Hi Ravindra,
Those properties have to be set at the JVM level, it’s not directly related to the sonar scanner.
They are managed and understood by the network layer of the JVM:
https://docs.oracle.com/javase/8/docs/api/java/net/doc-files/net-properties.html#Proxies
So depending on your context (container, OS, …), you could set them for instance in an env variable, pass them as inline configuration, …
For instance you could use SONAR_SCANNER_OPTS : Error in Run Code Analysis with coporate proxy
Best.