- syslog-ng - lists.balabit.hu

Plans for next release?
by David Tosovic 19 Jan '26

19 Jan '26

Hi all, I'm currently building syslog-ng from source as I'm utilizing some recent changes that are not in 4.10.2. I'm wondering if the next release is scheduled soon? Thanks, David

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iptables.log
by A 28 Dec '25

28 Dec '25

How to exclude such lines from logging? IN=net0 OUT= SRC=xxx.xxx.xxx.xxx DST=xxx.xxx.xxx.xxx LEN=xx TOS=0xxx PREC=0xxx TTL=xx ID=xxxx DF PROTO=xxx SPT=xxxx DPT=137 WINDOW=xxxxx RES=0xxx XXX URGP=X --

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The syslog-ng Insider 2025-12: logrotation; release RPM; nightly RPM
by Peter Czanik (pczanik) 11 Dec '25

11 Dec '25

Dear syslog-ng users, This is the 136th issue of syslog-ng Insider, a monthly newsletter that brings you syslog-ng-related news. NEWS File size-based log rotation in syslog-ng ----------------------------------------- Version 4.10 of syslog-ng introduced file size-based log rotation. Thanks to this, storage space is no longer filled with logs with the risk that you might not see older logs if the message rate is higher than expected. https://www.syslog-ng.com/community/b/blog/posts/file-size-based-log-rotati… Syslog-ng release packages for RHEL & Co. ----------------------------------------- I’ve been providing syslog-ng users release RPM packages for almost a decade now. However, from now on, RHEL & Co users can use packages provided directly by the syslog-ng team from a lot less obscure location. https://www.syslog-ng.com/community/b/blog/posts/syslog-ng-release-packages… Nightly syslog-ng RPM packages for RHEL & Co. --------------------------------------------- I have been providing syslog-ng users with weekly git snapshot RPM packages for almost a decade. From now on, RHEL & Co users can use nightly packages provided by the syslog-ng team, and from a lot less obscure location. As usual, these packages are for testing, not for production. https://www.syslog-ng.com/community/b/blog/posts/nightly-syslog-ng-rpm-pack… WEBINARS * You can learn about upcoming webinars and browse recordings of past webinars at https://www.syslog-ng.com/events/ Your feedback and news, or tips about the next issue are welcome. To read this newsletter online, visit: https://syslog-ng.com/blog/ Peter Czanik (CzP) <peter.czanik(a)oneidentity.com> Balabit (a OneIdentity company) / syslog-ng upstream https://syslog-ng.com/community/ https://twitter.com/PCzanik

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Version 4.10.2 of syslog-ng is now available
by Peter Czanik (pczanik) 26 Nov '25

26 Nov '25

Hi, Version 4.10.2 of syslog-ng is now available. It's yet another bug fix release for 4.10 and fixes a number of problems reported after the release. If you use the webhook source, start syslog-ng directly from scripts or check stats values on a system with disk buffer, you should upgrade to 4.10.2. Otherwise, your current version should be OK. Peter 4.10.2 syslog-ng provides RPM<https://github.com/syslog-ng/syslog-ng#rhel> and DEB<https://github.com/syslog-ng/syslog-ng#debianubuntu> package repositories for Ubuntu, Debian, and RHEL, for both amd64 and arm64 architectures. We also provide ready-to-test binaries in Docker containers<https://hub.docker.com/r/balabit/syslog-ng/tags> based on the current stable Debian image. For more details, visit our Documentation Center<https://syslog-ng.github.io/> Version 4.10.2 is a bugfix release, and resolves the following issues. Bugfixes * Queued stats values of destinations could still contain weird values. (#5527<https://github.com/syslog-ng/syslog-ng/pull/5527>) * Unclosed standard file handlers could cause a hang when syslog-ng was started as a daemon. (#5532<https://github.com/syslog-ng/syslog-ng/pull/5532>) * The WebHook Python module could hang syslog-ng when started by systemd and systemctl stop syslog-ng was requested. (#5522<https://github.com/syslog-ng/syslog-ng/pull/5522>) * Our installer packages now include static index web pages and are browsable via RPM<https://ose-repo.syslog-ng.com/yum/> and DEB<https://ose-repo.syslog-ng.com/apt/>. (#5517<https://github.com/syslog-ng/syslog-ng/pull/5517>, #5518<https://github.com/syslog-ng/syslog-ng/pull/5518>, #5520<https://github.com/syslog-ng/syslog-ng/pull/5520>) Credits syslog-ng is developed as a community project, and as such it relies on volunteers, to do the work necessarily to produce syslog-ng. Reporting bugs, testing changes, writing code or simply providing feedback are all important contributions, so please if you are a user of syslog-ng, contribute. We would like to thank the following people for their contribution: Vivek Anand, Hofi, gotyaoi, Kovacs Gergo Ferenc, Tamas Pal, Tinkiter — This release has 3 assets: * syslog-ng-4.10.2.tar.gz * Source code (zip) * Source code (tar.gz) Visit the release page<https://github.com/syslog-ng/syslog-ng/releases/tag/syslog-ng-4.10.2> to download them. Peter Czanik (CzP) <peter.czanik(a)oneidentity.com> Balabit (a OneIdentity company) / syslog-ng upstream https://syslog-ng.com/community/ https://twitter.com/PCzanik

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issues with syslog facility "overflowing" to user facility?
by Ian Veach 19 Nov '25

19 Nov '25

Hi all - We're seeing some weird behavior on our central loghosts. Could be config, I suppose, but it seems unusual and I don't see config issue causing it. The summary is that we are using stats and dumping them into syslog.log, and that's fine. But we see weird "remnants" in user.log. It seems to contain syslog facility messages and is malformed as well. Bug? Or us? 🙂 This is a snip of the expected syslog.log: 2025-11-19T00:00:03.392632-08:00 redacted [syslog.info] syslog-ng[758325]: Log statistics; msg_size_avg='dst.file(d_log#0,/var/log/other/20251110/daemon.log)=111', truncated_bytes='dst.file(d_log#0,/var/log/other/20251006/daemon.log)=0', truncated_bytes='dst.file(d_log_systems#0,/var/log/other/20251002/syste..... This is a snip of user.log (same event/time looks like): 2025-11-19T00:00:03.392632-08:00 redacted [user.notice] var/log/other/20251022/daemon.log)=111',[]: eps_last_24h='dst.file(d_log#0,/var/log/other/20251022/daemon.log)=0', eps_last_1h='dst.file(d_log#0,/var/log/other/20250922/daemon.log)=0', eps_last_24h='dst.file(d_log#0,/var/log/other/20250922/daemon.log)=0',...... Here you can see for user.log that the format is actually messed up. $PROGRAM[$PID]: is missing/truncated (although look at the []: at the end of the first line), and the first part of the $MESSAGE is also missing/truncated. Some notes: * We're running syslog-ng as provided by Red Hat (syslog-ng-3.35.1-7.el9.x86_64) * endpoint is logging correctly (nothing in user.log). This is only centralized loghosts that we see this. * Stats level 1, freq 21600 Relevant configuration snips: log { source(s_local); source(s_net_unix_tcp); source(s_net_unix_udp); filter(f_catchall); destination(d_arc); }; filter f_catchall { not facility(local0, local1, local2, local3, local4, local5, local6, local7); }; destination d_arc { file("`LPTH`/$HOST_FROM/$YEAR/$MONTH/$DAY/$FACILITY.log" template(t_std) ); }; t_std: template("${ISODATE} $HOST_FROM [$FACILITY.$LEVEL] $PROGRAM[$PID]: $MESSAGE\n"); Thanks for any guidance! PUBLIC RECORDS NOTICE: In accordance with NRS Chapter 239, this email and responses, unless otherwise made confidential by law, may be subject to the Nevada Public Records laws and may be disclosed to the public upon request.

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yum repository not browsable
by Evan Rempel 31 Oct '25

31 Oct '25

From time to time we have some challenge with the installation of packages from a repository. To troubleshoot the issue we usually use a web browser to brows the repository to "see what is there" and to download and inspect individual packages to determine signing and dependencies. The repository at ose-repo.syslog-ng.com is not browsable. https://ose-repo.syslog-ng.com/yum/stable/ results in a 404 error. Can the repository be changed to allow it to be browsed? Is there some reason to disallow browsing that escapes me? -- Evan

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Beware Debian 13 syslog-ng stats setting
by John Kristoff 28 Oct '25

28 Oct '25

If you use Debian's packaged syslog-ng beware that you may have this set in your Debian 13 /etc/syslog-ng/syslog-ng.conf: stats(freq(1)); This was briefly introduced and then removed. You probably don't want it if you have it - daemon stats would be logged every second. Debian does not install syslog-ng by default and many may be installing packages from elsewhere or from source, so hopefully this does not have a wide impact. Where it was added: <https://github.com/gcsideal/syslog-ng-debian/commit/319fd669944def7dbb1bc50…> Where it was removed: <https://github.com/gcsideal/syslog-ng-debian/commit/f7ee172d62009cc6b5e6a62…> John

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The syslog-ng Insider 2025-10: values; BastilleBSD; Debian
by Peter Czanik (pczanik) 09 Oct '25

09 Oct '25

Dear syslog-ng users, This is the 135th issue of syslog-ng Insider, a monthly newsletter that brings you syslog-ng-related news. NEWS The core values of syslog-ng ---------------------------- Whenever I present syslog-ng at a conference or I stand next to a booth, people often ask me why should they use syslog-ng instead of one of its competitors. So let me summarize what the users and developers of syslog-ng typically consider as its most important values. https://www.syslog-ng.com/community/b/blog/posts/the-core-values-of-syslog-… Running syslog-ng in BastilleBSD -------------------------------- Bastille, the lightweight jail (container) management system for FreeBSD, was already covered here. Recently, they released Bastille 1.0 and BastilleBSD, a hardened FreeBSD variant that comes with Bastille pre-installed. https://www.syslog-ng.com/community/b/blog/posts/running-syslog-ng-in-basti… Debian and Ubuntu blogs updated ------------------------------- Recent Debian and Ubuntu releases changed, how gpg keys of repositories can be added to a sytem. Related blogs are now updated: https://www.syslog-ng.com/community/b/blog/posts/nightly-syslog-ng-builds-f… https://www.syslog-ng.com/community/b/blog/posts/installing-the-latest-sysl… WEBINARS * You can learn about upcoming webinars and browse recordings of past webinars at https://www.syslog-ng.com/events/ Your feedback and news, or tips about the next issue are welcome. To read this newsletter online, visit: https://syslog-ng.com/blog/ Peter Czanik (CzP) <peter.czanik(a)oneidentity.com> Balabit (a OneIdentity company) / syslog-ng upstream https://syslog-ng.com/community/ https://twitter.com/PCzanik

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stats collection sometimes wrong
by Evan Rempel 08 Oct '25

08 Oct '25

We collect stats every 10 minutes via the command syslog-ng-ctl stats --control=$syslogSocket And we log the results back to syslog as well as generate alerts when things start queuing. Sometimes the queued numbers reported are extremely incorrect. 2025-09-16T21:15:12 host syslog.info syslog-ng-stats[94472]: statistics: syslogserver;dst.file;d_authorized_unknown#0;/var/syslog/unknown/telegraf.unknown.20250916.000000;a;queued;0 2025-09-16T21:25:12 host syslog.info syslog-ng-stats[94472]: statistics: syslogserver;dst.file;d_authorized_unknown#0;/var/syslog/unknown/telegraf.unknown.20250916.000000;a;queued;0 2025-09-16T21:35:12 host syslog.info syslog-ng-stats[94472]: statistics: syslogserver;dst.file;d_authorized_unknown#0;/var/syslog/unknown/telegraf.unknown.20250916.000000;a;queued;0 2025-09-16T21:35:12 host syslog.info syslog-ng-stats[94472]: statistics: syslogserver;dst.file;d_authorized_unknown#0;/var/syslog/unknown/telegraf.unknown.20250916.000000;a;processed;15568 2025-09-16T21:45:12 host syslog.info syslog-ng-stats[94472]: statistics: syslogserver;dst.file;d_authorized_unknown#0;/var/syslog/unknown/telegraf.unknown.20250916.000000;a;queued;18446744073709551608 2025-09-16T21:45:12 host syslog.info syslog-ng-stats[94472]: statistics: syslogserver;dst.file;d_authorized_unknown#0;/var/syslog/unknown/telegraf.unknown.20250916.000000;a;processed;15773 2025-09-16T21:55:12 host syslog.info syslog-ng-stats[94472]: statistics: syslogserver;dst.file;d_authorized_unknown#0;/var/syslog/unknown/telegraf.unknown.20250916.000000;a;queued;18446744073709551608 2025-09-16T21:55:12 host syslog.info syslog-ng-stats[94472]: statistics: syslogserver;dst.file;d_authorized_unknown#0;/var/syslog/unknown/telegraf.unknown.20250916.000000;a;processed;15972 2025-09-16T22:05:12 host syslog.info syslog-ng-stats[94472]: statistics: syslogserver;dst.file;d_authorized_unknown#0;/var/syslog/unknown/telegraf.unknown.20250916.000000;a;queued;0 2025-09-16T22:15:12 host syslog.info syslog-ng-stats[94472]: statistics: syslogserver;dst.file;d_authorized_unknown#0;/var/syslog/unknown/telegraf.unknown.20250916.000000;a;queued;0 It is not possible to queue more messages that the difference reported in the processed numbers. -- Evan

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Version 4.10.1 of syslog-ng now available
by Peter Czanik (pczanik) 01 Oct '25

01 Oct '25

Hi, Version 4.10.1 is a bugfix release, not needed by most users. It fixes the syslog-ng container and platform support in some less common situations. Before you begin I assume that most people are lazy and/or overbooked, just like me. So, if you already have syslog-ng 4.10.0 up and running, and packaged for your platform, just skip this bugfix release. What is fixed? • You can now compile syslog-ng on FreeBSD 15 again. • The syslog-ng container has Python support working again. • Stackdump support compiles only on glibc Linux systems, but it also used to be enabled on others when libunwind was present. This problem affected embedded Linux systems using alternative libc implementations like OpenWRT and Gentoo in some cases. It is now turned off by default, therefore it needs to be explicitly enabled. What is next? If you are switching to 4.10.X now, using 4.10.1 might spare you some extra debugging. Especially if you are developing for an embedded system. Peter Peter Czanik (CzP) <peter.czanik(a)oneidentity.com> Balabit (a OneIdentity company) / syslog-ng upstream https://syslog-ng.com/community/ https://twitter.com/PCzanik

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