/TCP-Client-Server-Tunneling

Primary LanguageC

TCP Client-Server Tunneling

Server Side Tun Interface Configuration

In the Server run following commands to setup a TUN interface called asa0,

sudo ip tuntap add dev asa0 mode tun
sudo ip addr add 10.0.1.1/24 dev asa0
sudo ip link set dev asa0 up
sudo ip addr show

Client Side Tun Interface Configuration

In the Client run following commands to setup a TUN interface called asa1,

sudo ip tuntap add dev asa1 mode tun
sudo ip addr add 10.0.1.2/24 dev asa1
sudo ip link set dev asa1 up
sudo ip addr show

Note : Here as we are running client and server on the same machine so we are using two different names(asa1 and asa0) for tunnel interface.

Compile and Run

Server
    gcc tun-server.c -o tun-server
    ./tun-serve

Client 
    gcc tun-client.c -o tun-client
    ./tun-client

Test the Tunnel between Server and Client

Ping from host 1 to host 2 where our ping packets will be delivered through the TCP client and TCP server in the TCP socket connection (connection x),

ping -I 10.0.1.1 10.0.1.2