CUCM Express 7.x - "TFTP Not Authorized" Error Message

Introduction

This document describes how to troubleshoot the TFTP Not Authorized error message in Cisco Unified Communications Manager Express.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

The information in this document is based on Cisco Unified Communications Manager Express 7.x.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

Refer to Cisco Technical Tips Conventions for more information on document conventions.

Problem

The TFTP Not Authorized error message appears on the IP phone screen when it tries to register with Cisco Unified Communications Manager Express.

Solution

A Cisco Unified Communications Manager Express security misconfiguration can cause this issue.

Complete these steps in order to resolve this issue:

1. Enter these commands under telephony-service:

   • cnf-file location flash:

   • no tftp-server-credentials trustpoint tftp-server

   • tftp-server-credentials trustpoint cme-server

2. Enter these commands under the specific ephone for which you want to register the security settings:

   • device-security-mode encrypted

   • cert-oper upgrade auth-mode null-string

3. Enter this command under ctl-client :

   • regenerate

4. Enter these commands under telephony-service :

   • no create cnf-files

   • create cnf-files

5. Delete the CTL file from the phone if it previously downloaded a different file.

6. From the IP phone, choose settings.

7. Press **# in order to unlock the phone.

8. Press more until you see the erase softkey.

9. Choose erase.

Related Information

• Cisco Unified Communications Manager Express Command Reference
• Voice Technology Support
• Voice and Unified Communications Product Support
• Technical Support & Documentation - Cisco Systems