I'm (over)preparing for a presentation about IPsec i'll soon have to hold. Pretty new to reading RFCs but i'm hooked. Fascinating to know these are the rules the bits have to play by for the cat pictures to work.
The tea was chosen more or less randomly, but it tastes well and does a good job of representing the bittersweetness of being able to dive deep into the subject while also having to do that on a deadline. Keeps me warm, too.
For the people that like other things:
IPsec is a suite of networking protocols used for building VPN tunnels. Networking protocols are standardized in so called Requests For Comments (RFCs) by the Internet Engineering Task Force (i know, right?). RFC 7296 is about IKEv2, one of the protocols used in IPsec.
I can't answer the banking app question, but in regards to ease of installation, i'd recommend checking out the web installation guide beforehand so you can estimate how comfortable you'd be following it.