Not capturing... in Fiddler Everywhere Mac

Rainier

13 posts

Member since:
Feb 2015

Posted 16 Feb 2019 Link to this post

Hi, we're trying Fiddler everywhere on OSX Mojave, as a replacement to Charles, and it seemed to work when first installed as I got the password prompt, but upon relaunch it now no longer prompts for a password. Clicking the 'Capture button also does nothing.

Any ideas?

Thanks

Rainier

13 posts

Member since:
Feb 2015

Posted 16 Feb 2019 in reply to Rainier Link to this post

I should have mentioned I've also tried to launch fiddler with:

sudo /Applications/Progress\ Telerik\ Fiddler.app/Contents/MacOS/Progress\ Telerik\ Fiddler

Dimitar

Admin

41 posts

Posted 22 Feb 2019 Link to this post

Hi Rainier,

I have a couple of questions I need to ask you in order to have clearer understanding of what the described scenario is.

1. Fiddler starts without prompting you for a password. Do you eventually get the password prompt after clicking the capture button?
2. Does the issue persist when opening Fiddler at a later time? ( either from terminal or by clicking the Fiddler icon )

If this issue persists, it will be very helpful if you send us Fiddler's logs folder ( located in %temp%/Progress Telerik Fiddler/Logs ) to help us narrow down what the problem is caused by.

Regards,
Dimitar
Progress Telerik

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Rainier

13 posts

Member since:
Feb 2015

Posted 22 Feb 2019 in reply to Dimitar Link to this post

Hey!

1. I only ever saw the password prompt once, upon first launch and enabling of capture. It's never prompted me again, despite having launched Fiddler countless times and also clicking the 'Capture button as many times too. Note that clicking the 'Capture button does trigger an action, as it turns blue as the mouse button is pressed, but returns to standard UI colour when I release mouse button and capturing is not enabled.

2. The issue persist no matter method of launch or how often I launch Fiddler.

One other observation - If I hit the capture button, and then shutdown Fiddler completely, it generates an unhandled js exception. If I simply launch and then shutdown Fiddler without clicking the 'Capture button, no exception. This is consistently reproducible. See attached screenshot.

Attached logs(open $TMPDIR) show a socket exception and internal 500. Please rename from .png to .zip.

Thanks

Rainier

13 posts

Member since:
Feb 2015

Posted 22 Feb 2019 in reply to Dimitar Link to this post

Hey,

1. I was only ever prompted for password the once, upon clicking 'Capture the very first time I enabled it after install. Never seen a password prompt again however.

2. Issue persist regardless of how many times I launch Fiddler since having installed it a week ago.

Note - The 'Capture button does appear to trigger when I click it, as it turns blue. But as soon as I let go of the mouse button it turns back to default UI colour and remains disabled. Logs(open $TMPDIR) appear to show a socket related issue plus an internal 500, amongst other things. Please rename from .png to .zip

This Mojave 10.14.3 and integrated firewall is disabled btw, with no AV/Malware engine installed.

Thanks

logs.png

Brandon Smith

1 posts

Member since:
Feb 2019

Posted 26 Feb 2019 Link to this post

I am having the exact same issue.

Diego

1 posts

Member since:
Feb 2019

Posted 27 Feb 2019 Link to this post

Same issue here, logs bellow:

NOTE: In my case, system proxy configurations are defined with a .pac file.

[2019-02-27 15:13:39:866] [info] Initializing splash screen.
[2019-02-27 15:13:39:910] [info] Attempting to run server - 5 attempts left.
[2019-02-27 15:13:39:910] [info] Generating random port.
[2019-02-27 15:13:39:910] [info] Trying to start server at port [33887].
[2019-02-27 15:13:40:450] [info] Displaying splash screen.
[2019-02-27 15:13:41:865] [info] Fetching .NET Core server status.
[2019-02-27 15:13:42:362] [info] Application successfully connected to .NET Core server [33887].
[2019-02-27 15:13:42:362] [info] Loading application in window.
[2019-02-27 15:13:42:365] [info] Maximizing application window.
[2019-02-27 15:13:42:481] [info] AutoUpdate is enabled.
[2019-02-27 15:13:42:517] [info] Checking for update
[2019-02-27 15:13:42:952] [info] Destroying splash screen.
[2019-02-27 15:13:43:793] [info] Update for version 0.2.2 is not available (latest version: 0.2.2, downgrade is disallowed).
[2019-02-27 15:13:42:011] [Information] [Fiddler] !WARNING: Failed to get proxy information for Connection 'OSX Default' due to System.ArgumentOutOfRangeException Specified argument was out of the range of valid values.
Parameter name: i
[2019-02-27 15:13:42:013] [Information] [Fiddler] !WARNING: The Default Gateway information could not be obtained.
[2019-02-27 15:13:42:018] [Information] [Fiddler] Error: Failed to register Fiddler as the system proxy.
[2019-02-27 15:14:29:635] [Information] [Fiddler] !WARNING: Failed to get proxy information for Connection 'OSX Default' due to System.ArgumentOutOfRangeException Specified argument was out of the range of valid values.
Parameter name: i
[2019-02-27 15:14:29:635] [Information] [Fiddler] !WARNING: The Default Gateway information could not be obtained.
[2019-02-27 15:14:29:635] [Information] [Fiddler] Error: Failed to register Fiddler as the system proxy.
[2019-02-27 15:14:29:659] [Error] [Angular] Failed to toggle capturing

Dimitar

Admin

41 posts

Posted 08 Mar 2019 Link to this post

Hi Diego,

For the moment, we are not supporting Proxy Auto Configuration file handling on Mac and Linux. The full proxy configuration capabilities for Mac and Linux will come at a later stage of the development of Fiddler Everywhere.

Regards,
Dimitar
Progress Telerik

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Simeon

Admin

241 posts

Posted 02 May 2019 Link to this post

Hi all,

Thank you for the feedback. It really helps us to improve Fiddler Everywhere.

Based on the stack traces from the logs, it seems that during application startup Fiddler Everywhere is unable to load its root CA certificate for HTTPS traffic from ~/.fiddler/Certificates/RootCertificate.p12 Unfortunately, this case is not handled appropriately in the current version and the rest of the startup logic is not executed. Hence, the proxy settings are not initialized and the Capture button does nothing.

Until, we fix this behavior in the next version, could you please, uncheck the 'Decrypt HTTPS traffic' setting, remove the ~/.fiddler/Certificates/RootCertificate.p12 certificate, then re-check the 'Decrypt HTTPS traffic' and trust the new certificate. This should make Fiddler Everywhere generate a new ~/.fiddler/Certificates/RootCertificate.p12 file which should be valid.

Thanks and Regards,
Simeon
Progress Telerik

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Rainier

13 posts

Member since:
Feb 2015

Posted 02 May 2019 in reply to Simeon Link to this post

Hi Simeon, that seems to work, thanks!

Simeon

Admin

241 posts

Posted 02 May 2019 Link to this post

Hi Rainier, could you please, confirm that you are able to close Fiddler Everywhere and open it again and it starts to capture when you enter your password. Thanks!

Regards,
Simeon
Progress Telerik

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Rainier

13 posts

Member since:
Feb 2015

Posted 02 May 2019 in reply to Simeon Link to this post

Indeed it does, which is surprising as I'm pretty sure I went through this a few times before but no dice. I don't recall seeing the authN prompts last time however. One other thing to mention - I actually updated it to the current version when the notification popped up, so maybe that's a factor.

If not then perhaps a transient issue with the OS and nowt to do with Fiddler, not sure, but it def works now having closed Fiddler and re-opened several times. I've actually opened a new thread on this :) https://www.telerik.com/forums/admin-password-required

Thanks

An

2 posts

Member since:
Jun 2019

Posted 22 Jun 2019 in reply to Simeon Link to this post

I'm still getting this error when closing the app after I delete the cert and reinstall the cert. This all happened when I started to use Charles and after I used Charles, I can't open FiddlerEverywhere anymore to get traffic. Before I was able to get traffic on my localhost without decrypt http and now I can't do that even when I reopen the app or reinstall the app. Can you take a look? Thanks.
Uncaught Exception:
Error: connect ECONNREFUSED 127.0.0.1:52776
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1161:14)

Simeon

Admin

241 posts

Posted 28 Jun 2019 Link to this post

Hi An,

Thanks for the feedback and sorry for the inconvenience. Could you please, provide us with the contents of your "$TMPDIR/Progress Telerik Fiddler/Logs" directory. I hope that it would allow us to investigate further the root cause of the problem.

Thanks and Regards,
Simeon
Progress Telerik

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An

2 posts

Member since:
Jun 2019

Posted 28 Jun 2019 in reply to Simeon Link to this post

Sorry issue is resolved now. A reboot of my Mac re-prompted for my password and resolved the problem. I didn't need to install the security certificates nor check decrypt https. It works now after removing the certificates and rebooting my Mac. Thanks.

Eleanor

9 posts

Member since:
Aug 2019

Posted 01 Aug 2019 Link to this post

I did the steps above to turn off https decryption, then to export a new certificate to trust. Still no response when I click "Capture" button. Never seen a prompt for a password either. So... Fiddler Everywhere on macOS Mojave just isn't working at all for me. v 0.4.0

Simeon

Admin

241 posts

Posted 02 Aug 2019 Link to this post

Hi Eleanor, the second step regarding the certificate file deletion is very important. Here are the workaround instructions for your convenience:

1. uncheck the 'Decrypt HTTPS traffic' setting
2. delete the ~/.fiddler/Certificates/RootCertificate.p12 certificate
3. re-check the 'Decrypt HTTPS traffic'
4. trust the new certificate.

Regards,
Simeon
Progress Telerik

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Eleanor

9 posts

Member since:
Aug 2019

Posted 02 Aug 2019 in reply to Simeon Link to this post

I've done all those steps several times. Cleaned out my keychain before 'trusting' the newly created certificate. Restarted the Mac. No auth prompt. No action on clicking 'Capture'

Simeon

Admin

241 posts

Posted 02 Aug 2019 Link to this post

Thanks for the confirmation. In this case, could you, please, provide me with the $TMPDIR/Progress Telerik Fiddler/Logs directory contents. It could help me find the root cause of the problem and to fix it.

Regards,
Simeon
Progress Telerik

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Eleanor

9 posts

Member since:
Aug 2019

Posted 02 Aug 2019 in reply to Simeon Link to this post

Don't seem to have that path:

$ cd $TMPDIR/Progress Telerik Fiddler/Logs
-bash: cd: /var/folders/g5/bnwx46md7tg_x0g8lyd0f_bjwnfqlm/T//Progress: No such file or directory

Could you give another way to find your logs?

Simeon

Admin

241 posts

Posted 02 Aug 2019 Link to this post

You should try with double quotes due the spaces in the path.
cd "$TMPDIR/Progress Telerik Fiddler/Logs"

Thanks,
Simeon
Progress Telerik

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Eleanor

9 posts

Member since:
Aug 2019

Posted 02 Aug 2019 in reply to Simeon Link to this post

Well... having a hard time getting to that path using Mac's file upload dialog!

Eleanor

9 posts

Member since:
Aug 2019

Posted 02 Aug 2019 in reply to Simeon Link to this post

Copied them elsewhere... here are most recent logs

Eleanor

9 posts

Member since:
Aug 2019

Posted 02 Aug 2019 in reply to Simeon Link to this post

You only allow jpg etc... not log files in your attach function. So I had to take screenshots.

Simeon

Admin

241 posts

Posted 02 Aug 2019 Link to this post

Thanks Eleanor, you are great and providing me with the logs was really helpful. I would like to apologize for the inconvenience which this caused to you.

From the logs which I am seeing, Fiddler is having trouble getting the proxy server settings for the 'OSX Default' network connection.

I have two questions:

Is this your primary Internet connection?

What are the proxy server settings on the 'OSX Default' connection?

You can check you settings from System Preferences / Network, select the 'OSX Default' connection, click the Advanced... button and go to the Proxies tab.

If you are using the Auto Proxy Discovery or the Automatic Proxy Configuration options, they are still not supported for Mac and Linux.

If you would like, you could vote for this feature in our feedback portal.

Regards,
Simeon
Progress Telerik

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Eleanor

9 posts

Member since:
Aug 2019

Posted 02 Aug 2019 in reply to Simeon Link to this post

Well, we are using Kensington Hubs and I'm attaching what's in the proxy tab on that connection (there is no OSX Default in my list). Don't know a heck of a lot about proxy settings. My company does not use proxies. I do notice the "bypass for these hosts and domains" listing... for what it's worth.

Screen Shot 2019-08-02 at 2.15.37 PM

Mario

3 posts

Member since:
Aug 2019

Posted 02 Aug 2019 Link to this post

I've been looking at the feedback and trying the different steps that are available and nothing is working. Here is my log file. Could I please get some assistance? Here are a few things that are (not) happening:
1. Not getting a request for a username/password
2. Capture isn't working at all
3. I use a VPN...although it's currently not on. Will that give me any trouble?

Mario

3 posts

Member since:
Aug 2019

Posted 02 Aug 2019 in reply to Mario Link to this post

Attached file.

Alon

2 posts

Member since:
Aug 2019

Posted 05 Aug 2019 Link to this post

Hi,

I'm having the same problem when trying to use the application to proxy my network traffic.

1. When clicking on the 'Capture' button nothing happens.

2. I tried to uncheck+delete+re-check process and I didn't get the 'trust new certificate' popup and this didn't help in solving the issue.

3. Attached the logs from the "$TMPDIR/Progress Telerik Fiddler/Logs" folder.

4. I don't have any 'fiddler' cert in my keyChain - See attached image.

Can you please assist me?

Thanks,

Alon.

Eric R | Senior Technical Support Engineer

Admin

310 posts

Posted 07 Aug 2019 Link to this post

Hi Alon,

From the logs it looks like Fiddler Everywhere is opening and closing fine but this may be an issue with .NET Core. Before we start investigating .NET Core, can you answer the following questions:

1. - When you open Fiddler Everywhere and check the Proxy settings for the default Network are the Web Proxy (HTTP) and Secure Web Proxy (HTTPS) checkboxes selected?

2. - Is .NET Core installed?

3. - What version of macOS is being used?

Please let me know if you need any additional information. Thank you and I look forward to your reply.

Regards,

Eric R | Technical Support Engineer
Progress Telerik

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Feedback Portal and vote to affect the priority of the items