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GNUnet 0.10.1

We are pleased to announce the release of GNUnet 0.10.1. This release focuses on fixing the most pressing bugs that were found after the drastic changes from the GNUnet 0.10.0's release.

In terms of usability, users should be aware that (1) compiling GNUnet requires recent versions of libraries that were only released in recently and are thus unlikely to be available in common distributions, (2) the nascent network is tiny and thus unlikely to provide good anonymity or extensive amounts of interesting information, and (3) we are still in the process of addressing various major bugs and usability issues. As a result, this release is only suitable for early adopters with some reasonable pain tolerance.

About GNUnet

GNUnet is a framework for secure peer-to-peer networking. GNUnet's primary design goals are to protect the privacy of its users and to guard itself against attacks or abuse. At this point, GNUnet offers four primary applications on top of the framework:

The file-sharing service allows anonymous censorship-resistant file-sharing. Files, searches and search results are encrypted to make it hard to control, track or censor users. GNUnet's anonymity protocol (gap) is designed to make it difficult to link users to their file-sharing activities. Users can also individually trade-off between performance and anonymity. Despite providing anonymity, GNUnet's excess-based economy rewards contributing users with better performance.

The VPN service allows offering of services within GNUnet (using the .gnu TLD) and can be used to tunnel IPv4 and IPv6 traffic over the P2P network. The VPN can also be used for IP protocol translation (6-to-4, 4-to-6) and it is possible to tunnel IP traffic over GNUnet (6-over-4, 4-over-6). Note that at this stage, it is possible for peers to determine the IP address at which services are hosted, so the VPN does not offer anonymity.

The GNU Name System (GNS) provides a fully-decentralized and censorship resistant replacement for DNS. GNS can be used alongside DNS and can be integrated with legacy applications (such as traditional browsers) with moderate effort. GNS provides censorship-resistance, memorable names and cryptographic integrity protection for the records. Note that at this stage, it is possible for a strong adversary to determine which peer is responsible for a particular zone, GNS does not offer strong anonymity. However, GNS offers query privacy, that is other participants can typically not decrypt queries or replies.

GNUnet Conversation allows voice calls to be made over GNUnet. Users are identified using GNS and voice data is encrypted. However, GNUnet Conversation does not provide anonymity at this stage --- other peers may observe a connection between the two endpoints and it is possible to determine the IP address associated with a phone.

Other applications, including in particular the SecuShare social networking application, are still under development.

Key features of GNUnet include:

  • Works on GNU/Linux, FreeBSD, OS X and W32
  • P2P communication over TCP, UDP, HTTP (IPv4 or IPv6), HTTPS, WLAN or Bluetooth
  • Communication can be restricted to friends (F2F mode)
  • Includes a general-purpose, secure distributed hash table
  • NAT traversal using UPnP, ICMP or manual hole-punching (possibly in combination with DynDNS)
  • Small memory footprint (specifics depend on the configuration)

For developers, GNUnet offers:

  • Access to all subsystems via clean C APIs
  • Mostly written in C, but extensions possible in other languages including an extensive Java API
  • Multi-process architecture for fault-isolation between components
  • Use of event loop and processes instead of threads for ease of development
  • Extensive logging and statistics facilities
  • Integrated testing library for automatic deployment of large-scale experiments with tens of thousands of peers

Noteworthy improvements in 0.10.1

  • First release of GNUnet-java for 0.10.x-series
  • Improved documentation, including significant extensions to the Java developer tutorial
  • Improved exit policy specification capability
  • Various bugfixes resulting in peer-to-peer connections failing
  • Various bugfixes resolving crashes (set, conversation, transport, mesh)
  • Cosmetic improvements
  • Usability improvements for multi-user setups

The above is just the short list, our bugtracker lists over 50 individual issues that were resolved. It also contains a list of known open issues that might be useful to consult.

Known Issues

We have a few issues that are most likely not resolved in the final release. Users should be aware of these issues, which we hope to address shortly.

  • Crashes were reported against SET, MESH and DATASTORE that could not be reproduced (#3246, #3360, #3361, #3286)
  • Connection failures (KX) were reported but not diagnosed (#3340)
  • High CPU usage by FS/MESH was reported but not diagnosed (#3247)
  • Visualization of connection process in gnunet-gtk is incomplete (#3363)
  • gnunet-conversation-gtk is not ready for production use (#3298, #3290, #3292)

Additional information about these issues would be particularly welcome. In addition to this list, you may also want to consult our bug tracker at


The GNUnet 0.10.1 source code is available from all GNU FTP mirrors. The GTK frontends (which includes the gnunet-setup tool) are a separate download. GNUnet-FUSE 0.10.0 will work with GNUnet 0.10.1.
Please note that some mirrors might still be synchronizing..

All known releases
GNUnet on a FTP mirror near you
GNUnet GTK on an FTP mirror near you
GNUnet FUSE on an FTP mirror near you
GNUnet on the primary GNU FTP server
GNUnet GTK on the primary GNU FTP server
GNUnet FUSE on the primary GNU FTP server

Note that GNUnet is now started using "gnunet-arm -s". GNUnet should be stopped using "gnunet-arm -e".


This release was the work of many people. The following people contributed code and were thus easily identified: Bart Polot, Bruno Cabral, Christian Fuchs, Christian Grothoff, Claudiu Olteanu, David Barksdale, Fabian Oehlmann, Florian Dold, Gabor X Toth, Hark, LRN, Martin Schanzenbach, Matthias Wachs, Omar Tarabai, Supriti Singh, Sree Harsha Totakura, Yids.

Further Information

GNUnet Homepage
GNUnet Installation Handbook
GNUnet Forum
GNUnet Bug tracker