DMZ - Stopped working.
I have an Xfinity supplied ARRIS Group, Inc. TG1682G modem/router.
Around the second week of May 2022, my DMZ stopped working and it had been working since 2018. And up until May 2022, I was able to set everything up via the 10.0.0.1 address after logging in.
But now everything is required to configure via the website: https://internet.xfinity.com/network/advanced-settings/dmz
And like the OP, I turned off Advanced Security (as others have noted to do) and it still does not work even though the DMZ shows as enabled and set to my LAN side router's WAN IP address (10.0.0.2).
Also odd, is the very next day when I log back into the website and check the DMZ, I see it is back to disable.
And even stranger, when I call Xfinity tech support (and got pushed back to the more experienced tech person) she said she can no longer access my modem from her end and it tells her to go to myxfi???!!!! So, tech support can't log into my modem anymore.
I have a feeling the website is not passing the settings to the modem/router.
Yes, I can probably go to bridge mode but was avoiding that because of various reasons that don't need to be discussed here and I like the double NAT with both modems and the DMZ set for my modem.
Anyone figure this out yet?