It has been a while since my last blog post, but there was no real foo happening to me during that time. But this issue really gave me some heartburn.
Let’s start with the general setup. We have a Linux VM in an OpenVZ environment. The hoster is Strato in Germany, but I don’t think that really matters. There are some known issues with the TUN device not being accessible within the VM, but Strato did their homework and I could see the module:
# lsmod | grep tun
tun 4242 -2
vznetstat 4242 -2 tun,ip_vznetstat,ip6_vznetstat