Configuring SNMPv3 can be a daunting task compared to earlier questions, just from the copious amount of authentication parameters compared to earlier SNMP versions. In this short primer I’ll walk you through the steps necessary to set it up to… Read More ›
network
How to Really Set Up NTP on HP ProCurve / Aruba Switches – HP Networking Series Part 7
This is a short guide on how to set up NTP time synchronisation properly on HP ProCurve / Aruba network devices. Astute readers of this blog might remember that I covered this topic back in 2015, and you’d be right,… Read More ›
Fixing SSL Labs Grade on F5 Big-IP – Weak Cipher Suites
Today we’ll take a look at fixing the error that kept us from getting a grade better than B last time. Last time we were left with this test result: “This server supports weak Diffie-Hellman (DH) key exchange parameters. Grade… Read More ›
How to Configure SNMPv3 on HP/Aruba Switches – HP Networking Series Part 6
Configuring SNMPv3 can be a daunting task compared to earlier questions, just from the copious amount of authentication parameters compared to earlier SNMP versions. In this short primer I’ll walk you through the steps necessary to set it up to… Read More ›
How to Configure CAA Records for Your Domain
In a quite recent event, the CA/Browser Forum decided that there’s a need for a way for CAs (Certificate Authorities) to check if they are allowed to issue certificates for a certain domain. And in a even more recent move,… Read More ›
How to Factory Reset a HP Procurve / Aruba Switch – HP Networking Series Part 5
Sometimes it might be helpful to reset an HP Procurve / Aruba switch to it’s default factory config, and weirdly it took me until my 153rd installed switch (yes, I actually looked up how many I’ve installed over the years… Read More ›
Setting Up a Virtual NTP Server on Debian
Virtualizing NTP servers has been quite a hot topic for some time, but regardless of what some people say, you can actually virtualize NTP servers, as long as you know what you’re doing. If you examine some public NTP servers… Read More ›
The World’s Longest Console Cable – Smartflex Router Series
As everybody knows, console cables and their corresponding interfaces are a scourge on a network administrators existence. They are always too short, COM-ports get renumbered, Baud-rates are unknown, etc. By their very nature, you also have to be physically present… Read More ›
Time Servers – GPS Antenna Placement
If you haven’t noticed already, I have something of a thing for everything time synchronization related. “Proper”, exact time is something that I find important, it’s probably OCD related. As a part of my day job, I manage a… Read More ›