What is the best for pcc
src address and port or both address and port
My view:
best randomization: both address and port.
But …
As far as I understood using both address and port might result in connections going to the same target but due to different ports could be using different streams. And some applications don’t like that so they may stop (banking with https e.g.).
Both address only (without port) should circumvent that from happening. But a bit less randomization.
It depends on what you want: best distribution of load, or least chance of subtle problems with certain sites or services.
I use “src address only”. That gives least chance of trouble, but it only distributes load well when you have lots of users.