From Hentschel
/* Setting up VPN via SSHD */
First, on zm.home, ensure IP forwarding is enabled via <pre>sysctl net.ipv4.ip_forward</pre>, and set it to enabled in ''/etc/sysctl.config'' if not.
Second, the gateway (default router) on network B needs to be modified to redirect traffic destined for host hentschel via eth0 on host zm.home. We don't redirect all internet traffic via the tunnel, just what is destined for the hentschel host. On the Asus router, that looks like this:
[[File:asus-static-route.png|400px|thumb|left|Under ''LAN''->''Route'']]<br clear=both>
To actually create the tunnel, here is what needs to happen:
: on zm.home
ip route add 192.168.1.0/24 via 10.0.0.100
</pre>
At this point, a request for any host on network B that originates on host hentschel will be answered. At the same time, traffic for hentschel from network B will be directed there via zm.home. Note that the web server on hentschel does '''not''' answer since it's interface is only set to the public interface.