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Month: April 2021

Posted April 27, 2021February 10, 2024Leave a commentPosted in ServerServer

Benchmark SSH Ciphers

Choosing a specific cipher to use for SSH can have a large performance impact when transferring files using tools that use SSH as a transport. For testing, I decided to benchmark the impact of using scp with various ciphers locally on my laptop as well as a VPS from Linode. […]

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Posted April 24, 2021April 25, 2021Leave a commentPosted in DesktopDesktop

The name org.freedesktop.secrets was not provided by any .service files

After ugrading Kubuntu 20.10 (Groovy) to 21.04 (Hirsute), I started getting the following error when trying to build any Docker containers: Various Googling pointed to the result; simply installing the gnome-keyring package resolved the problem: After doing that everything worked as expected. EDIT: After using the OS some more, I […]

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Posted April 19, 2021March 6, 2022Leave a commentPosted in PHP, ServerPHP, Server

WordPress wp-cron.php with Systemd Timer

The wp-cron.php script for WordPress handles various scheduled events (such as checking for updates, publishing scheduled posts and more). By default this will be executed at each page load (to check if anything needs to be done). A common recommendation is to disable this and instead run it as a […]

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Posted April 19, 2021April 19, 20211 CommentPosted in ServerServer

Linode Longview with MariaDB 10.5+

At the time of writing, the Linode Longview agent is not working with MariaDB 10.5 onwards. This happens because there is a hard coded binary name in the Perl script responsible for determining if MySQL monitoring is required; from MariaDB 10.5 the binary name has changed from mysqld to mariadbd. […]

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Posted April 14, 2021April 15, 2021Leave a commentPosted in Security, WindowsSecurity, Windows

Active Directory Password Cracking

These are the steps I use to get a dump of all password hashes from a domain controller and then crack the hashes with hashcat or john. Excluding the dumping of password hashes, these steps are all executed on a Linux host. If you are trying to do this completely […]

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Posted April 10, 2021April 15, 2021Leave a commentPosted in Networking, Puppet/RubyNetworking, Puppet/Ruby

Puppet – Aggregate, resolve, validate and filter IP addresses

When working with lists of IP’s with Puppet there are some common tasks that you will most likely encounter: Aggregate IP’s – As an example, if you have a firewall rule and the source list is like this: That list can be condensed into a single rule for only 192.0.2.0/24. […]

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Posted April 3, 2021April 10, 2021Leave a commentPosted in LinuxLinux

Linux Interface Names

For convenience I like to name the interfaces for my desktop/laptop in an easy to remember convention so that I don’t need to think about what the interface names are at all when running things like tcpdump. The best way I have found to do this is with udev rules. […]

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Posted April 3, 2021April 10, 2021Leave a commentPosted in Desktop, LinuxDesktop, Linux

KDE Plasma Thermal Monitor “Off”

The KDE Plasma Thermal Monitor widget has an annoying issue where the temperature sources will sometimes show as “Off” after rebooting. This seems to have broken around Ubuntu Groovy for me. This is a well known issue as referenced on the KDE forum among other places. To fix, I edited […]

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Posted April 3, 2021April 15, 2021Leave a commentPosted in Python, ScriptingPython, Scripting

Scapy – DNS queries with EDNS

To debug some issues with DNS (specifically EDNS related issues) I thought I would use Scapy so that I could craft the packets the exact way I wanted. As the issue was only occurring for some queries but not others due to the queries being sent to different front end […]

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