ERROR: Failed to update CloudFlare DNS <domain> from X.X.X.X to ;; connection timed out; no servers could be reached

[gui-li]

I try the command dig +short myip.opendns.com @resolver1.opendns.com | tr -d '"' in docker, it returns nothing. The resolver1.opendns.com domain is poisoned in China. Could you please provide a more robust and reliable way in getting IP? This link provides a multiple source in getting ip.

[gui-li]

I pass curl -sf4 https://ipinfo.io | jq -r '.ip' to parametrer CUSTOM_LOOKUP_CMD, then it works as expected. I wonder why it can't get the public IP address at

docker-cloudflare-ddns/root/app/cloudflare.sh

Line 53 in a96b637

IP_ADDRESS=$(curl -sf4 https://ipinfo.io | jq -r '.ip')

[gui-li]

The IP_ADDRESS at this line will return ;; connection timed out; no servers could be reached, and it's not equal to "", so it will not execute line 53.
PS: CLOUD_FLARE_IP is ;; connection timed out; no servers could be reached