I noticed on my router one or two hours ago that there were two new devices connected to it that I did not recognize. In a normal situation I would think that my WiFi password was just compromised, but I noticed that one of the connections was, according to my router, wired i.e. connected to my Ethernet.
The wired device was named
Amazon-Linux-COMPUTER. I attempted to ping the IP address of the wired machine, but received no result.
I tried to perform a port scan about 15 minutes later and received a message that the host was offline; I rechecked the router and the wired device had disappeared.
What does this mean? Is someone really physically connected to my network, or can this be spoofed? Is there an intruder within my residence? (I know how ridiculous that sounds, that someone would come in for the sole purpose of connecting their Linux device to my Ethernet and nothing else, but I'm not sure if there is any other explanation.)
Here is the device as it appears in my router:
I cannot ping the device nor perform a nmap on it (host offline), but my router says it is there.