Router /Modem Issue

[mlumb7]

Hello,

I have a grandfathered AT&T wireless home internet account and use an MF279 that has been giving me trouble.
I of course have the dreaded v1.7 firmware that I am stuck on.

My MF279 has all of the router functions disabled and I connect it to a TPLink M5 mesh network and the TPlink does the routing.

Lately I have had to boot my modem (mf279) 4-5 times a day to get my internet back.
When the internet "goes out" :
I can still ping IP and dns name.
I can keep doing something on a page or service that was already loaded (example Zoom, Stadia currently playing game, Speed test page previously loaded can be run over and over again.

I can't load any new pages from a wifi or wired device.
If I just reboot the TPlink system nothing changes
If I reboot the modem it always comes back.

Seems like maybe stale DNS entries, but I'm really at a loss.
I ordered a replacement modem which gets here next week, but still hope to figure out whats going on in case the modem alone doesn't do it.

Thanks in advance for any help.

[BillA]

Either ATT has restricted your usage due to their silly TOS, or the DNS is corrupted on your pc.
Can't do much about the former, but you could try clearing your DNS cache by copy and pasting each line below one at time into a CMD window (don't worry if you get an error on some of them), then restart you pc.

arp -D *
ipconfig /release
ipconfig /release6
ipconfig /flushdns
ipconfig /registerdns
netsh int ip reset
netsh int ipv4 reset
netsh int ipv6 reset
netsh winsock reset
netsh winsock reset catalog

[Festerw]

It's an ATT issue. Workaround is here.
http://wirelessjoint.com/viewtopic.php?f=8&t=1403