n2n is a layer-two peer-to-peer virtual private network (VPN) which allows users to exploit features typical of P2P applications at network instead of application level.

           .............VPN................
+------LAN-+-----+                 +- Edge.
|          .     |                /       .
| Client ->.Edge +-> Supernode <-+- Edge  .
|          .     |                \       .
+----------+-----+                 +- Edge.
           ................................

Supernode (eth0:1.2.3.4)

$ docker-compose up -d supernode

Edge (eth0:192.168.1.23/24, n2n0:192.168.100.x/24)

$ docker-compose up -d edge
$ sysctl -w net.ipv4.ip_forward=1
$ iptables -t nat -A POSTROUTING -o n2n0 -j MASQUERADE

Client (eth0:192.168.1.45/24)

$ ip route add 192.168.100.0/24 via 192.168.1.23
$ nmap -sP 192.168.100.0/24