It has been far too long since my previous post introducing TLNTC. This episode will be a (hopefully!) shorter overview of TLNTC's journey into IPv6 connectivity. Early days I don't know when I started first started to think seriously about...
A few months ago now I got a couple of friendly alerts from OpsGenie telling me that my web server VM was down. I logged in and poked around, but things seemed to be pretty normal. The OpsGenie alert self-resolved shortly afterwards, and I...
(Credit: Flickr) Gather 'round, folks - Grandpa has a story to tell. (OK, I'm not a grandpa and I don't expect to be one any time soon, but as I've journeyed back in my memory to write this post, I sure feel old...) For as long as it has been...
[I originally started this post several years ago, but never got around to finishing it at the time. I think this instalment is more than overdue, and I hope to finish a few more over the coming weeks.] A big change in my running came around...
This morning before work I sat for (and passed) my attempt at the newly-minted VyOS Certified Network Engineer certification. Mostly this post is just to let folks know that the certification is out there and encourage them to take it, but also I...
A friend asked me today: what are the pros and cons of chronyd and ntpd? I've used both for a while, but never actually sat down to think about this question. So here are some initial thoughts: ntpd (the older of the two implementations): has had...
NTP: a behind-the-scenes protocol As I've mentioned before, Network Time Protocol is one of those oft-ignored-but-nonetheless-essential subsystems which is largely unknown, except to a select few. Those who know it well generally fall into the...
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...
I recently wanted to look at some packet captures on my NTP pool servers and find out if any NTP clients hitting my servers use extension fields or legacy MACs. Because the overall number of NTP packets is quite large, I didn't want to spool all...
This week I gave a talk at SecTalks BNE0x18 about how I solved last month's boot-to-root CTF. I've put the slides up now (you'll need to enable JavaScript for the remarkjs slides to work).