Keenetic Ultra II. Version 4.00.A.10. DoH and DoT was configured.
After update to 4.00.A.18 can't connect to any IP. Remove DoH and DoT through web-interface, enable ISP name-servers, and after that ping IP and DNS resolve works.
Configure DoT and DoH through web-interface, Cloudflare check pass. Try export config and upload them, issue with ping any IP.
After each update, I need to remove all elements and reconfigure the DNS settings.
Today it happened again when upgrading from 4.00.A.18 to 4.00.B.2
Some parts from my config:
interface GigabitEthernet1
ip address dhcp
ip dhcp client hostname Keenetic_Ultra
ip dhcp client dns-routes
ip no name-servers
ipv6 no name-servers
ping-check profile default
dns-proxy
rebind-protect auto
intercept enable
tls upstream 1.0.0.1 sni cloudflare-dns.com
tls upstream 1.1.1.1 sni cloudflare-dns.com
https upstream https://cloudflare-dns.com/dns-query dnsm
filter engine public