# Mitmproxy for windows does not work

**URL:** <https://discourse.mitmproxy.org/t/mitmproxy-for-windows-does-not-work/272>\
**Category:** help\
**Created:** [December 27, 2016, 11:50am UTC](https://discourse.mitmproxy.org/t/mitmproxy-for-windows-does-not-work/272 "2016-12-27T11:50:10Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Slini11](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/slini11/32/91_2.png) [@Slini11](https://discourse.mitmproxy.org/u/Slini11)\
**Post date:** [December 27, 2016, 11:50am UTC](https://discourse.mitmproxy.org/t/mitmproxy-for-windows-does-not-work/272/1 "2016-12-27T11:50:11Z")

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Hi,

i heard about mitmproxy this morning and was very happy about the new v1.0 with Windows-support :-).  
I used the installer and everything worked fine. So I started the mitmproxy ui and it said “Proxy server listening at [http://0.0.0.0:8080/](http://0.0.0.0:8080/)” and “Web server listening at [http://127.0.0.1:8081/](http://127.0.0.1:8081/)”. The the webinterface at my browser opened but it does not show any traffic 😕 (thats my main problem). I opened [mitm.it](http://mitm.it) and it says: “If you can see this, traffic is not passing through mitmproxy.”. Any ideas why this does happen? Did I miss something during the installation? Do I have to mind something?

mitmproxy 1.0.0 (windows installer)  
Windows 10.1.14393  
Python 3.6  
Firefox 50.1.0

Thanks for your help,  
Nils

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**Author:** ![BSalita](https://avatars.discourse-cdn.com/v4/letter/b/f19dbf/32.png) [@BSalita](https://discourse.mitmproxy.org/u/BSalita)\
**Post date:** [December 27, 2016, 11:53am UTC](https://discourse.mitmproxy.org/t/mitmproxy-for-windows-does-not-work/272/2 "2016-12-27T11:53:59Z")

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Here’s an unofficial quick answer. Firefox certs are more problematic than Chrome. Use Chrome, navigate to [mitm.it](http://mitm.it) and install the cert as root certificate. You can also install the cert via Chrome’s Advanced Settings.

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**Author:** ![mhils](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/mhils/32/7_2.png) [@mhils](https://discourse.mitmproxy.org/u/mhils)\
**Post date:** [December 27, 2016, 12:10pm UTC](https://discourse.mitmproxy.org/t/mitmproxy-for-windows-does-not-work/272/3 "2016-12-27T12:10:07Z")

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Did you configure your client/browser to use mitmproxy?  
We currently differ from Fiddler in that regard as we do not start capturing traffic on the local machine automatically.

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**Author:** ![Slini11](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/slini11/32/91_2.png) [@Slini11](https://discourse.mitmproxy.org/u/Slini11)\
**Post date:** [December 27, 2016, 1:09pm UTC](https://discourse.mitmproxy.org/t/mitmproxy-for-windows-does-not-work/272/4 "2016-12-27T13:09:43Z")

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The problem was the browser configuration. Thanks for your fast response 🙂.