restrict access to customer portal and validate customer using external source

[amy]

This question is in reference to Atlassian Documentation: Serving customers with a knowledge base

Is it possible to set access control to Service Desk and validate the customers against an external source (e.g. database where we maintain our master list of customers)? 

[Kian Stack Mumo Systems]

You can restrict access to certain groups of people. This link has more information. Basically you can allow everyone to raise requests, you can allow only people with JIRA accounts to add, or you can authenticate against a list (which is managed by JIRA). I don't know that you can do it against a DB.