Naemon
Monitoring & MetricsA host/service/network monitoring program written in C, compatible with Nagios plugins
Features
- Monitors hosts, services, and network components
- Plugin interface fully compatible with Nagios
- Open‑source under the GNU General Public License
Recent releases
View all 3 releases →
v1.5.1
Breaking risk
Breaking changes
- Recompile any NEB (Nagios Event Broker) modules due to object structure changes.
Notable features
- Added 'check_timeout' attribute on host and service structs to override global check timeouts
Full changelog
1.5.1 - Mar 19 2026
Breaking changes:
- Due to object structure changes, it is recommended to recompile any NEB modules
Features:
- new attribute 'check_timeout' on
hostandservicestructs, overrides the global host / service check timeouts. (#525)
Bugfixes:
- fix memory corruption in
mkstrcaused by integer overflow (#527)
v1.5.0
Breaking risk
Breaking changes
- Object structure changes in `host` and `service` structs require recompilation of any NEB modules when upgrading to 1.5.0
Security fixes
- CVE-2016-9566 – fixed a theoretical root privilege escalation vulnerability in Naemon (which does not start as root by default)
Notable features
- Use timeval for last_update in host and service structs
- Improved eventloop runtime performance
Full changelog
1.5.0 - Feb 03 2026
Breaking changes:
- Due to object structure changes, it is recommended to recompile any NEB modules
when upgrading to 1.5.0
Features:
- use timeval for last_update - this affects the
hostandservicestructs and could be a breaking change for NEB module developers. (#516) - improve eventloop runtime performance (#519)
Changed:
- During startup, ensure downtimes are loaded before updating status (#502)
- rpm spec: add provides for user / group (#520)
- rpm: fix lto-no-text-in-archive (#515)
- rpm: do not install INSTALL file (#515)
- debian: remove obsolete dependency
Bugfixes:
- fix memory leak when using service parents (514)
- fix pending service dependencies (#509)
- skip over dependencies when the current time is not within the time period (#511)
- fix a theoretical root privilege escalation (CVE-2016-9566) as naemon does not start as root user by default (#507)
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Similar tools
Alternative to
Nagios