Hi, Eyal-- It's not entirely clear what you're asking.
you're suggesting that you have a proxy server running in the cloud somewhere, and you want Fiddler to chain to that proxy. Is that correct?
By default, Fiddler will adopt the system's existing proxy settings when it starts. So, if your "cloud proxy" is configured as the system proxy when Fiddler starts, everything will work automatically. If you need to manually configure the proxy settings in Fiddler, choose Tools > Fiddler Options > Gateway.
Now, you mentioned PUTTY, which leads me to guess that maybe you've configured your system such that applications use a SOCKS proxy connection to talk over SSH to the cloud server? If that's the case, the procedure is slightly different, because SOCKS proxies behave differently than normal proxies.
In Fiddler, choose Rules > Customize Rules. Scroll to OnBeforeRequest
. Inside the function, add the following lines:
oSession["X-OverrideGateway"] = "socks=127.0.0.1:9150";
oSession["ui-backcolor"] = "#EFEF9F";
... where the socks= string points to whatever host/ip and port that your SOCKS listener is running on.
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