HAProxy - Load balancer
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Willy Tarreau 8badf5d2fa DOC: internals: add a threat model definition
Add doc/internals/threat-model.txt describing what does and does not
qualify as a security vulnerability in HAProxy so that reporters and
developers have a common understanding of the threat model, and make it
clear that anything non-critical should be handled in the open and
not hidden behind embargoes.

The document lists assets to protect, what constitutes an attack, what
are the mitigations in place, and the severity ordering of various
risks. This may in the long term also help developers make better
choices of default settings and option names, and may also justify
changing default settings over time when modern operating systems
bring new possibilities.

A section also lists some invariants and defaults in an attempt to
limit the risk of reporting theoretical issues that are technically
impossible to happen in the field.

This is an initial version meant to be refined as cases arise. It
was incrementally designed and cross-checked with the help of three
independent LLMs (Qwen, Gemini and Claude) until each correctly
classified a set of sample reports against it. In the current state
they do not raise any residual ambiguities anymore.
2026-05-31 20:28:08 +02:00
.github CI: github: add DEBUG_STRICT=2 to ASAN jobs 2026-04-30 17:46:30 +02:00
addons MINOR: addons/51degrees: handle memory allocation failures 2026-05-31 10:26:41 +02:00
admin CLEANUP: admin/halog: improve handling of memory allocation errors 2026-05-31 10:30:00 +02:00
dev CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
doc DOC: internals: add a threat model definition 2026-05-31 20:28:08 +02:00
examples MEDIUM: mux_quic: rename qmux traces to qcm 2026-05-13 16:23:58 +02:00
include MINOR: quic: Copy sin6_flowinfo and sin6_scope_id too 2026-05-29 15:36:47 +02:00
reg-tests REGTESTS: quic: disable quic/ocsp_auto_update for now 2026-05-28 18:49:47 +02:00
scripts SCRIPTS: announce-release: add a link to the OpenTelemetry filter 2026-05-08 12:05:09 +02:00
src CLEANUP: ncbmbuf: improve handling of memory allocation errors in unit tests 2026-05-31 10:29:49 +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-dev14 2026-05-26 21:56:40 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2025-04-02 11:12:20 +02:00
INSTALL DOC: update supported gcc and openssl versions in INSTALL 2026-05-20 17:45:23 +02:00
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 BUILD: Makefile: put EXTRA_MAKE help at the right place 2026-05-29 16:39:58 +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-dev14 2026-05-26 21:56:40 +02:00
VERSION [RELEASE] Released version 3.4-dev14 2026-05-26 21:56:40 +02:00

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.