into the router? I doubt he knows how to log into it because I think the router he has is the previous homeowner's.

It was a Lenovo laptop of some kind running Windows

I'm an installer, IOX Launcher found the customer's ISY994 right away on my laptop, and worked fine. At the end of the service call, I tried to set up the customer's computer so he could access the admin console too. So I installed Java and IOX Launcher, and then I tried accessing the admin console from his laptop via WiFi, but IOX Launcher didn't find any ISYs on the network. So I decided to unplug my working computer from the network switch and plugged his laptop into the same cord and port I was using, but the IOX launcher still didn't find an ISY on his network. We tried restarting the computer, we tried power cycling in ISY994, and I tried to look through the security settings on his laptop. I'm not familiar with Bitdefender so I could have missed some firewall settings. The only other thing I could think of is his computer had a USB-C to USB-A adapter, could that be the issue? I've used one on my computer before with no issues, but maybe some types can handle network signals while others can't. I also use an adapter from Ethernet to USB-A which I used on his computer along with the USB-C to USB-A adapter, but that same setup has worked before with no issues on mine. The only difference was the brand and there is an SD card reader as well as a few USB-A ports on his, while mine only has USB-A ports. Oh, we also tested plugging in his laptop to the network immediately after successfully finding and logging into the admin console on my computer, without fail, mine worked, while his never did.