The following parameters could be set for the special front page of your site:

• Indexing: Adds a <meta name="robots" content="NOINDEX, FOLLOW"> tag to the headline of the special front page. The NOINDEX parameter aims to prevent search engine robots to index the page that contains it, and the FOLLOW tells search engines that it may follow any of the links contained on the page.
• Make canonical:
  • 301 redirect to canonical URL when possible
  • Use rel="canonical" whenever necessary
  • Use rel="canonical" even when not necessary (self-refering)