Integration Architecture

Remember you have 10's of thousands of interfaces exchanges data in your IT eco system, suddenly there is a compliance requirement pushes you to draw this as diagrams for regulatory reasons to find what out what sensitive data is being shared, how to start a secure activity. Looks familiar? Reply me there is a software which can draw this as diagrams and part of a portal using an open source based enterprise architecture tool. It can be done real quick. This can also be used in impact analysis.