Hi all,'

   I've been meaning to write to ask if someone could better explain for me the use of the Drupal module.  I know basically what it does but how would one link with other specific sites?  Suppose I wanted to have 3 drupal installs of mine, in different locations all allow the users to login with one login for all 3 sites?  How do I setup the Drupal core module to do this?

Or to work with other drupal sites?

 

For ping, where is that set?  Is it set by default to ping a specific site for the newsfeeds?

Thanks,

Bruce