Err_Connection_Reset when Enable Capture

[Nam]

I use Fiddler Classic.

I enable Decrypt HTTPS and Trust Certificate.

Most websites can capture traffic, but some website display error: Err_Connection_Reset. How to fix it?

Thanks for reading!

[Nick Iliev]

Hi Nam Le,

 

Try resetting the FIddler certificates through Tools > Options >  HTTPS > Actions > Reset All Certificates. After that, if your application is no using the OS certificate store (like Firefox) reinstall the Fiddler certificate in the application as well.

 

Regards,
Nick Iliev
Progress Telerik

[Nam]

I do all it, but still error and i use Chrome

[Nam]

Try this site: https://giaitri.shopee.vn/shopee-delivery/?cid=1731357eb13431cb

[Nick Iliev]

The provided URL is working on my side - it is redirecting to https://giaitri.shopee.vn/shopee-delivery/web.html which is to be expected (as I probably need authentication to use the specific CID path)

[Nam]

Sorry for reply so late, if u open that site first time, that site working but no traffic display in fiddler, then if u reload site(https://giaitri.shopee.vn/shopee-delivery/web.html-use F5), appear error: Err_Connection_Reset

[Nick Iliev]

Still unable to reproduce the issue, which suggests that there might be a local configuration issue related to the security certificates. Try disabling any antivirus and security tools that are running alongside Fiddler and re-issue your request. Alternatively, try the above with the new Fiddler Everywhere and let us know if you are experiencing the same issue.

[Jonas]

I'm also having trouble with net::ERR_CONNECTION_RESET. II have it running and trying to capture traffic going from a react widget running locally trough the the browser to my app on the computer,  getting " net::ERR_CONNECTION_RESET" when fiddler is active. Tried the classic version first and then tried fiddler everywhere. Reetting erver certs does not solve the proble.

[Nick Iliev]

Hey Jonas,

 

The ERR_CONNECTION_RESET can mean many things, including that your client app cannot reach the proxy. Ensure that your React widget/app is configured to respect the system proxy or to use the Fiddler proxy IP: port explicitly.