Problems Android device - Charles Proxy - internet connection

Question

I am trying to get a Charles Log from an android device, and it is not working. The android device's browser will not connect to the internet after I set up the Wifi with the Proxy. I have listed the steps I did to set up Charles Proxy on my computer and configuring the android device to use charles proxy.

I am totally grateful for any help, but I just want to point out a couple of things:

*I have the correct the Wifi network & IP address for the Android device proxy settings ( see Step 18 below).

*As far as I know I do not use a VPN or a Firewall on the android device. How can I double check this?

*I have tried the steps below with 2 versions of Charles Proxy.
charles Proxy: 4.2.7
charles Proxy: 3.12.3 I removed and reinstalled the program each time.

*Chrome and Firefox on the android device will not connect to the internet with the proxy set up.

See the list below for the step and Thank you so much!!!

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System: MacOS 10.10.5 Android: 6.0.1

1. Menu: Proxy: ticked Mac OS proxy
2. Menu: Help > SSL proxying > Install Certificate
3. In Keychain > found certificate > clicked Always Trust (entered password)
4. In Charles Proxy, clicked Proxy menu
5. Menu > Proxy > SSL Proxying settings
6. Ticked Enable SSL Proxying
7. Clicked Add
8. Host * Port 443.
9. Menu: Proxy > Proxy Settings
10. Clicked Proxies Tab: Http Proxy Port: 8888
11. Ticked: Enable Transparent HTTP proxying
12. Clicked MacOSX tab
13. Ticked: Enable Mac OS Proxy, Use HTTP proxy, Enable MacOS proxy at start up
14. Clicked Mozilla Firefox tab: Enable Mozilla Firefox Proxy, Use HTTP proxy, Enable Mozilla Firefox proxy at startup.
15. Menu: Proxy > Access Control settings
16. Clicked add, set IP Range 0.0.0.0/0
17. Ticked: Prompt to allow unauthorized connection.
18. Menu > Help > Local IP address - Wrote this IP address down and used this number to set up android device.

On Android device:

19. Connect Android to Mac with USB cable. Port USB 2.0
20. Settings > Network & Internet > Wi-Fi
21. long-tapped active wifi connection, selected: Modify network
22. Expand the Advanced options, tapped at None below Proxy and selected Manual
23. Entered IP address from step 18 in the Proxy hostname field .
24. Entered 8888 into the Proxy portfield
25. Clicked Save.
26. Open Chrome
27. type http://charlesproxy.com/getssl/ or short version chls.pro/ssl
28. Get error message: “err_proxy_connection_failed” or "err_connection_timed_out" Please note: No dialog box appears on Charles Proxy on Mac about the Android device.
29. As far as I know I do not use VPN and I do not use a Firewall on the android device. How can I check this?

To manually add the security certificate to the Android device: 30: On Mac desktop – Charles Proxy > Menu Help > SSL Proxying > Save Certificate 31. Saved certificate to desktop. 32. Copied certificate to android device / downloads folder (not on SD card) via USB cable.

On android device: 33. Found charles proxy certificate file, long clicked.

34. In dialog box: renamed certificate Charles Proxy Certificate

35. Clicked VPN & Apps

36. Clicked save.

37. NB: Here I am not asked to re-enter my device PIN

38. Open Chrome App. Get the error message “err_proxy_connection_failed” or "err_connection_timed_out"

39. Android Device: notification that a third party might be watching.

40. I check if the certificate is installed: Settings > Security > Trusted Credentials > User > the XYZ Charles Proxy security certificate is installed.

I have also done Steps 30 to 38 with the certificate with a crt and a pem suffix.

I have tried the following variations: *Setting up the Proxy on Android device without USB connection to mac *Setting up the Proxy on Android device while connected to mac via USB *Setting up the proxy on Android device before opening Charles Proxy and after.

I have no idea what to try next! Hope you can help and thank you for reading this far. :)

Answer 1

I am using Charles Proxy with my windows machine. I have followed This blog for details

The steps can be concluded as follows.

• Download and install charles proxy for Mac/Windows laptop
• Make both your mobile device and laptop connected in same network
• Enable start recording in Charles
• Enable proxy in selected wifi network for mobile were laptop is also connected
• Give the details of IP given in Laptop Charles Help option> SSL Proxying > Install charles certificate on a mobile device or remote browser
• Make sure to give the same IP and 8888 port number
• Open mobile browser and browse http://chls.pro/ssl
• This should download and install charles certificate in mobile device
• In Laptop you can see notification of device trying to connect. Allow this as well
• Now you can see all network logs of your mobile device in Charles
• There is an extra configuration file needed to be included in OS 7+ devices , which is as follows

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network_security_config.xml content should be as follows

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <base-config cleartextTrafficPermitted="true">
        <trust-anchors>
            <certificates src="system" />
            <certificates src="user" />
        </trust-anchors>
    </base-config>
</network-security-config>