Upgrade Attempts to 8.9+ Without .Net 4.8 Causes 404 Error on Assets > Computers

Products

• Carbon Black App Control (formerly Cb Protection)

Issue/Introduction

• Upgrade from prior version (8.8.x and below) to 8.9.x fails because .Net 4.8 is missing
• After failed attempt, Assets > Computers gives 404 Error Stating:
  • Requested URL: https://<servername>:443/computers.php
  • Physical Path: C:\Program Files (x86)\Bit9\Parity Console\WebUI\html\Computers.php
• Computers.php does not exist in html\computers.php

Environment

• App Control Server: 8.9.x+

Cause

Improper installer logic causes a redirect to be created even though computers.php does not yet exists (in 8.9 we renamed hosts.php to computers.php)

Resolution

There are two ways to correct this

Option I: Install .NET Runtime

Install .NET Runtime Version 4.8 and then re-attempt the upgrade

 

Option II: Rename Computers or Hosts page accordingly

1. Log in to the application server as the Carbon Black Service Account.
   • If an Agent is installed on the server, temporarily stop and unload Agent
2. Launch Services (services.msc) and temporarily stop the following services:
   • Carbon Black App Control Reporter
   • Carbon Black App Control Server
3. In File Explorer navigate to the Parity Console\WebUI\html\ directory, by default:

   C:\Program Files (x86)\Bit9\Parity Console\WebUI\html\

4. Locate the relevant hosts file (typically there would be only one option) and create a backup. Examples:

   C:\Program Files (x86)\Bit9\Parity Console\WebUI\html\hostsOld.php
   C:\Program Files (x86)\Bit9\Parity Console\WebUI\html\hosts.php
   
   Copy in place and rename accordingly:
   C:\Program Files (x86)\Bit9\Parity Console\WebUI\html\hostsOld-backup.php
   C:\Program Files (x86)\Bit9\Parity Console\WebUI\html\hosts-backup.php
   

5. Rename the original hosts file (typically there would be only one option) to Computers.php. Examples:

   C:\Program Files (x86)\Bit9\Parity Console\WebUI\html\hostsOld.php
   C:\Program Files (x86)\Bit9\Parity Console\WebUI\html\hosts.php
   
   Rename the relevant file found to match:
   C:\Program Files (x86)\Bit9\Parity Console\WebUI\html\Computers.php

6. From an administrative command prompt issue the command: iisreset
7. Start the Reporter and Server services.
8. Log in to the Console and verify Assets > Computers loads properly.
9. If an Agent was temporarily stopped, load and start the service again.