Cloudflare DNS Challenge finally worked

[chchia]

I had been struggling for Cluoudflare DNS Challenge with Let's Encrypt for months, previously what i did was to manual obtain a root certificate from other machine and upload to Zoraxy, example using NPM to get *.example.com, i was needed to repeat this every less than 3 months.

today i finally found the potential issues, which i not sure if it a bug in Zoraxy or what.

Zoraxy was running in a Linux SOC with Armbian and docker
my route is Asuswrt Merlin with DNS director setup for Armbian to use custom DNS 1.1.1.1 (yea cloudflare) with IPV6 DNS
with above i never get Zoraxy and DNS challenge working, i did checked DNS resolve in armbian and in cloudflare dashboard, both return and show _acme-challenge record created and recognized. Zoraxy always return below message

acme: Waiting for DNS record propagation.

however as soon as i change the asuswrt DNS Director to point the Armbian to 8.8.8.8 (without IPV6 DNS), DNS Challenge worked!

i hope this can help those who have DNS Challenge issues.

2 things to check:
a. alter to no IPV6 DNS
b. change a DNS provider