ZABBIX 2.2.21rc2


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19 December 2017

Zabbix Team is pleased to announce the availability of Zabbix 2.2.21rc2 (Release Candidate).

Zabbix is an enterprise-class open source distributed monitoring solution. Zabbix is released under the GPL, thus it is free of charge for both commercial and non-commercial use. A complete text of the license is available at

This document contains the release notes for Zabbix 2.2.21rc2. Download it from

This release fixes known issues of Zabbix 2.2.x and introduces new minor features..

This release is not for production use. It is a Release Candidate!

The following sections describe the release in details and provide late-breaking or other information that supplements its main documentation.

What's New

:: New Features and Improvements

  • [ZBX-12825] implemented delayed URL validation; enabled user macros containing URLs as valid; made URL validation as optional; improved URL validation

:: Bug Fixes

  • [ZBX-13181] fixed database configuration error reporting and message filtering when messages are received from clear_messages function
  • [ZBX-13024] fixed parsing "request" parameter for URLs without input parameters
  • [ZBX-13024] fixed missed url search part in request login parameter
  • [ZBX-13044] fixed undefined index when setting strict-transport-security http header
  • [ZBX-13133] fixed multiple security issues
  • [ZBX-12854] fixed crash of VMware collector with DebugLevel=4

Installation and Upgrade Notes


See Zabbix Manual for full details.


Recompile Zabbix binaries and update front-end PHP files. Execute a database patch if migrating from Zabbix 1.8.x. See Zabbix Manual for a detailed upgrade procedure.

Commercial support

Zabbix Company provides a full range of professional services. We also provide trouble-free upgrade service for easy migration from earlier versions of Zabbix. Please contact Sales for pricing and more details.


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