Unknown device got in my network

[Jbeall]

Hi all, the last two days an unknown device “Sercomm” has connected to my network and I don’t have any items like like IP cams or window or door sensors. I looked this up and it’s a home management system, which I don’t have! All it show is MAC address and host name. I have two ring cams/doorbell which I can identify. A couple amazon plugs (identified) and an echo (identified). I paused the Sercomm device and it came back (with different numbers after Sercomm) the next day even after I changed my password and all my devices. Any ideas?

[JlinnB]

Just received a notice at 3AM....following

[RobertWy]

With xFi, when it sees a new device, I identify it by th MAC address and assign a name and user.

Check all your devices and see if you can find their MAC address.  I have a mobil app that helps:

https://apps.apple.com/us/app/network-analyzer/id562315041

[chelle110]

Following, because I've had probably SIX of these pop up in the last hour. WTH?

[jb_pdx]

Just had several of these as well.

Anyone ever find out what was happening?

[EG]

Their Advanced Security feature has recently been pushed to their gateway devices via a firmware update whether you want it or not, hence the hypochondriac notices. It's buggy.

We've seen many many posts about this here lately ! The work-around is to disable the Advanced Security and not use it for now, it's buggy.;

https://www.xfinity.com/support/articles/using-xfinity-xfi-advanced-security