Check this thread linked below. It seems others have successfully forwarded a different external port to the internal port 80 with no issues.
https://community.tablotv.com/t/att-5268ac-router-port-forwarding-issue/
Check this thread linked below. It seems others have successfully forwarded a different external port to the internal port 80 with no issues.
https://community.tablotv.com/t/att-5268ac-router-port-forwarding-issue/