Getting Fiddler to capture remote traffic

Question

On my webserver I have an web app installed and I want to monitor traffic to/from that app. Hence I installed Fiddler. When I browse to that app from the webserver/through localhost the traffic is captured however when I browse to the web app from a different server no traffic is captured.

I tried adding:

 <system.net>
     <defaultProxy enabled="true">
         <proxy proxyaddress="http://127.0.0.1:8888" bypassonlocal="False"/>
     </defaultProxy>
</system.net>

to web.config and to machine.config with no success.

Fiddler has to be installed at the client side. No wonder if you browse from a different server, nothing is captured. — Wiktor Zychla, Apr 08 '19 at 18:17
It should be possible to just install it on the server side and see client requests to that server and server responses. No? — Peter Chikov, Apr 08 '19 at 18:42
This is probably closest to what you could do, however, I am not sure if this solves your case https://docs.telerik.com/fiddler/Configure-Fiddler/Tasks/MonitorRemoteMachine — Wiktor Zychla, Apr 08 '19 at 20:24
@wiktor-zychla This seems to indeed be the best I can do. Please move your comment to the answer so I can accept it. — Peter Chikov, Apr 17 '19 at 18:34

score 1 · Accepted Answer · answered Apr 18 '19 at 06:31

The answer accepted by the OP involves installing Fiddler at the server, checking the Allow remote computers to connect in options and setting the proxy at the client that points to the server on the port Fiddler is exposed.

They have some screenshots of this setup here.

Getting Fiddler to capture remote traffic

1 Answers1