There is some troubleshooting that can be done using the curl tool. Curl is a command line tool which, much like our connectors, will need to have the appropriate proxy server settings specified in its parameters.
Download and install curl for your OS here. Linux users will probably already have curl installed.
Open a command line and run the following command:
curl --proxy <your.proxy.server> -I https://rally1.rallydev.com
A successful connection should appear as follows:
date: Wed, 28 Nov 2018 17:27:53 GMT
content-type: text/html; charset=UTF-8
set-cookie: __cfduid=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx; expires=Thu, 28-Nov-19 17:27:53 GMT; path=/; domain=.rallydev.com; HttpOnly
expires: Thu, 01 Jan 1970 00:00:00 GMT
x-xss-protection: 1; mode=block
p3p: CP="NON DSP COR CURa PSAa PSDa OUR NOR BUS PUR COM NAV STA"
strict-transport-security: max-age=31536000; includeSubDomains; preload;
set-cookie: SERVERID=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx; path=/
expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
Once you have curl working with the correct proxy settings, you may then apply those settings to the connector. Please bear in mind it may be necessary to work with your networking team to establish the correct settings for your proxy server including address, port number and credentials.