damn you vlan 1

scenario you have a switch facing a firewall port and you’re seeing some spurious DHCPv6 hits against the native VLAN despite having no switchport native vlan being set on the trunk interface facing the firewall. a quick look at the link local addresses points at the switches themselves in the network. then you remember that you have cisco switches and that you need to check the most holy VLAN 1. mercifully, the following fixes this broke ass behavior....

July 6, 2021 · steve ulrich

fyrtur-tradfri homekit setup notes

we ended up putting the fyrtur blinds in our condo this month. these are an excellent value. a few nit-picky items that might be helpful for other folks that are considering these blinds. these notes are applicable only to my experience using homekit and ikea’s tradfri gateway. i assume that this stuff is a dumpster fire from a security perspective and i stick all home automation elements on a separate network segment far away from data i really care about....

June 27, 2021 · steve ulrich

yo! fat tails

I wrote about some key takeaways from @nntaleb's new technical book, Statistical Consequences of Thick Tailshttps://t.co/Qj5ab0WtpJ It's a short review on fat tails in plain english, including the relationship between moments, tail indices, and pseudo-convergence pic.twitter.com/X5Zbmc088J — F Y Isaac (@gelmanisaac) December 23, 2020 source link a surprisingly readable rundown on fat tails that will force you to brush up on some old stats stuff. oh, and there’s wolfram/mathematica code to explore as well....

January 3, 2021 · sulrich

removing snaps from ubuntu 20.04 LTS

# list the snaps installed by default % snap list # remove these 1 by 1 % sudo snap remove <snap-name-from-above> # remove any snap directories % sudo rm -rf /snap /var/snap # purge snapd from the system % sudo apt purge snapd

April 25, 2020 · sulrich

the trivialization of TED into a religion

this article hit pretty close to home this weekend when the TED radio hour came on and i had to ask alexa to shut it down because i couldn’t take the breathless delivery of the presenter spouting TED cliches. the tl;dr - TED’s about to become as vacuous as any other religion; titillating the senses and delivering pablum. the author doesn’t call it out in this manner. but they do a nice job of pointing out that TED’s veered into the trivializatin of things and the presentation of real problems as “puzzles to be solved....

March 8, 2018 · sulrich

adblocking tug of war

interesting paper re: the mechanisms being used to discover whether or not someone’s using an adblocker. (link)

January 12, 2017 · steve ulrich

gossip protocol

application layer multicast from stuff the internet say on scalability … ...

February 7, 2016 · steve ulrich

guess when google showed up at MICE

MICE aggregate traffic graph

June 25, 2015 · steve ulrich