Firewall Traffic Rules Defaults: What Are They?

There are several traffic processes that NIS blocks by default.  I have cobbled together a .jpg file of what they look like within my Settings/Firewall/Traffic Rules tab, below.  I would like to be able to look up exactly what each one of these traffic processes are and what they entail, so I can understand which processes should continue to be blocked, and which I can let through if I choose.

Anyone who has an idea of this, please let me know.  I appreciate your help.  Thanks.

NIS Fitrewall Traffic Rules Default Blocks.jpg