I am using Drupal 7 for a site and I installed the *Domain access* module for maintaining the sub-domains. The slideshow block (created using the Views module) should be displayed on the sub-domains front page, but not on the main domain.

I tried the *Domain block* module, but it would require to manually set the block for each domain. 

How can I make the block appear only on the front page of the sub-domains?