For every proxy server connection tried in the steps above, the sensor will attempt to connect with:
The proxy port that is configured
Alternate port 54443; if this has been configured at install.
The Carbon Black Cloud Sensor retries network discovery only if it fails talking to the cloud (back end infrastructure). Once it has established a way to connect it does not retry until the next failure.
The Sensor will try the last known good settings that worked previously; starting with the most recent ones. This includes proxy, no proxy, credentials, no credentials, proxy used at install time, direct connection, alternate 54443 port.