[support] Ping and Drupal modules

[Karthik]

>    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?

You are very likely better off setting up a "multi-site" with
appropriately shared tables. Drupal ID (Drupal module) will require a
login of the form:
username at site-A.com when logging into site B and vice versa.

hth
-K