An SSL/TLS handshake requires at least 10 times more processing power on a server than on the client. SSL renegotiation attacks can readily take advantage of this asymmetric workload. Watch this video to learn how to easily mitigate these attacks.
If you already use NetBeans for Java or C/C++ development, then it should probably be your top choice as a Rails IDE as well. Delivering strong editing and navigation along with good debugging and profiling, it's a very capable and highly integrated Rails IDE. And it's free.