H1B working status

[tsshetty]

I am a H1B holder in an US university. I know that H1B visa holder cannot work as self-employed or freelancer and do contract type of work in free time (https://www.immihelp.com/usa-h1-visa/).

Is it possible for me to work outside US (as consultant) on availing leave from the existing employer for 15-20 days?

Your suggestions are welcome.