Configure Charles Proxy to Capture HTTPS Traffic Using Mac

Introduction

This document describes the procedure used in order to capture HTTPS (Hyper Text Transfer Protocol Secure) traffic with the Macintosh(Mac) program Charles proxy.

Prerequisites

Requirements

Cisco recommends that you have knowledge of Apple OS X.

Components Used

The information in this document is based on the Charles application available from the author's source.

The information in this document is based on Apple OS 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, ensure that you understand the potential impact of any command.

Background Information

This would be essential for troubleshooting Single Sign-On (SSO) traffic which cannot be captured with normal network traffic tools.

Configure

Step 1. Download Charles proxy and then install Charles - Download Charles Web Debugging Proxy Application

Step 2. Open Charles

Step 3. Navigate to Proxy > select MAC OS X Proxy

Step 4. Navigate to Proxy > Proxy Settings > enable Use a dynamic port

Step 5. Navigate to Help > SSL Proxying > Install Charles Root Certificate

Step 6. The Charles Proxy certificate will be installed under login, but move it to System keystore

Step 7. Input site URL in browser and then Charles will capture the logs with the site information.

Step 8. Right click the site URL http://cisco.webex.com and then select Enable SSL Proxying

Step 9. Select Proxy > SSL Proxying Settings > Verify you see this image 

Charles will now begin to capture the HTTPS traffic for the site URL. In order to capture other site URL, repeat steps 7, 8, 9 and ensure the URL is added to the SSL Proxying.

Related Information

• Charles Proxy