Using google authenticator with OpenBSD SSH logins
Introduction on two factor authentication Please read the following information on two factor authentication and why you would want to use it. http://en.wikipedia.org/wiki/Two-step_verification
NOTE: Make sure you leave a terminal with root access if you are using a remote system until you have tested that you can indeed authenticate to it!
Steps tested on OpenBSD 5.4, used tools on EL6 client to generate QR code. I’m mainly documenting this here so I can remember how to do this again.
Buffer bloat mitigation with OpenBSD pf
For an introduction to buffer bloat read more here http://en.wikipedia.org/wiki/Bufferbloat . My home network utilizes OpenBSD and the built in packet filter (pf). I use cable for broadband internet and found that if I tried to upload a large file my internet connecting became very unable with high amounts of latency. After utilizing tools such as http://netalyzr.icsi.berkeley.edu/blog/ it became obvious that I was suffering from buffer bloat. After doing some searching I came across using altq support in pf to try some configuration changes to reduce the buffer bloat in my configuration.