FIddler Linux Catch Traffic of Proton Games?

[Diether]

Hello.

 

On Windows it works perfectly fine for me. However on Linux fiddler everywhere seems to be unable to catch traffic from windows games running through proton. Is there any way to get that working?

[Nick Iliev]

Hello Diether,

 

Valve's Proton utilizes Wine ("Wine is not an Emulator") behind the scenes. As pointed out here, the Proton API won't respect the global variables http_proxy and https_proxy, and there is no official documentation for an API that allows you to modify the proxy settings. The same goes for WINE, where there is no official API to change the proxy configuration.

You could try modifying the proxy settings through WINE's registries - refer to the instructions listed in the following article:

https://www.winehq.org/pipermail/wine-users/2007-March/025942.html

HOWTO:
$ wine regedit
Open the key Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings
Create a new DWORD called "ProxyEnable" and give it the value "1"
Create a new String called "ProxySever" and give it the value
"your.proxy.here:port"

 

 

Regards,
Nick Iliev
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[Diether]

Thank you.

Tried it but sadly did not work.

[Nick Iliev]

It looks like there is no straightforward approach to configuring Wine to go through a proxy. There are some complex solutions provided in this SO thread that include messing around with iptables, but I can't confirm or recommend that approach as it might cause other issues.