ESP 8CDC4E

@user_0fdf9d 

First thing is to check that you have a MOCA filter on your line.

Take a look at this thread: Ctdi cmtx listed 4 x

Thank you!  I have ordered a filter.   For now I have paused the devices access that has stopped the notifications and access so far.

I usually see them associated with smart outlets or smart lighting, although anything could be using that same radio hardware (garage door).   Do you use any of that stuff?  Can you actually ping the IP address it's getting?

It's a Internet of Things (IoT) device, no operating system, no IP address, it des have a MAC addy

@user_0fdf9d 

You can do a MAC address lookup here and maybe get some info about it;

https://www.whatsmyip.org/mac-address-lookup/ 

Well, there's on your network, and trying to connect to it.  They are two different things.  Anything can "try" to connect to your WiFi and you'll see the Mac.  If they are successful or not depends on if they know your WiFi password, and hopefully, you are using a decent one with at least WPA2 encryption.

What's on your network?  arp-scan is a good linux tool.  Scan your subnet and see what is really there.  No linux?  No problem.  It's built into windows now (Windows System Linux).  It's just an option you install like any other windows component:  https://learn.microsoft.com/en-us/windows/wsl/install

Install the default ubuntu distro of the moment.  Spawn a linux from a cmd prompt.  Just type "wsl".  When linux is up, (# is just the prompt) type:

# sudo apt-get update

# sudo apt-get install arp-scan

Now just scan your network.  If it's default Xfinity stuff, your internal subnet is probably 10.0.0.0/24 so:

# arp-scan 10.0.0.0/24

In a windows cmd box, you can also type ipconfig and it will show you your IP address.  Just change the last number to 0/24 and you'll be scanning the subnet you are currently on.

It will show you what is there, and actually connected.  Is there anything you can do about something close trying to connect to your WiFi?  Well, you can change the SSID your gateway is broadcasting if you are using the default, but they might try to re-configure the device again.  It's probably just a hijacked or misconfigured device a neighbor has. 

There's some git-hub projects too for arp-scan with windows directly you could try as well.  Just update your anti-virus first.

If it bothers you a lot, you can triangulate the device with an SDR (software defined radio).  It's the poor man's spectrum analyzer.  Then you hone right in on an intentional radiator and bash it to pieces with a hammer.  When the signal goes away, you know you have it ;)

Gah.  Leave it to windows to bug up linux sockets.  WSL is currently broken with an open bug.  Welp, try an Ubuntu USB stick.  You don't need to install it, it runs as a live CD:  https://ubuntu.com/tutorials/install-ubuntu-desktop#1-overview