We currently have a Cisco ASA running software version 9.1. We need to implement egress filtering. I know some of the applications/ports that need to be allowed out of our network. However, I don't want to implement egress filtering and block outbound traffic that I'm not aware of that is required for business.
Is there an easy way to find out what some of our traffic patterns are on the firewall so I can get an idea of what outbound ports might currently be used?