The FritzBox doesn't attempt to use DynDNS if the Username Setting in the DynDNS is unspecified

[PeterStrick]

Describe the bug FritzBox will not attempt to connect to the DynDNS Update-URL if the Username Setting is unused or missing in the Update-URL

A Workaround for this was to change the following Update URL:

https://domain.com/fritzbox_dyndns.php?cf_key=<pass>&domain=<domain>&ipv4=<ipaddr>&ipv6=<ip6addr>&log=true

into: https://domain.com/fritzbox_dyndns.php?cf_key=<pass>&user=<username>&domain=<domain>&ipv4=<ipaddr>&ipv6=<ip6addr>&log=true

And also typing anything into the Username field in the DynDNS Settings.

The Script was unchanged

To Reproduce Steps to reproduce the behavior:

1. Enable DynDNS with the recommended Update-URL in the Readme, while also appending &log=true
2. Enter in the Domain and CloudFlare API Key
3. The FritzBox will not attempt to use DynDNS and no logs are present in the Script Location. Even after a reboot of the FritzBox

Expected behavior The FritzBox uses the DynDNS Update-URL and logs are present in the Script Location.

Screenshots Configuration that doesn't work:

Configuration that does work using the changed Update-URL:

Desktop (please complete the following information):

• OS: EndeavourOS (Arch Linux)
• Browser: Microsoft Edge
• Version: 115.0.1901.188

Additional context FritzBox 7530, FRITZ!OS 7.56