Blocking subdomains with Robots.txt file

[paulwatley]

We noticed that Google is indexing our pre-production site ibweb.prod.interstatebatteries.com in addition to indexing our main site interstatebatteries.com. Can you all help shed some light on the proper way to no-index our pre-prod site without impacting our live site?

[PaulM01]

Placing a robots.txt in the root of the subdomain will do it:

User-agent: *
Disallow: /

[Guest]

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