dyndns | dyndns client Go package | DNS library

I installed a python script for updating my dyndns record for my nextcloudpi: https://github.com/Domain-Connect/DomainConnectDDNS-Python When i run the program from the terminal by using domain-connect-dyndns update --all it works out well. Now i created a systemd service and a timer calling the service. The service is calling a very simple bash file:

Following the code from here I have got an IP address checker. However instead of outputting an IP address it outputs []. Code:

I have a problem configuring RDP. This is the situation:

PC1 (host): Windows 10 Pro with Hyper-V
The guest-VM is Windows 10 Enterprise

I also have another PC in the WLAN, a FritzBox router and an external PC in the internet.

The routers external IP is mapped through dynDNS.

On the router I have forwarded TCP port 3389 to the host PC1.

Host PC1 has one active WLAN adapter. It has a 2nd LAN adapter that is not connected and disabled.

The guest VM has internet access through the default internal switch of Hyper-V, that is not configurable an uses the WLAN adapter. The WLAN adapter is configured for shared connections. A second (external) switch can't be configured with Hyper-V, as the only active adapter is already used by the default switch.

All systems have RDP enabled, port 3389 open, and network discovery enabled. They all belong to WORKGROUP. A domain is not configured.

I can open the following RDP sessions:

from host PC1 to the guest VM
from PC2 to PC1
from the external PC via internet to PC1

What doesn't work and what I need to configure:

from WLAN PC2 to VM guest on PC1
and, most importantly:
from external PC to VM guest system in PC1.

What is wrong or missing?

My objective is to setup site like noip/dyndns.

I have purchased domain ( say locations.com ). In my cpanel i have redirected that into a static ip (say 128.10.10.10) I have created subdomain (say device.locations.com) and redirected it to a another static ip (say 128.20.20.20). This is working fine.

How ever i wish to setup dynamic DNS service in device.locations.com (128.20.20.20) I laredy installed bibd (version 9 in Centos 7)

Probluem is : say I have a dynamic client. Which i registered as "serial001.device.locations.com" which is having ip ( 50.50.60.1 , which will change over the time)

if i issue "dig serial001.device.locations.com" in dns server (128.20.20.20/device.locations.com ) I'll get,

I'm running simple function in Google Cloud Functions to update DNS records (see code here). Currently I create service account with roles/dns.admin privileges and assign that to the function. I'm then relying for Functions' beta support for client authentication & authorization.

Alternative approach could be NOT to provision the service account credentials (with roles/dns.admin) for the function, but instead pass credential in each request.

How can I do this with Go runtime - How can I use the bearer token from the request with the Google API Go client?

Pros/cons in these two approaches?

I'm local on Mac OS 10.14.6 using Angular 8, Symfony 4.3 and mercure 0.72 darwin. I'm quite new to symfony. I wanted to dispatch updates only to authorized clients on my local machine. So far it really is a big pain. I hope I can find some help or answers here.

Last error I get is

http: TLS handshake error from ip:55289: acme/autocert: unable to authorize "mydyndns-url.com"; challenge "http-01" failed with error: acme: authorization error for mydyndns-url.com: 400 urn:acme:error:connection: Fetching http://mydyndns-url.com/.well-known/acme-challenge/SomeHash: Error getting validation data; challenge "tls-alpn-01" failed with error: acme: authorization error for mydyndns-url.com: 400 urn:acme:error:connection: Connection refused

plus

I am trying to listen to music (streaming) in background but the streaming stop when I open another app.

I am writing a program that uses a QWebView to display a webpage hosted on a server within the local network. Unfortunatly, it does not work with any local webpage (e.g. 192.168.1.1).

One webpage in the network is also acessible from outside (using dyndns). Accessing that page works, if I do so using the dyndns url (as it does with any remote webpage such as www.qwant.com), but not if I use it's local ip. Using Firefox, all those local pages were loaded successfully.

This is my code that should display the page:

I want to add ip license in my application to do this, I get the user's ip address and compare it with the list of ip addresses on my website. However, my codes take all the ip addresses in the list, so the output always returns false.

I assigned the user's IP address to a variable and compared it to the ip address query result. It works this way, but I want to manage the ip address list from a web address.