Frequently Asked Questions

Troubleshooting Common Mistakes in Single-Server Installs

This article highlights common configuration mistakes during single-server installations. These are small steps that may have been missed in a basic install. If you are looking for more in-depth troubleshooting guides, including guides for special features like Autoscaling, please see our full Troubleshooting Guide FAQ.

To avoid small mistakes during single-server installs, please make sure that you have done the following:


Open all required ports.


Run the latest version of the server and/or SDKs (it may have a fix for the issue you are seeing!)


Make sure you have allocated enough memory to the JVM.

Network (for local testing)

If you are running Red5 Pro locally, all your devices need to be on the same network.


If you have a custom build or preview build of the Red5 Pro server, check that your License Key is present in the server. This only applies to custom or preview build scenarios. When downloading the server from the Accounts page, your license key should already be entered.

If you are using our Mobile SDK, you will need to insert your SDK License into the application as per the following documentation.


Install all required software dependencies for your server OS:

Ubuntu Linux

  • We recommend and support Ubuntu 20.04 at this time. (As of July 2021).
  • As of release version 9.0.0, Red5 Pro requires Java version 11.
    • There are also several libraries that must be installed. Please find more information at Red5 Pro’s Ubuntu Linux Install documentation.
    • Please see this document if you are installing a version prior to 9.0.0.


  • Release 9.0.0 can not be run on CentOS. Please continue to use version 8.x of the Red5 Pro Server if you are using CentOS.


  • Install Microsoft Visual Studios redistributables if you don’t have Visual Studio on your machine.
    • Download and install Java SE Development Kit 11.0.1. After installing java, add a new system variable for JAVA_HOME. Find the installation folder for your Java installation, then go to System Properties, Advanced System Settings, Environment Variables. Under System variables, click on New....
      • Variable name: JAVA_HOME
      • Variable path: (will be something like) C:\Program Files\Java\jdk-11.0.11

Published 6/21/2022 MD