My machine hosts 8 OpenVPN clients: I have the interfaces tun0, tun1, ... tun7.
Each of these interfaces should offer Internet access. But sometimes some don't, because the VPN server loses Internet access itself.
Is it possible to verify whether each of these interfaces offers Internet access? Something like ping -I tun0 1.1.1.1 would be perfect, but unfortunately ping -I doesn't work with virtual interfaces. Any other ideas?
