Does Aeria use a service, or system that can blacklist an IP based to certain pattern behavior?
Aeria does not block IPs.
Everybody that cannot connect, can you please go to http://www.gameserverstatus.com/
, register an account, activate Premium (Currently Free in Premium Beta), and download the Desktop App. (You will need to enter your GameServerStatus login information on the first page).
When you've done that, please take a screenshot of the application and post it here.
Ideally, it will look like this:
This will greatly assist in identifying the issue that is preventing you from being able to play.