MacOS Catalina Kernel Panic on Power Wakeup
When waking up from sleep, my Mac on Catalina crashed with a kernel panic. Finally, I was able to figure out what the reason was.
Category: System
Isolate VM from LAN, allowing WAN
PowerShell script that adds a rule to the Firewall of a Windows VM blocking all traffic to the local network, except the gateway which makes it possible to still access the Internet.
The ever-hanging AppleScript Editor
The (My) AppleScript Editor tool, version El Capitan, has the bad habit to hang itself from time to time. Regular saving and killing the blocked process, followed by a simple restart of the tool was generally a good way to mitigate the problem. Once, however it was not possible to cleanly restart the AppleScript Editor even after a reboot…
Convert a Parallels Virtual Machine to VirtualBox
As user of the recent version of Parallels Desktop 12, you might be looking for the famous “Parallels Image Tool”. This application is not available anymore, but installed command line tools can be used to convert the Parallels PVM virtual machine to a disk file that VirtualBox can use to boot the machine.
Bridging VPN to Local Network with a Linux VirtualBox Proxy
A Linux (VirtualBox) VM connects to a VPN and this connection should be usable by the host machine (that runs the VM) or other machines on the local network for that matter. For security reasons, the Linux VM should not be a full member on the local network, which means that it cannot reach anything and cannot be reached on the LAN. This article discusses how to set-up a VM for that case.
Installing MongoDB on RHEL defining a Custom Data Directory
Installing MongoDB on Red Hat Enterprise Linux is straight forward. Changing the data directory is however a bit more delicate…
Building an Ethereum Environment with Docker
Docker is a powerful tool for managing containers and run-time environments and, besides its many advantages, Docker can also be handy to keep our development workstation tidy while playing with all kind of cool technologies – like Ethereum. In this article, we are going to harness the power of Docker to build a first Ethereum work and development environment.
Formula One again – LXDE and Kali 2
Kali 2 is a great improvement to the first version. However, the Kali 2 VM sometimes feels slow, the graphic outputs lags as does the terminal window. Let’s address this issue with the LXDE desktop manager.
Installing Java 7/8 JDK on Windows without executing the Installer
Short note on how to install Java 7/8 JDK without executing the installer on Windows.
VBoxClient: the VirtualBox kernel service is not running (Debian 8)
“VBoxClient: the VirtualBox kernel service is not running. Exiting.” – Dislike!
OSX – Rescue a Defect Disk
Reading the disk block per block into a DMG file that can be mounted afterwards.
Prevent Postfix SMTP from contacting Google Mail using IPv6
When delivering a SMTP message to Google Mail using IPv6, stricter anti-spam rules are applied. You need for instance to…
Compiling cURL with HTTP/2 support on Kali Linux 2
The cURL tool supports HTTP/2 in it’s current version 7.47, of 27th of January 2016. This version is however not yet distributed in Debian or Kali packages so one must take this matter into its own hands…
phpMySQLAdmin – Debian Quick Q&D Install
This describes a quick and dirty phpMySQLAdmin installation on Debian. Just to be clear – this is NOT the way…
rkhunter, Mac OS X and the Dica-Kit Rootkit
rkhunter is a script that everybody should run from time to time, especially on machines not having a controlled and well-scheduled workflow like development tools. On OS X, rkhunter produces however a false positive on the Dica-Kit Rootkit. Let’s discuss this case more in detail.
Create and Convert Key Files with Putty
The Putty tool suite comes with a quite handy tool named “puttygen”. The tool can be used to create a…
VirtualBox – REGDB_E_CLASSNOTREG Error when Starting under Windows
Once upon a time, I found myself faced to the following error when I tried to start Virtual Box 5…
Notes on the UFW Firewall
UFW, Uncomplicated Firewall, is the default firewall in Ubuntu. It is designed to lesser the complexity of the iptables firewall…
IntelMQ
IntelMQ is a solution for CERTs for collecting and processing security feeds, pastebins, tweets using a message queue protocol. It’s a community driven initiative called IHAP (Incident Handling Automation Project) which was conceptually designed by European CERTs during several InfoSec events. Its main goal is to give to incident responders an easy way to collect and process threat intelligence thus improving the incident handling processes of CERTs.
Postfix TLS Configuration
Let’s discuss some things around setting up (START)TLS support for a Postfix mail server. Once done, let’s trouble shoot the installation since configuring this things never go right at the first try :)
“Standard” e-Mail Adresses of Mail Servers
Any system that includes an SMTP server supporting mail relaying or delivery MUST support the reserved mailbox “postmaster” as a case- insensitive local name. But there are more “mandatory” standard mailboxes which are defined in RFC2142, among many others… nobody, webmaster, www, ftp, abuse, noc, and more…
pscp – File Transfer with PuTTY
The PuTTY tool suite allows to perform file transfers via SSH, avoiding the need to have a separate SFTP client. It’s not the most practical way, but comes very handy in some situations.
Crypto Miner Set-Up – Tanguy’s cpuminer-multi
Mining Altcoins is sometimes quite venturesome. The various download links on the Internet are often pointing to obscure file servers. In this article, we are going to compile Tanguy Pruvot’s version of the “cpuminer-multi” project, one of the most advanced CPU miner tools around, and the, than see how to use it. I also examined the behaviour from a system’s point of view .
VirtualBox – Mount a ‘Shared Folder’ under Linux
Sharing directories between a VirtualBox host and guest is actually more challenging than it looks like. This article discusses how this works…
Reset Partition Layout of an USB Stick
After installing a bootable Linux system on an USB stick, the stick contains multiple partitions, which make it a pain to reformat it into something “normal” again. Windows provides a solution thought…
Ethereum Client Quick Setup
Want to quickly set-up an Ethereum client in Linux? Here are the 6 commands to rule them all…
Linux XFCE Desktop – Screensaver deactivation
Unlike GNOME or Cinemon, there seems not to be a all-in-one point-and-click solution for XFCE. Multiple hacks are described around the net, but this worked in my case – a BeagleBoard displaying showcases.
Handy bash command collection – Part 28534
Converting a string into a series of hex with printf, Build-in ASCII/DEC/OCT/HEX table: man ascii, Calculate SHA hash values of text, Prevent commands from being logged in history, Obtaining list of MTAs registered to domain, Retrieving the GIT client proxy settings, List of commands, aliases, keywords (Debian)
VLC Media Player – Configuring a HTTP Proxy (with Authentication)
(tested with VLC 2.0.6) 1) Menu: Tools, Preferences (CTRL+P) 2) At the bottom: Show Settings: [x] ALL 3) At the…
Handy OSX bash command collection – Part 2254
The famous ‘locate’ command, Graphical view of sub folders from the command line, Securely delete and purge a drive, Shutdown like a boss, Error Message Texts
Linux Power-Management Commands
Because when you need it, you never find it back :) Deactivates the power management and the screen blanking of…
How-To: Connecter un domaine GANDI avec un hébergement OVH
Etape 1: Enregistrer votre domaine GANDI dans les serveurs DNS OVH Cette étape permet de créer une entrée dans le…