Contents

Introduction

Background Information

Verify Protection is Enabled

Collect Logs

Console Logs

Network Logs

Packet Capture

Chrome OS net-export Log

Related Articles

Introduction

This document describes how to collect information and logs to assist the Cisco support team in troubleshooting Cisco Secure Client for Chromebook.

Background Information

Cisco Secure Client for Chromebook was formerly known as Umbrella Chromebook Client. Before collecting logs, ensure Cisco Secure Client for Chromebook is installed and enabled correctly. Complete preliminary checklist items to enhance troubleshooting efficiency with logs and packet captures for network-related scenarios.

Verify Protection is Enabled

1. To verify the resolved DoH template on the Chromebook, go to Settings > Security and Privacy, in the Use secure DNS section there is an entry with the email address of the user after https://doh.umbrella.com/identity.
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2. Navigate to https://policy-debug.checkumbrella.com to view the policy details. Please note that Umbrella root certificate needs to be installed for the information to be displayed.
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3. Check and confirm the Cisco Secure Client for Chromebook is successfully installed. This can be verified from chrome://extensions. The status of protection can be viewed by hovering the pointer to the extension icon.
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4. Check and confirm that the clock on the Chromebook device is correctly synchronized with trusted time source. Unsynchronized clock potentially puts the Chromebook into incorrect protection state, such as Fail Open or Fail Close.

5. Check and verify if the user policies in chrome://policy page match the policy and salt value set in Umbrella dashboard.
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Collect Logs

Collecting certain types of logs/traces for analysis during troubleshooting.

Console Logs

1. Click on the 3-dot option button on the top-right hand side of the browser window to bring up the overflow menu.

2. Select More tools > Developer tools to bring up the console, or press Ctrl-Shift-I.
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3. Select the Console tab and check the Preserve log option.

4. Reproduce the issue by visiting the site and logs appear on console window.

5. Right-click on any logs and an option to save the log appears.
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Network Logs

1. Click on the 3-dot option button on the top-right hand side of the browser window to bring up the overflow menu.

2. Select More tools > Developer tools to bring up the console, or press Ctrl-Shift-I.

3. Select the Network tab and check the Preserve log option.

4. Use the Clear log and Start/Stop log buttons to clear the logs and to start/stop log recording during issue reproduction.

5. Right-click on any of the entries to bring up the option to Save as HAR with Content.
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Packet Capture

1. Open Crosh from Chromebook by pressing Ctrl-Alt-T or search Crosh from Launcher.
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2. Run connectivity show devices to list the network interface to run the packet capture.
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3. Run packet_capture --device [network device name] to start packet capture.

4. To stop packet capture, type Ctrl-C or click Stop in the notification. The packet capture file is saved in the Downloads folder.
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Chrome OS net-export Log

1. Close all Chrome windows and tabs, it is very important there are no additional Chrome windows or tabs open when gathering the export logs for troubleshooting.

2. Clear the DNS Cache, go to chrome://net-internals/#dns and click on Clear host cache button.
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3. Open an incognito tab to avoid caching and cookies from other pages and go to the URL chrome://net-export/.
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4. Click on Start Logging to the Disk button in Chrome.

5. Browse to the problematic web page in a new incognito browser tab and reproduce the issue.

6. Click on Stop Logging in the chrome://net-export/ tab after reproducing the issue and click on Show File to locate the captured log.
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Related Articles

- Umbrella Chromebook Client(UCC) - Enable Developer mode of Chrome browser

- How To: Obtain diagnostic logs from Umbrella Chromebook Client

- How To: Obtain diagnostic logs from Umbrella Chromebook (SWG) Client