How-To: Let's Encrypt on GLDDNS domain

[japa182]

It probably has something to do with this change?

DDNS host name not working suddenly?

In our recent update, the server use the TCP peer public IP to update domain data instead of using http params in order to improve the security. So there is a issue in the old firmware, IPv4 data was uploaded by IPv6 network. It mean that the IPv4 record would not be update any more in the both IPv4 and IPv6 network . We decide to recover the original processing logic temporarily, but still consider close the logic when the most user update to the laste firmware in the future days.