Dunning-Kruger and Learning

I can't imagine you've never heard of the Dunning-Kruger effect - it is a popular and well known model of actual expertise vs. perceived expertise, and your confidence in them. I think, as IT professionals, it is useful that we know it exists, particularly as we embrace new technology or extend our learning. 

So why is this a big deal...? 

Tune your home network for Work-from-Home / Quarantine / Isolation - "Un-Suck your Wi-Fi"!

I can't authoritatively comment on COVID-19, despite a lot of years in the biological sciences, even some microbiology and a long term, vague (perhaps somewhat morbid) interest in emerging pathogens.

I certainly CAN suggest how you can tune up your home network to ensure it's going to be the best it can be to cope with you, your partner, flatmates, relatives and children (or whatever your domestic arrangement might be!) stuck at home and depending on the Internet as a life-line.

More and more countries seem to be enacting (entirely justifiable) stringent isolation measures for many weeks at a time, so I trust this information will be of some small help during this difficult time.

Funemployment

My wife and I recently moved continents, and I have now joined the ranks of the funemployed, because (for our family) moving was more important that moving to a job. I'm certainly going to miss my old job (because, aside from being given billions of dollars and told to go explore the oceans, "Network Architect" is exactly where I want to be, and I worked with great people and did fun things!).

Read on for some thoughts on how to make the most of this process, and perhaps some ideas of what to do when you move vast distances...

Trust Boundaries and Reliable Backups: Ransomware Edition

A network whose administrators I know quite well has been thoroughly compromised and critical files encrypted, and much configuration destroyed. Even their backups (such as they were) are no more.

This is, to put it mildly, a fairly catastrophic incident for any organisation.

We turned our minds to the issue and thought about how we can prevent similar things happening to us...

Happy Eyeballs. Unhappy user.

As part of the migration efforts to IPv6, many programs implement a system known as "happy eyeballs". The basic premise is that sometimes, IPv6 "is flaky", and after a while, you should give up and take the IPv4 option - resulting in some "happy eyeballs". In a dual stack system, IPv6 is preferred.

Well the thing about this is it is S L O W... and users (not unreasonably) get grumpy about it. Here's a case where something went wrong, and *everything* was subjected to this delay.

Port Mirroring in Junos

So sometimes, the manual isn't quite detailed enough...

At the moment, our telephony people are having some issues with various things like handsets logging themselves out under certain conditions.

Vendor support has requested packet captures, and rather than schlepping around to the four corners of campus, dropping off laptops by each switch stack, I thought "wait, Junos does port mirroring, and it looks straightforward".

It is, and it isn't...

Glitchy RPKI OV and uRPF: one hell of a match

I've previously written about RPKI and mentioned some of the glitches. It looks like there are some other fun interactions to be had if you're implementing all the "best practice" internet edge routing for your customers...