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David Goulet cda7acb35d relay: Don't make DNS timeout trigger an overload 
Tor has configure libevent to attempt up to 3 times a DNS query for a
maximum of 5 seconds each. Once that 5 seconds has elapsed, it consider
the query "Timed Out" but tor only gets a timeout if all 3 attempts have
failed.

For example, using Unbound, it has a much higher threshold of timeout.
It is well defined in
https://www.nlnetlabs.nl/documentation/unbound/info-timeout/ and has
some complexity to it. But the gist is that if it times out, it will be
much more than 5 seconds.

And so the Tor DNS timeouts are more of a "UX issue" rather than a
"network issue". For this reason, we are removing this metric from the
overload general signal.

See https://gitlab.torproject.org/tpo/network-health/team/-/issues/139
for more information.

Fixes #40527

Signed-off-by: David Goulet <dgoulet@torproject.org>
2021-12-13 10:47:46 -05:00
.gitlab/issue_templates Remove Proposal.md. 2021-02-12 20:39:48 +00:00
changes relay: Don't make DNS timeout trigger an overload 2021-12-13 10:47:46 -05:00
contrib version: Missing version update in couple files 2021-10-28 09:41:56 -04:00
doc Merge branch 'maint-0.4.5' into maint-0.4.6 2021-11-03 09:53:31 -04:00
m4 Add the compiler name, version and libs used to compile 2020-11-17 10:43:00 +01:00
scripts shellcheck: Remove unused variable in ci-driver.sh 2021-11-03 09:54:09 -04:00
src relay: Don't make DNS timeout trigger an overload 2021-12-13 10:47:46 -05:00
.appveyor.yml CI: Remove VS2015 AppVeyor build 2020-08-12 14:09:32 +03:00
.clang-format Add a dire warning about not reformatting the whole codebase yet. 2020-02-12 18:52:35 -05:00
.editorconfig Add .editorconfig to follow coding standards style 2018-06-17 19:24:40 -04:00
.gitignore Merge branch 'maint-0.4.4' into maint-0.4.5 2021-01-21 16:18:43 -05:00
.gitlab-ci.yml Merge branch 'maint-0.3.5' into maint-0.4.5 2021-11-05 03:10:28 +00:00
.gitmodules Update the .gitmodules to refer to project-level tor-rust-dependencies 2018-02-21 11:53:04 -05:00
.travis.yml Add test for torrc %include functionality and seccomp sandbox 2020-07-15 22:01:08 +01:00
acinclude.m4 m4: Change LIBS order of TOR_SEARCH_LIBRARY() 2021-01-13 09:52:10 -05:00
autogen.sh Cleanup shellcheck warnings in autogen.sh 2019-01-18 13:49:30 +02:00
ChangeLog two more changelog fixes from arma 2021-04-14 15:22:26 -04:00
CODE_OF_CONDUCT Add CODE_OF_CONDUCT file 2018-07-05 11:22:33 +03:00
config.rust.in Make the rust tests link. 2018-07-31 19:46:00 -04:00
configure.ac Merge branch 'maint-0.4.5' into maint-0.4.6 2021-11-08 14:16:19 +00:00
CONTRIBUTING Add CODE_OF_CONDUCT file 2018-07-05 11:22:33 +03:00
Doxyfile.in Add correct exclusions to Doxyfile.in. 2020-07-07 10:24:24 -04:00
INSTALL Remove old instructions from INSTALL 2018-07-03 16:34:52 +03:00
LICENSE Merge branch 'maint-0.3.5' into maint-0.4.4 2021-03-12 11:36:34 -05:00
Makefile.am makefile: Add a reproducible dist make job 2021-10-28 16:29:37 -04:00
Makefile.nmake Clean up the MVSC nmake files so they work again. 2014-09-09 10:27:05 -04:00
README Use correct URL for CoreTorReleases in README. 2020-08-11 18:43:33 -04:00
ReleaseNotes Copy forward ReleaseNotes and ChangeLogs for today's releases 2021-03-16 08:31:22 -04:00
warning_flags.in Try @warning_flags to avoid bloating verbose make logs 2018-12-21 10:00:23 -05:00

README 

Tor protects your privacy on the internet by hiding the connection
between your Internet address and the services you use. We believe Tor
is reasonably secure, but please ensure you read the instructions and
configure it properly.

To build Tor from source:
        ./configure && make && make install

To build Tor from a just-cloned git repository:
        sh autogen.sh && ./configure && make && make install

Home page:
        https://www.torproject.org/

Download new versions:
        https://www.torproject.org/download/download.html

Documentation, including links to installation and setup instructions:
        https://www.torproject.org/docs/documentation.html

Making applications work with Tor:
        https://gitlab.torproject.org/legacy/trac/-/wikis/doc/TorifyHOWTO

Frequently Asked Questions:
        https://www.torproject.org/docs/faq.html

Release timeline:
        https://gitlab.torproject.org/tpo/core/team/-/wikis/NetworkTeam/CoreTorReleases

To get started working on Tor development:
        See the doc/HACKING directory.