At the end of the available IP address range appears what seems to be a mail server manufactured by “Naray Information & Communication Enterprise”. This would seem to be quite a security risk. Why is it there?
Hi and welcome bikeron! It looks like this question has been answered in https://forums.xfinity.com/t5/Your-Home-Network/unknown-node-on-my-LAN/m-p/2407079. Please reach out again if you have any further questions or concerns!
"Page not found" when I click on your link. Searching on the pharse "Naray Information & Communication Enterprise" also yields nothing found.
My apologies, that's odd. The link should have pointed to this answer: "10.0.0.254 = inside ip of comcast ASA firewall". Basically it's the internal firewall.