UPDATE: Apparently, the Amazon servers are trying to gain access to my computer. Had over a thousand entries since the problem started, and they are all from Amazon IPs that try to bypass my firewall. (Note: My Gw2-64.exe has full access to the internet, inbound and outbound.) I have no idea what is going on there, but each time my firewall blocks such an "attack", the game loses connection.
Got disconnected from the game three times already during the course of the day. What's going on? I am on the EU server.
P.S. It is not my internet connection, because I did not lose that one (e.g., TS did not disconnect).