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"ERR_HTTPS_INADEQUATE_TRANSPORT_SECURITY" error when accessing Kiwi NG Console

When accessing the Kiwi NG Console via HTTPS, the browser displays the error ERR_HTTPS_INADEQUATE_TRANSPORT_SECURITY.

First published date

9/14/2025 8:27 AM

Last published date

9/15/2025 4:01 PM

Overview

This error occurs because modern web browsers (such as Microsoft Edge, Chrome, or Firefox) detect that the web server is using outdated or insecure SSL/TLS protocols or ciphers that do not meet their minimum security requirements. By default, Kiwi NG uses HTTP/2, which may trigger this error if the server's TLS configuration is inadequate.

Product section

Kiwi Syslog Server

Cause

  • The Kiwi NG uses HTTP/2 by default.

Resolution

Important: Make a backup copy of appsettings.json before making any changes.

To resolve this issue, you can force Kiwi NG to use HTTP/1 instead of HTTP/2 by modifying the appsettings.json file located in the installation directory: C:\Program Files (x86)\SolarWinds\Kiwi Syslog Server NG\  

Before:

  "AllowedHosts": "*",
  "https_port": 5000

After changes:

  "AllowedHosts": "*",
   "Kestrel": {
      "EndpointDefaults": {
         "Protocols": "Http1"
      }
   },
  "https_port": 5000
Save the file and restart the Kiwi Syslog NG service to apply the changes.
After restarting, you should be able to access the Kiwi NG Console UI using Chrome or Edge without encountering the error.


To switch back to HTTP/2, edit the appsettings.json file again and replace:   with  then restart the service.