LinuxQuestions.org - Forwarding the IP frame from tun0 to eth0

Hi all,
I am working on TUN/TAP for tunnelling IP packets from the application to the network.

I am able to open the tun device and assign the IP address to tun0. The steps I followed are given,

1. Opened the tun device /dev/net/tun
2. Assigned a IP address to the tun0 using ifconfig tun0 10.66.67.247
3. Added to the routing table using the following command route add -host 10.66.67.247 dev tun0
4. I have loaded the tun device using modprobe tun and I was able to see the device when I gave the command lsmod | sort

Code:

        tsdev                  7520  0 

        tun                    10336  1

5. the output of the command route is

Code:

10.66.67.247    *  255.255.255.255    UH    0      0        0 tun0

10.66.67.192    *  255.255.255.192    U    0      0        0 eth0

default 10.66.67.193    0.0.0.0        UG    0      0        0 eth0

6. I have installed uml-utilities & bridge utilities.
7. finally I wrote a IP frame to tun0 device . The IP packet was for opening a ftp session on other machine (10.66.67.220.

I could seee the packet received in tun0 device using ifconfig and wireshark.

Code:

tun0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  

          inet addr:10.66.67.247  P-t-P:10.66.67.247  Mask:255.255.255.255

          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1

          RX packets:1 errors:0 dropped:0 overruns:0 frame:0

          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:500 

          RX bytes:60 (60.0 b)  TX bytes:0 (0.0 b)

The IP Packet which I sent is received in the tun0 device, but furhter its not routing it to the eth0 device.

My question is, how do I route the IP packets recevied in tun0 device to the network via eth0 and vice versa.

Is there any package or driver i need to install inorder to configure the tun device for routing it to the eth0

Thanks you in Advance
Alan J