I learned many things while at IETF in Korea, and I might post more of them if I have time. But the most important one is that I've been brewing my green tea at way too high a temperature.
In most restaurants in North America, when you order tea, they give you hot water and let you choose a tea bag. In Korea, you point at the tea bag and then they select the appropriate hot water.
ssh+2FA to all your machines, anywhere, without opening firewall ports.