DDNS cannot determine public IP after upgrading to 2.7.1

NickyDoes

DDNS seems to have stopped working after upgrade.

Command prompt:

# curl  http://checkip.dyndns.org/
<html><head><title>Current IP Check</title></head><body>Current IP Address: 136.54.116.71</body></html>

System logs:

Nov 23 05:54:05 	php-fpm 	49308 	/rc.newwanip: Dynamic DNS (home.demarcohome.com) There was an error trying to determine the public IP for interface - wan (re0 ).
Nov 23 05:54:05 	php-fpm 	49308 	/rc.newwanip: Dynamic DNS (home.demarcohome.com): running get_failover_interface for wan. found re0
Nov 23 05:54:05 	php-fpm 	49308 	/rc.newwanip: Dynamic DNS cloudflare-v6 (home.demarcohome.com): _checkIP() starting.
Nov 23 05:54:05 	php-fpm 	49308 	/rc.newwanip: Dynamic DNS: updatedns() starting

Both these posts are relevant, but not conclusive:

https://forum.netgate.com/topic/158230/custom-check-ip-service-not-working-there-was-an-error-trying-to-determine-the-public-ip-for-interface-wan/2

https://forum.netgate.com/topic/138216/dynamic-dns-client-can-t-determine-public-ip-from-behind-nat-router

Reasonably typical home networking config:
pfSense 2.7.1
Dedicated x86 machine with 2x Realtek ports (I know, realtek, but they have been working since 2017)
Google Fiber -> pfSense on WAN

What am I missing?

SteveITS

@ndemarco There’s a verbose logging option on the ddns settings, try that. There have been cases where something changes at the server end, for example utf encoding.

NickyDoes

@SteveITS
I had enabled verbose logging already.

And I had toyed with Hurricane Electric as a check IP provider.

NickyDoes

So this appears to be a bug.

Steps to reproduce:

Verify IP address is returned as a compliant text string is returned via command prompt.
Attempt to update DDNS.
View log. Verify log reports inability to determine WAN connection

Expected response: DDNS CheckIP returns the valid IP address.

If you disagree, point out what I'm doing wrong.

NickyDoes

@ndemarco Uh, this is resolved.

I had chosen, for the DDNS provider CloudFlare v6 not realizing the fairly obvious fact that "v6" portion wasn't the version of CloudFlare DDNS protocol. It is a short reference to IPv6.

After selecting the correct CloudFlare for IPv4, all my problems are in the past .

Now, to impement IPv6 on my internal network...