Since the notification that Sophos's Dynamic DNS is going away in January 2022, I decided to use NoIP.com as my Dynamic DNS provider. It particularly liked the idea of using NoIP's group feature, which allows for separate user credentials for different DDNS hostnames.
The only problem is that using Groups in NoIP.com means that the Login Name for the DDNS client becomes <group name>:<NoIP.com login name> and if you use this in the Login Name field on the XG, you'll end up with errors like this in the System log:
DDNS update for host <FQDN for DDNS host> was Failed. Last Updated with IP 0.0.0.0. Failure Reason: noconnect
To fix this replace the colon with the URL encoded value %3A - as follows:
<group name>%3A<NoIP.com login name>
The NoIP.com login name can either be the username or the e-mail address for the NoIP.com account.
Also make sure the DDNS hostname you created has been added to the Group. If you don't do this the XG will log the update as successful, but the IP won't change at NoIP.com.
An example if it isn't clear what's happening:
NoIP.com account username: myaccount
NoIP.com DDNS hostname: myhost.test.com
NoIP.com Group name: mygroup
NoIP.com Group password: grouppw
XG DDNS client hostname: myhost.test.com
XG DDNS client Login name: mygroup%3Amyaccount
XG DDNS client Password: grouppw
Hope this saves anyone else some time if they want to do this.
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