Have recently jumped from v2.3 to v5 and am having issues with a 502 error, "Gateway Connection Failed". This failure seems to be occurring randomly. For example, I can start capturing web traffic just fine, and in this case, I'm using Fiddler to ensure eLearning courses are sending a heartbeat/keep-alive to our Learning Management System.
The keep-alive occurs every minute. I'm experiencing the 502 error following one or more successful keep-alive POST events.
The response header specifically states:
502 Fiddler - Gateway Connection Failed
Cache-Control: no-cache, must-revalidate
[Fiddler] The connection to the upstream proxy/gateway failed. Closing Fiddler, changing your system proxy settings, and restarting Fiddler may help.
System.Exception Upstream Gateway refused requested CONNECT. 407
Can I utilize a FiddlerScript or AutoResponder to keep Fiddler authenticated to the proxy/gateway?