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Code42 Support

RADIUS connection problem

Applies to:
  • Code42 CrashPlan (previously CrashPlan PROe)


This article explains how to interpret and respond to the following alert.

The table below displays where the alert appears and where it can be configured.

Alert Text Location
"Problem with connection to RADIUS server: server name" Email and Alerts Overview of the administration console
"RADIUS connection problem" Settings > Notifications of the administration console


Warning - although this alert indicates a serious issue that should be addressed, it does not pose an immediate risk of data loss, security breach, or service interruption. If the problem is not corrected, however, more severe problems could occur.


This alert is triggered when a master server is unable to connect to the configured RADIUS server. The alert provides the hostname or IP address of the affected RADIUS server.

Possible effects

  • Users unable to authenticate via RADIUS
  • Users unable to backup or restore

Before you begin

You should have an understanding of the RADIUS networking protocol.

Recommended solution

To resolve this alert:

  • Go to Settings > Security > RADIUS and validate the RADIUS server settings
  • Verify that the RADIUS server is powered on
  • Verify that the RADIUS server is reachable from the command line of the master server
  • Confirm that the RADIUS server responds on the configured port using telnet and ping

Acknowledge the alert

The alert will continue to appear on the Alerts Overview in the administration console until you acknowledge the alert. To acknowledge the alert, go to Alerts, select the alerts you want to acknowledge, and choose Acknowledge from the action menu.