Software Update: Nagios 3.1.1

The Nagios program allows you to monitor different parts of the network and services on your servers. It can monitor smtp, pop3, http, and nntp services and resources such as processor load and disk usage, among others. When something happens that you want to be kept informed about, you can receive various notifications by mail or on your pager. For more information, we refer you to this page and a bunch of screenshots is up this page to watch. You can also read this topic on our forum. The developers have released a new version of Nagios with 3.1.1 as the version number. The announcement and list of changes look like this:

Nagios 3.1.1 Released

Nagios 3.1.1 has been released! Download it now from This latest release includes several important fixes and a potential security threat.

  • New “important check command” flag for use in service templates, to aid configuration in distributed environments
  • Fix for nagios validation error when no services defined
  • Fix for stylesheet link
  • Fix for extinfo.cgi error message when cgi.cfg doesn’t exist
  • Fix for notifications.cgi where Update button on right didn’t retain host information wh and no host= was in query parameters
  • Fix for potential bug where a contactgroup with no members could cause parsing errors
  • Fix for W3 validation for history.cgi
  • Fix for W3 validation for extinfo.cgi
  • Fix for nagiostats to return non-zero with failures in MRTG mode
  • Added t/ directory for tests. Use make test to run. Requires perl on development server
  • Fix for duplicate event_id attributes in status and retention data
  • Fix for duplicate unlink() during check processing
  • Added missing check period column to host config display (CGI)
  • Fix for embedded Perl initialization under FreeBSD
  • Fix for incorrect re-initialization of mutext after program restart
  • Fix for incorrect weighting in host flap detection logic
  • Added lib tap to distribution. Use ./configure –enable-libtap to compile
  • nagios.log permissions are now kept after log rotation
  • Fix for “Max concurrent service checks (X) has been reached” messages – will now push se rvices 5 + random(10) seconds ahead for retry
  • Fix for removing old HTML files for web frontend that are now replaced with PHP equivalent nts (index/main/side.html)
  • Fix for incorrect service history link text in CGIs
  • Fix for useless code loop in netutils.c
  • Fix for potential divide by zero in event scheduling code
  • Fix for trailing backslash in plugin output causing memory corruption in CGIs
  • Fix for bug that could affect host/service scheduling during clock time skew or changes to timeperod definitions between restarts
  • Leading whitespace from continuation lines in configuration files is now stripped out
  • Fix for bug where pipe (used by IPC) file descriptors get inherited by child processed ( eg event handlers) (bug #0000026)
  • Fix for failure to daemonize – Nagios now bails (bug #0000011)
  • Fix for notifications about flapping starting not processed properly by retention data
  • Patch to add transparency to statusmap icons for truecolor images
  • Patch to add read-only permissions to extinfo CGI
  • Security fix for statuswml.cgi where arbitrary shell injection was possible

Version number 3.1.1
Release status Final
Operating systems Linux, BSD, macOS, Solaris, UNIX
Website Nagios
License type GPL