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syslog-ng is an enhanced log daemon, supporting a wide range of input and output methods: syslog, unstructured text, queueing, SQL & NoSQL.
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Latest commit b34abe9 @bazsi bazsi Merge pull request #752 from dnsjts/support-system-librabbitmq-client
afamqp: support systemwide librabbitmq-c
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Mk syslog-ng: set OpenSSL as a hard dependency
contrib Merge pull request #757 from pasztor/f/syslog-debun
debian build: use non-recursive automake
doc ENABLE_MANPAGES should only affect manual pages
lib value-pairs: set token_start at the beginning of the loop in vp_walke…
libtest json: use the new utf8 sanitizer instead of another one
m4 java: check_java_version.m4 renamed to check_java_support
modules afamqp: support system librabbitmq-c
scl scl: add apache-accesslog-parser()
scripts escape glob to avoid weird behaviour when cwd contains .pdb files
syslog-ng-ctl config: prefix all HAVE_* and ENABLE_* defines with SYSLOG_NG_ prefix
syslog-ng config: rename PACKAGE to SYSLOG_NG_PACKAGE
tests config: rename PACKAGE to SYSLOG_NG_PACKAGE
tgz2build syslog-ng: set OpenSSL as a hard dependency
.gitignore warn the user if autoconf-archive is not installed
.gitmodules RabbitMQ submodule changed to the upstream. Relevant modifications ac…
.travis.yml travis: install autoconf-archive package
AUTHORS added implementation of new time related macros Move a block to the Patches section
COPYING Major copyright & license fixups
GPL.txt relicense syslog-ng to a combination of GPL/LGPL
INSTALL make dynamic linking the default
LGPL.txt Major copyright & license fixups Makefile: add distclean-local rule to remove generated config files Preparations for syslog-ng 3.7.2 Gitter integration added to syslog-ng to make it easier to
VERSION VERSION: bumped to 3.8.0alpha0 warn the user if autoconf-archive is not installed afamqp: support system librabbitmq-c added dist.conf and added automatic substitution of some dynamic vari…
requirements.txt requirements: add logilab-common as a dependency syslog-ng.pc: add eventlog as a required package Don't install the ChangeLog

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syslog-ng is an enhanced log daemon, supporting a wide range of input and output methods: syslog, unstructured text, message queues, databases (SQL and NoSQL alike) and more.

Key features:

  • receive and send RFC3164 and RFC5424 style syslog messages
  • work with any kind of unstructured data
  • receive and send JSON formatted messages
  • classify and structure logs with builtin parsers (csv-parser(), db-parser(), ...)
  • normalize, crunch and process logs as they flow through the system
  • hand on messages for further processing using message queues (like AMQP), files or databases (like PostgreSQL or MongoDB).


  • syslog-ng provides performance levels comparable to a large cluster while running on a single node.
  • In the simplest use-case it scales up 600-800k messages per second.
  • But classification, parsing and filtering still produces several tens of thousands messages per second.

Installation from Source

Releases are tagged in the github repository and tarballs ready to compile are made available at BalaBit's syslog-ng tarball repository.

To compile from source, the usual drill applies (assuming you have the required dependencies):

$ ./configure && make && make install

Some of the functionality is compiled only in case the required development libraries are present. The configure script displays a summary of enabled features at the end of its run.

Installation from Binaries

Binaries are available in various Linux distributions and contributors maintain packages of the latest and greatest syslog-ng version for various OSes.


Simply invoke the following command as root:

# apt-get install syslog-ng

Latest versions of syslog-ng are available for a wide range of Debian and Ubuntu releases and architectures from an unofficial repository.


syslog-ng is available as a Fedora package that you can install using yum:

# yum install syslog-ng


Binaries for other platforms might be available, please check out the official third party page for more information.

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