TUNS - a simple IP over DNS tunnel ================================== (c) Lucas Nussbaum <lucas@lucas-nussbaum.net> Licensed under GPL v3 or later (see COPYING file) TUNS is a prototype implementation of an IP over DNS tunnel. It is provided here in the interest of reproducibility of scientific results, so that evaluations that were carried out can be reproduced by others. Its main features are: - simplicity: it's thought to be as simple as possible. + no complex DNS stuff (TXT records, EDNS0, ...) ; uses only CNAME records + no splitting of IP packets: sets the MTU and forgets about it - efficiency + it's optimized for low latency Please note that using TUNS on networks that you don't totally control is illegal in many countries. As stated above, TUNS is only provided so that you can reproduce results obtained with it, in experimental setups. If you take the decision to use it for something else, the author of TUNS can't be held responsible. If you are unsure, please consult with a lawyer. Installation ------------ There is no real installation script. * uncompress the tarball. * install packages needed to build base32.so (in Debian: rake, ruby1.8-dev) * build base32.so: cd base32-0.1.1 rake cd .. cp base32-0.1.1/ext/base32.so . * then you can run tuns-client or tuns-server. (see below) Usage ----- You need to delegate a DNS zone (using NS records) to the system where TUNS will run. In the following example, we use dnstunnel.tuns.net. Client: as root, run tuns-client -d dnstunnel.tuns.net Server: as root, run tuns-server -d dnstunnel.tuns.net There's a number of possible options you can use to change default values. See tuns-client -h and tuns-server -h. After starting the client, type 'help' to get the online help. Troubleshooting --------------- The meaning of characters output in client's verbose mode is documented at the start of the tuns-client file. It can help to understand what's wrong. License ------- The base32 module is licensed under a permissive non-copylefted free software license (see http://base32.rubyforge.org/svn/trunk/COPYING -- the COPYING file wasn't included in the base32 tarball). TUNS is licensed under GPL version 3, or any later version. See the COPYING file.