Remote access not working from other countries

Configuration
1

Hello community,

After setting up DuckDNS+SSL I can connect with my mobile device to HA without problems.
But recently I was on vacation in Italy and Spain and couldn’t connect to HA with by mobile device.

I am running HassOS on a RPi3 and use a script to send my ipv6 to DuckDNS (ipv4 ist not in use because unfortunately I have a DS-Lite connection → Vodafone). Like I said I never had an issue in Germany with a mobile connection.

Ist there a problem if the mobile carrier in an other country does not support ipv6 or could it be an other problem?
Any suggestions how to fix this? I read about reverse proxy from NGINX. Would this fix this and give me a reliable connection no matter where I am and wich connection I’m using?

Glad about any suggestions.
Andreas

2

Firewalls can block / allow communication based on country of origin. Perhaps in your setup only connections from Germany are allowed.

3

Do you mean the firewall on my router?
Unfortunately the hardware ist from my internet provider and very limited in function.
The only option is to disable the firewall completely and I prefer not to do this😉
And it ist difficult for me to do try it out because the connection works when I’m in my t-mobile network anyways.

4

Somewhere in the chain, duckdsn → ha