Dns2tcp is a network tool designed to relay TCP connections through DNS traffic. Encapsulation is done on the TCP level, thus no specific driver is needed (i.e: TUN/TAP). Dns2tcp client does not need to be run with specific privileges.
You can download it from the following link: https://packetstormsecurity.com/files/download/96396/dns2tcp-0.5.2.tar.gz
Source: https://packetstormsecurity.com/files/96396/Dns2Tcp-0.5.2.html