Problem when trying to monitor http(s) requests of Ubuntu on Windows 10

[MOHAMMADMEHDI]

I am a new Fiddler classic user on Windows 10.  I can easily monitor http(s) requests of my browsers such as Chrome or Microsoft Edge. However, no http(s) requests are seen from my Application "Ubuntu on Windows". I have checked it (exemted) in WinConfig toolbar. What could be the problem here. Thanks in advance!

[Nick Iliev]

Hi Mohammadmehdi,

 

 

You must configure the "Ubuntu on Windows" application to use the system proxy which is the Fiddler proxy when Fiddler catering is on. As this application is basically a WSL (Windows Subsystem for Linux) you can use the known Linux techniques for setting proxy.

For example, here is how to set a system-wide proxy through global environmental variables

export http_proxy=127.0.0.1:8888
export https_proxy=127.0.0.1:8888

 

 

Regards,
Nick Iliev
Progress Telerik

[risc]

Does not work, no connection:

$ export http_proxy=127.0.0.1:8866
$ export https_proxy=127.0.0.1:8866
$ curl www.google.com
curl: (7) Failed to connect to 127.0.0.1 port 8866: Connection refused

[Nick Iliev]

The default port for Fiddler Classic is 8888, while you have specified port 8866, which is the default port for Fiddler Everywhere. To ensure you are using the correct port, please check your Fiddler settings and use the specified port explicitly.

[risc]

correct port, i checked it. working outside of wsl.

[Nick Iliev]

If your Fiddler proxy is configured on 127.0.0.1:8866 and Fiddler is up and running (with capturing turned on) and curl returns Connection refused, either the WindCongig app is not exempt from the WinCongig option in Windows or another tool prevents the connection to the proxy server. The latter is more likely as it seems that you don't have a connection not only from WSL but also from curl, which indicates that the proxy is not working (or si limited by a third-party tool like firewall) at all.

[risc]

when i curl from cmd.exe  i get an answer, when i curl from wsl terminal ssh i get no answer ...