[링크] DNS 터널링

http://www.uow.edu.au/~kwanwu/DNSTunnel.pdf 
http://www.blackhat.com/presentations/bh-usa-08/Miller/BH_US_08_Ty_Miller_Reverse_DNS_Tunneling_Shellcode.pdf
http://swbae.egloos.com/2525635

http://www.youtube.com/watch?v=D4TDhGecB9A&ytsession=gFgoOK9shHl3Hbf_qFhwX6Yxmcw7FzgO6s89Dw1g1IUUUCWYzQiuovjFswdq8-aS0rndbKblcgyo2fbh3vCB6LiAVGVtqkHs96R_9bxg7qEvw0mx6C62kR2y7OzieUN6QVK2jl3GeBhafAM7QJYd7mQfHE0mNoxjrKamnFxhKEF3GduHb1UpIzVpD_NAAYvWfotP8VldQCQc9yfvf1uy2n1yPuBwdE1oEtdG_B54DiFH1ISixMC_FfUdFRGyP19CWcK8Xd8AMRwqwGqP1cXHGi_p3chV-5kR
http://dev.metasploit.com/redmine/issues/444