How can I stop search engine to go to my subdomain?

[virtualreality]

How can I stop search engines to go to a sub domain of my site?

[mack]

The sub domain will be viewed by a bot as a different site. It will therefore read the robots.txt file located at subdmain.example.com/robots.txt

If you disallow robots there, the sub domain wont be crawled.

Mack.

[virtualreality]

Thank you, Mack.

[Joshb]

You could also twick the robots.txt file to control which sub-domain will be scanned. could be a powerful tool to 'trick' crawlers "last-scan" timers.