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ignatz : networking   26

An update on Sunday’s service disruption | Google Cloud Blog
postmortem on google outage. note that once again it's a config error, which is how it happen now
gcp  google  odd  outages  post-mortems  networking  config  sysadmin  ops  via:jm 
5 weeks ago by ignatz
Wardoghk comments on Found hooked up to my router
Someone's roommate hooked up a phishing/snooping device to the house router after being conned by a pyramid scheme
security  infosec  wtf  reddit  networking 
september 2018 by ignatz
Heroku finds out that distributed queueing is hard
Stage 3 of the Rap Genius/Heroku blog drama. Summary (as far as I can tell): Heroku gave up on a fully-synchronised load-balancing setup ("intelligent routing"), since it didn't scale, in favour of randomised queue selection; they didn't sufficiently inform their customers, and metrics and docs were not updated to make this change public; the pessimal case became pretty damn pessimal; a customer eventually noticed and complained publicly, creating a public shit-storm.

Comments: 1. this is why you monitor real HTTP request latency (scroll down for crazy graphs!). 2. include 90/99 percentiles to catch the "tail" of poorly-performing requests. 3. Load balancers are hard.

http://aphyr.com/posts/277-timelike-a-network-simulator has more info on the intricacies of distributed load balancing -- worth a read.
heroku  rap-genius  via:hn  networking  distcomp  distributed  load-balancing  ip  queueing  percentiles  monitoring  via:jm 
february 2013 by ignatz
WinMTR - 0.8
Windows clone of the excellent MTR network diagnostic utility
networking  tools  utilities  sysadmin  windows  freeware 
july 2009 by ignatz
XBee® & XBee-PRO® 802.15.4 OEM RF Modules - Digi International
The low-power XBee 802.15.4 and extended-range XBee-PRO 802.15.4 use the IEEE 802.15.4 networking protocol for fast point-to-multipoint or peer-to-peer networking.
networking  hardware  wireless  wifi  embedded  xbee 
february 2009 by ignatz
Why San Francisco's network admin went rogue
bofh admin loses his shit; not so much a crime as an extreme case of sysadmin disease
bofh  failure  sysadmin  security  crime  networking 
august 2008 by ignatz

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