I have 2 BananaPi OpenWRT One routers. Can I use them to temporarily route a smart TV in country A (my parents in law), via internet connection in country B (my home). It is currently connected via ethernet cable to the current router so I presume I might have to do the same.
Tailscale or wireguard or some other option? Ease of managing it is high on the list as I am not that technically savvy (as you can see from this post).
Any pointers gratefully received!
WG can be used, if the server end got a public WAN IP, if not, you'll have to use something else, like tailscale.
PBR can be set up to route only some devices and/or IPs through the tunnel.
check out the guides @egc have written, at https://github.com/egc112/OpenWRT-egc-add-on/tree/main/notes.
Just like @frollic said, if either you or your in-laws have a public IP address you can use WireGuard which is fairly easy to setup is lightweight and does not involve a third party.
The side with the public IP address holds the "server" the other side is the client
Start with the server setup guide this also has a paragraph about how to check if you have a Public IP address.
WireGuard Server Setup Guide
WireGuard Client Setup Guide
If neither sides have a public IPv4 or IPv6 address then you can use things like Tailscale or Netbird and there are others also discussed in the Server setup guide
I have Netbird setup for testing:
OpenWRT Netbird setup
But Tailscale which does more or less the same is also a valid choice