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Can "poor" subdomains have negative impact on root domain PR?

Can "poor" subdomains have negative impact on root domain PR?

1:22 pm on Jul 13, 2011 (gmt 0)

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My company implemented a way of showing clients progress on their websites. We do this by implementing "development" subdomains (example - development20.oursite.com).

My question is, since Google is indexing these subdomains, does the fact that they are not necessarily credible have negative impact on our root domain?

We noticed a PR drop from 6 to 4 over the past year and this came to my mind but wasn't sure how subdomains affected the root domain.

Any thoughts are appreciated!
2:21 am on July 14, 2011 (gmt 0)


WebmasterWorld Administrator phranque is a WebmasterWorld Top Contributor of All Time 10+ Year Member Top Contributors Of The Month

joined:Aug 10, 2004
votes: 245

you shouldn't let google index content on development servers.
i would implement one of the following (in order of preference) methods of robots exclusion:
- use basic HTTP authentication for that subdomain, which will serve a 401 Authorization Required status code to search engine crawlers.
- include a noindex meta robots tag or X-Robots-Tag header in your HTTP response.
- disallow crawling the development content using robots.txt