Employer terminated me during probation without reason, is this legal?

I was working with a tech company in Pune for the last 5 months on probation. Suddenly, they terminated my employment without providing any valid reason. I feel this is unfair as I was performing well and had no warnings. They say it's within their rights during probation. I'm now struggling financially and need to know if there's any recourse or compensation I'm entitled to under Indian labor laws.