Capture traffic on Windows with VPN connected

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Fiddler Classic Windows
SkyDancer
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SkyDancer asked on 29 Nov 2021, 04:09 PM | edited on 29 Nov 2021, 04:12 PM

Hi, I use some VPN (Windows 10 x64) that works trough TAP-Windows Adapter V9, is there any way to capture traffic from process that proxied by this VPN? I tried turn on VPN then run Fiddler and when I run my Firefox with VPN on it I have an error in my Firefox:

Secure Connection Failed 

The connection to the server was reset while the page was loading.

Also tried add VPN url to Fiddler options > Connections > Bypass Fiddler for URLs that starts with. Still same issue is up.

So can I fix this somehow?

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SkyDancer
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answered on 30 Nov 2021, 07:50 PM

I finally found the way. If u have  any VPN just run it and do not proxy any app just run it and keep connected, then go to browser you want to use for capture traffic then set proxy in the browser same as your VPN IP address, then go to Fiddler and set same VPN IP Address to this configuration: fiddler.network.egress.IP

And after this settings you will have VPN's IP in your browser and also Fiddler will capture traffic from your browser. The only one might be issue for you: you wont be able to stop capture traffic, Fiddler will capture traffic all the time even if you turn capturing off.

Good luck all :)

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Fiddler Classic Windows
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