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How Bandwidth Scanners Monitor The Tor Network

by juga | April 11, 2019

The Tor network is comprised of thousands of volunteer-run relays around the world, and millions of people rely on it for privacy and freedom online everyday. To monitor the Tor network's performance, detect attacks on it, and better distribute load across the network, we employ what we call Tor bandwidth scanners.

  • 5 comments

Introducing Bastet, Our New Directory Authority

by tommy | November 02, 2017

We added a new directory authority last month, increasing the diversity and stability of the directory authority system. The latest authority, named “Bastet” after the ancient Egyptian goddess, is run by Tor contributor Stefani.

  • 13 comments

Possible upcoming attempts to disable the Tor network

by arma | December 19, 2014

The Tor Project has learned that there may be an attempt to incapacitate our network in the next few days through the seizure of specialized servers in the network called directory authorities.

  • 350 comments

10 years of collecting Tor directory data

by karsten | May 15, 2014

Today is the 10th anniversary of collecting Tor directory data!

  • 15 comments

Tor 0.2.2.23-alpha is out

by erinn | March 10, 2011

Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
they restart they don't lose their bandwidth capacity estimate. This

Tor 0.2.1.27 is released.

by phobos | November 26, 2010

Tor 0.2.1.27 makes relays work with OpenSSL 0.9.8p and 1.0.0.b --yet another OpenSSL security patch broke its compatibility with Tor.

Tor 0.2.2.14-alpha released

by phobos | July 19, 2010

Tor 0.2.2.14-alpha greatly improves client-side handling of circuit build
timeouts, which are used to estimate speed and improve performance. We

  • 41 comments

Thanks to Shinjiru

by phobos | November 29, 2009

Earlier this year, we started looking for a new hosting location for a directory authority outside th

  • 9 comments

Tor 0.2.2.5-alpha released

by phobos | October 12, 2009

On October 11, we released Tor 0.2.2.5-alpha.

It can be downloaded from https://www.torproject.org/download/.

  • 5 comments

archive.torproject.org is now live

by phobos | July 29, 2009

By popular request, we've created http://archive.torproject.org/. It serves as an archive of all released versions of Tor since 2004.

  • 29 comments

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Recent Updates

New release candidate: Tor 0.4.5.4-rc

by nickm | January 22, 2021

There's a new release candidate available for download. If you build Tor from source, you can download the source code for 0.4.5.4-rc from the download page on the website. Packages should be available over the coming weeks, with a new alpha Tor Browser release likely around this coming Tuesday.

Tor 0.4.5.4-rc is the second release candidate in its series. It fixes several bugs present in previous releases.

We expect that the stable release will be the same, or almost the same, as this release candidate, unless serious bugs are found.

Changes in version 0.4.5.4-rc - 2021-01-22

  • Major bugfixes (authority, IPv6):
    • Do not consider multiple relays in the same IPv6 /64 network to be sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
  • Major bugfixes (directory cache, performance, windows):
    • Limit the number of items in the consensus diff cache to 64 on Windows. We hope this will mitigate an issue where Windows relay operators reported Tor using 100% CPU, while we investigate better solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.

 

New Release: Tor Browser 10.5a7

by sysrqb | January 19, 2021

Tor Browser 10.5a7 is now available from the Tor Browser Alpha download page and also from our

The State of IPv6 support on the Tor network

by gaba | January 14, 2021

In our last article, published in

New Release: Tor Browser 10.0.8

by sysrqb | January 13, 2021

Tor Browser 10.0.8 is now available from the Tor Browser download page and also from our

© 2021 The Tor Project

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