# Modified GET receives no response

**URL:** <https://discourse.mitmproxy.org/t/modified-get-receives-no-response/973>\
**Category:** help\
**Created:** [April 8, 2018, 8:31pm UTC](https://discourse.mitmproxy.org/t/modified-get-receives-no-response/973 "2018-04-08T20:31:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Muscle\_Hamster](https://avatars.discourse-cdn.com/v4/letter/m/dfb087/32.png) [@Muscle\_Hamster](https://discourse.mitmproxy.org/u/Muscle_Hamster)\
**Post date:** [April 8, 2018, 8:31pm UTC](https://discourse.mitmproxy.org/t/modified-get-receives-no-response/973/1 "2018-04-08T20:31:14Z")

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Hello,

Just for context, I am running two VMs. One serves as a router for the other. I have MITMproxy installed on the router. I can access the internet and what not successfully from my client VM. The script successfully modifies the GET request and changes the header and host to a different address. In this case, it changes “[www.google.com](http://www.google.com)” to “[www.stackoverflow.com](http://www.stackoverflow.com)”.

However, I do not receive a response when my script modifies the request. Any ideas why? I tried playing with iptables rules, but I feel this isn’t the issue since I can receive responses through the proxy as long as I don’t modify it.

Update, I have tried running mitmproxy on my local machine as well and routing my own traffic through it, when I modify a GET request via the mitmproxy ui for Windows, I still do not receive a response, my web browser just sits and loads.

**FIXED: Had to add the --set upstream\_cert=false when running**.

Thanks