Deny Root Wildcard Subscriptions Extension

Security Extension

Purpose: Security
Version: 4.1.1    |   License: Apache v2
Provider: HiveMQ    |   Verified: yes


This extension denies any subscription to the root wildcard topic. In general, root wildcard subscribers tend to be a bottleneck in many scenarios.


  1. Unzip the downloaded zip file
  2. Copy the folder hivemq-deny-wildcard-extension to your [HIVEMQ_HOME]/extensions folder
  3. Done


No configuration needed, works out of the box.

First Steps

After the extension is installed, no client is allowed to subscribe to #, +/#, $share/group/# or any other topic filter that would represent a root wildcard.

Need help?

If you encounter any problems, we are happy to help. The best place to get in contact is our support.

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