Tunnel with VTun and SSH
Connect two networks using VTun and a single SSH connection.
VTun is a user-space tunnel server,
allowing entire networks to be tunneled to each other using the
tun universal tunnel kernel driver.
An encrypted tunnel such as
The procedure described next will allow a host with a private IP address (10.42.4.6) to bring up a new tunnel interface with a real, live, routed IP address (220.127.116.11) that works as expected, as if the private network weren’t even there. Do this by bringing up the tunnel, dropping the default route, and then adding a new default route via the other end of the tunnel.
To begin with, here is the (pretunneled) network configuration:
ifconfig eth2eth2 Link encap:Ethernet HWaddr 00:02:2D:2A:27:EA inet addr:10.42.3.2 Bcast:10.42.3.63 Mask:255.255.255.192 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:662 errors:0 dropped:0 overruns:0 frame:0 TX packets:733 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:105616 (103.1 Kb) TX bytes:74259 (72.5 Kb) Interrupt:3 Base address:0x100 root@client:~# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.42.3.0 * 255.255.255.192 U 0 0 0 eth2 loopback * 255.0.0.0 U 0 0 0 lo default 10.42.3.1 0.0.0.0 UG 0 ...