ATT Hijacks all DNS and no way to disable it
ATT equipment blocks all DNS queries on port 53 so there is no way to use your own DNS server config on a local machine or local router. All requests on port 53 get hijacked and routed to ATT DNS servers. Disabling the setting on the ATT website for the hidden “DNS error assistance” did not do anything. The supplied modem firmware does not have any customizable DNS server settings so impossible to change there. This is an huge invasion of privacy and security by ATT just so they can build profiles on all their users for advertising. Will be leaving ATT if this is not fixed ASAP.