One important note: If ur node is visible on the Internet then launch client by
java -cp Nxt.zip Nxt IP_ADDRESS
Right now only 1 bootstrapping node runs the newest version. If it goes down the network will be fragmented.
If I don't have a static IP, would it work if I set up dynamic DNS and use hostname instead of IP_ADDRESS? What ports should be opened if behind a router/firewall, is 7874 enough?
Privacy questions: Can an attacker monitoring your traffic (i.e. your ISP) learn your account number, if you just log in (at localhost:7875), without sending transactions? Is your IP being recorded in the blockchain when performing transactions, thus exposing your account number? If so, could one connect using tor / socks proxy, like for example the bitcoin-qt client allows?