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Version 3.0.0 (Johann Georg Elser) released
Lorenz Kästle, June 16, 2026
The Monitoring Plugins Development Team finally announces version 3.0.0 of the Monitoring Plugins. Read more »
Version 3.0.0-rc4 released
Lorenz Kästle, June 8, 2026
The Monitoring Plugins Development Team announces version 3.0.0-rc4 of the Monitoring Plugins.
This is the fourth release candidate for version 3.0.0. Against all hopes rc3 was not good enough :-)
The most notable change compared to 3.0.0-rc3 is the change in the "summary" (the first line in the plugin output) of all the plugins with the new output functionality. It now contains either a topic specific OK message or (in the case of a non-OK state) the message from the worst-first failed subcheck.
Changes
- Changes/Features
- check_http and check_curl: custom timeout return state
- Error and OK summaries for the plugins with the new output functionality
-
check_ups: implement modern output
-
Fixes
- check_snmp: Put all privproto/authproto options into help
- check load: fix some inconsistencies mostly regarding the output text (Typos and such stuff)
Version 3.0.0-rc3 Released
Lorenz Kästle, April 13, 2026
The Monitoring Plugins Development Team announces version 3.0.0-rc3 of the Monitoring Plugins!
This is the third (and hopefully last) release candidate for version 3.0.0.
The Changes are mostly fixes added to rc2, with some exceptions (e.g. the
--proxy option for check_curl)
Changes
- Changes/Features
- check_real: implement modern output
- check_radius: Implement modern output
- OpenBSD: pledge(2) some network-facing checks
-
check_curl: add proxy argument and improve dns cache usage
-
Fixes
- Fix some minor compiler warnings
- Refactor check_ide_smart
- Compute numbers in output summary correctly
- check_icmp: prevent segfault on OpenBSD
- check_disk: compare inode thresholds against the correct value
- check_icmp: Populate progname before np_extra_opts call
- Make IPv6 unconditional
- Fix a few typos
- Make replacing of mismatching single quotes work
- Fix check_procs -T option
- check_curl: check certificates and exit before checking for curl_easy_perform result
- Remove troublesome symbols ("|") from output
- Update/gnulib 2026 03
- Handle rc_send_server in libfreeradius
- Revert check_disk performance data back to used space
- Add option to override output for check in lib for check_by_ssh
- common.h: added guard to avoid warning when ENABLE_NLS is not defined
- check_snmp: fixed falltrhough case in ASN_FLOAT/ASN_DOUBLE
- removed -Werror=declaration-after-statement from net-snmp-config --cf… by
- check_curl: Clean up
- added CHECK_EOF to work around warnings about EOF and -1 being the same
Version 3.0.0-rc2 Released
Lorenz Kästle, January 2, 2026
The Monitoring Plugins Development Team announces version 3.0.0-rc2 of the Monitoring Plugins!
This is the second release candidate for version 3.0.0.
It contains mostly fixes to the 3.0.0-rc1 version and is also not a full release, but serves as a basis for test until we are mostly sure not to break production setups.
Changes
- check_nt was removed check_nt is no long useful in current setups and hasn't been for some time. Therefore it was removed without a replacement.
- check_ntp was removed check_ntp was marked as deprecated for a long time due to systematic problems. It should not be in use anywhere and gets now removed to reduce code size and avoid misleading users. The replacements are check_ntp_time and check_ntp_peer
- Bugfix for check_ntp_time An errournous change in check_ntp_time made it fail in almost all use cases. This has been fixed
- Properly separate perfdata from different subchecks A missing separator caused errors in perfdata strings (from C plugins) where two different data points where not properly separated and showed up as a single invalid data point
- check_curl: append the query string from parsed uri
When using the old style follow method (
-f follow) with check_curl the query string was not appended to the new target after redirect. This was fixed. (Thanks Ahmet Oeztuerk) - Fixing different problems on OpenBSD A few different things did prevent proper compilation and usage on OpenBSD, partly due to different naming conventions there. These are hopefully fixed now. Thanks to Alvar Penning and Stuart Henderson.
- Gnulib update to stable-202507
Version 3.0.0-rc1 Released
Lorenz Kästle, December 3, 2025
The Monitoring Plugins Development Team announces version 3.0.0-rc1 of the Monitoring Plugins! This release is different in several regards to previous releases. Due the a significant refactoring and the unintented side effect this may have, the "real" release will be following release candidates which are intented to for early adapters and testing. Read more »
Monitoring Plugins Wins BlueHats Prize
Holger Weiß, December 30, 2024
As announced by the NLnet Foundation, the Monitoring Plugins team is the winner of the fourth 2024 BlueHats prize! Read more »
Version 2.4.0 Released
Jan Wagner, July 25, 2024
The Monitoring Plugins Development Team is proud to announce version 2.4.0 of the Monitoring Plugins! This release comes with various fixes provided by more than 12 contributors. Many thanks to all of you! Read more »
Version 2.3.5 Released
Jan Wagner, October 18, 2023
The Monitoring Plugins Development Team is proud to announce version 2.3.5 of the Monitoring Plugins! This release comes just with a small fix preventing the tarball from being built. Sorry for this. Read more »
Version 2.3.4 Released
Jan Wagner, October 18, 2023
The Monitoring Plugins Development Team is proud to announce version 2.3.4 of the Monitoring Plugins! This release comes with various fixes provided by more than 30 contributors. Many thanks to all of you! Read more »
Version 2.3.3 Released
Jan Wagner, February 2, 2023
The Monitoring Plugins Development Team is proud to announce version 2.3.3 of the Monitoring Plugins! This release comes with various fixes provided by more than 16 contributors. Many thanks to all of you! Read more »