Radical to Radical synchronisation?

[wehkah]

Hello!

Is it possible to make two instances of Radical on two different machines synchronise each other's calendars and contacts?

The reason for this question is this:

I installed Radical on a small server at home, and my devices need to synch my calendars and my address books only while I am at home. There is no need for my server to be reachable from the internet, and it's also not possible dues to a dual stack connection by my ISP.

On Android, there's the fantastic app called "DavX5", which can be set to synchronise only when connected to a specific wifi SSID. On my Linux Notebook I use Thunderbird, which does not offer this possibility, and I hate it when TB throws the error message that my calendar and my address book is not reachable. So I thought, I could install a local Radical instance on my Notebook, to which Thunderbird would synchronise. This instance of Radicale could then be controlled by a simply script to only synchronise its content to my home server when I am at home.

Can this crazy idea be realised?

[kibuan]

Why not setup a wireguard connection to your home server from your devices? Then you can always reach the radical server from your devices.

[wehkah]

Would wireguard work through a dual stack connection? I can't even open a single port from the internet to my home network because of this kind of connection by my ISP.

[pbiering]

Wireguard should be able to tunnel IPv4 through IPv6, there are some hints on the Internet using Dr. Searchengine.