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HAProxy - Load balancer
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Willy Tarreau bb5c18ab74 BUG/MEDIUM: resolvers: fix name compression pointer validation in resolv_read_name() 
The original DNS code would only use the 8 lower bits of the compression
offset. This was fixed in 2.0 with commit 2fa66c3b9 ("BUG/MEDIUM: dns:
overflowed dns name start position causing invalid dns error") but it was
not sufficient because the anti-loop check continues to use only 8 of the
14 bits, thus a crafted response where the 8 lower bits pass the check and
the 6 higher should fail it would be accepted. The impacts remains limited
thanks to the bounds check and the recursion limits, but such invalid
responses could still cost a lot to process. Let's compute the 14-bit
offset once for all and use it everywhere.
2026-05-15 15:33:14 +02:00
.github CI: github: add DEBUG_STRICT=2 to ASAN jobs 2026-04-30 17:46:30 +02:00
addons BUILD: 51d.c: cleanup, fix preprocessor ifdefs 2026-05-13 17:00:20 +02:00
admin CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
dev CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
doc [RELEASE] Released version 3.4-dev12 2026-05-13 17:22:12 +02:00
examples MEDIUM: mux_quic: rename qmux traces to qcm 2026-05-13 16:23:58 +02:00
include CLEANUP: htx: Adjust numbering of HTX blocks' types in the description 2026-05-13 17:03:48 +02:00
reg-tests MINOR: sample: add a reverse_dom converter 2026-05-13 16:49:53 +02:00
scripts SCRIPTS: announce-release: add a link to the OpenTelemetry filter 2026-05-08 12:05:09 +02:00
src BUG/MEDIUM: resolvers: fix name compression pointer validation in resolv_read_name() 2026-05-15 15:33:14 +02:00
tests TESTS: quic: add unit-tests for QUIC TX part 2025-09-08 14:49:03 +02:00
.cirrus.yml CI: cirrus-ci: bump FreeBSD image to 14-3 2025-10-09 14:06:48 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore MINOR: tevt/dev: Add term_events tool 2025-01-31 10:41:50 +01:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml MEDIUM: mworker: remove USE_SYSTEMD requirement for -Ws 2024-11-20 12:07:38 +01:00
BRANCHES CLEANUP: tree-wide: fix typos in user-invisible files 2026-05-13 17:03:48 +02:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 3.4-dev12 2026-05-13 17:22:12 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2025-04-02 11:12:20 +02:00
INSTALL MINOR: version: mention that it's development again 2025-11-26 16:11:47 +01:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS MAJOR: spoe: Let the SPOE back into the game 2024-05-22 09:04:38 +02:00
Makefile MINOR: mux_quic: rename qstrm files to qmux 2026-05-13 16:15:48 +02:00
README.md CI: github: add cross-zoo.yml in README.md 2026-04-20 11:47:20 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 3.4-dev12 2026-05-13 17:22:12 +02:00
VERSION [RELEASE] Released version 3.4-dev12 2026-05-13 17:22:12 +02:00

README.md

HAProxy

AWS-LC Illumos NetBSD CrossCompile FreeBSD VTest

HAProxy logo

HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.

Installation

The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.

Getting help

The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.

The issue tracker is only for bug reports or feature requests.

Documentation

The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.

Please refer to the following files depending on what you're looking for:

  • INSTALL for instructions on how to build and install HAProxy
  • BRANCHES to understand the project's life cycle and what version to use
  • LICENSE for the project's license
  • CONTRIBUTING for the process to follow to submit contributions

The more detailed documentation is located into the doc/ directory:

License

HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.