Last week I was privileged to be sponsored by the Network Time Foundation to give a talk at AusNOG 2017. The slides are now available on the conference site (and here, too). The talk covers some of the operational issues which NTP has faced over...
Yesterday I updated NTPmon to include telegraf support; if you are interested in the code changes see github compare for details. It should be considered alpha-quality at this stage; it communicates with telegraf using the TCP or socket listener,...
I presented my talk based on the blog posts here at Linux.conf.au 2017; thanks to everyone who responded - your feedback is appreciated. Here are some links for anyone who's interested: Talk slides Youtube video Downloadable video There won't be...
(See the menu for other posts in this series.) Am I in sync? So now that we've configured NTP, how do we know it's working? As Limoncelli et. al. have said, "If you aren't monitoring it, you aren't managing it." There are several tools which...
(Part 1 one of this series gave the background and rationale, and part 2 covered the basics of how NTP works.) Getting NTP Depending on how you install Linux, you might already have a pretty workable NTP client, but for the tools we'll be working...
(Part 1 covered the background and rationale. Part 3 is about installation and configuration.) What is NTP? NTP (Network Time Protocol) is an Internet standard for time synchronisation covered by multiple RFCs. "NTP is [arguably] the longest...
(With apologies to Derek Zoolander and Justin Steven. And to whoever had to touch the HP-UX NTP setup at Queensland Police after I left. And to anyone who prefers the American spelling "synchronization".) (This is the first of a series on NTP. ...
Background Prompted by a request from staff at a client's head office, a couple of days ago i posed this question to a couple of the mailing lists i'm on: what is your size limit on individual email messages? I was blown away by the speed,...
One of my clients had some very interesting Internet traffic statistics last week. We came in Thursday morning and found that overnight we had downloaded over 700 GB of data from our ISP (UQ SchoolsNet). When we looked through our proxy server...
Project Honeypot just published a report of their experience in processing 1 billion spam messages. Highlights for the impatient: For the past 5 years, spam "bots have grown at a compound annual growth rate of more than 378%. In other words, the...