Hello dear forum,
as I’m german and unfortunately don’t speak english, I’m using deepl.com for this post. I hope you forgive me for any language mistakes and can still help me.
Now to my problem: I run my IPFire behind a FritzBox 6591 which is connected to a Vodafone cable connection. No cable modem from Vodafone is used.
I can check this by calling my website in the DMZ after changing my Vodafone IP. If this is accessible, it means that dyn.domain.de has taken over the new Vodafone IP.
However, with OpenVPN I have the problem that the VPN clients of my Android devices do not notice this IP change. I interpret this as that the OpenVPN client on the Android devices uses an internal outdated DNS cache and therefore tries to access the outdated Vodafone IP?
My configuration in IPFire looks like this: https://wtf.roflcopter.fr/pics/qkMDxaS0/rKSRt8qO.png
Is there any way to solve this problem?
Can I let the OpenVPN client clear the DNS cache on every new connection attempt, so that not the old but new IP is used via dyn.domain.de?
I hope I have expressed myself understandably enough so that you can help me with this problem?
Translated with www.DeepL.com/Translator (free version)