* architecture: using the redirect-gateway described at
 https://www.tinc-vpn.org/examples/redirect-gateway/

       vpn tunnel: 10.8.5.2
                  default gateway: 10.8.5.1

       veth: vethIntestns 10.10.5.2
        |          Network name space: vpnns.srv
    ----| kernel --------------------
        |
       veth: vethtestns 10.10.5.1

       enp5s0        master 192.168.0.3
============================
                  public ip

                  public ip
============================
      eth0?         cirno 192.168.0.5

     vpn tunnel: 10.8.5.1