Tag Archives: ssl

Windows: Invoke-RestMethod =>The underlying connection was closed: An unexpected error occurred on a receive.

January 15, 2024 Michael Albert Leave a comment

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Hi,

Invoke-RestMethod or Invoke-WebRequest uses by default TLS 1.0. This protocal is outdated and would be not accepted by the most Webservers anymore.

Usually this results in the following error message:
The underlying connection was closed: An unexpected error occurred on a receive.

Continue reading Windows: Invoke-RestMethod =>The underlying connection was closed: An unexpected error occurred on a receive. →

openssl, Security

SSL/TLS: Enumerate all security ciphers a Web- or Mailserver offers

October 6, 2020 Michael Albert Leave a comment

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Hi,

you want to know which security ciphers a particular server supports?
Continue reading SSL/TLS: Enumerate all security ciphers a Web- or Mailserver offers →

VMware

VMware Workstation: Generate a new selfsigned SSL/TLS certificate

May 14, 2019 Michael Albert Leave a comment

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Hi,

the VMware Workstation does not provide a program or script to generate a new pair of key and selfsigned certificate.

If’ve written a batch file which builds a new one. The scripts assumes that the Workstation is installed in the default folder C:\Program Files (x86)\VMware\VMware Workstation and uses the openssl command delivered with the program.

Adjust the Countryname, State, etc. to your own needs. Config is based on the VMware Docs.

Continue reading VMware Workstation: Generate a new selfsigned SSL/TLS certificate →

Linux, Security

Debian: Setup owncloud with TLS (LetsEncrypt) and protected by AppArmor

December 11, 2015 Michael Albert Leave a comment

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Hi,

this Tuturial describes the steps to setup owncloud on top of debian/raspian with lighttpd as webserver and https encryption with certificates sign by Let’s encrypt campain.

Operating System

Install a minimal debian jessie system.

Login as root. On raspbian login as user pi change to root.
Continue reading Debian: Setup owncloud with TLS (LetsEncrypt) and protected by AppArmor →

VirtualBox

Virtualbox: Creating and controlling Virtual Maschines from command line

February 6, 2014 Michael Albert Leave a comment

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Hi,

VirtualBox offers a very powerful command inferface: vboxmanage. With vboxmanage you can create new virtual machine, add and modify harddisk and much more. All the things you could do in the GUI, and a lot more are also possible at command line. In this post I will create, modify, control and delete a complete virtual machine.

At the bottom of the post the whole script can be downloaded.
I used a debian linux system for my tests. To install the latest VirtualBox version use the following commands:

echo "deb http://download.virtualbox.org/virtualbox/debian wheezy contrib non-free" >> /etc/apt/sources.list
# Add Oracle Keyring
wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | apt-key add -
# Update repositories
apt-get update
# Install latest virtualbox version
apt-get -y install virtualbox-4.3
# Installing the Extentionpack for USB2 and RDP support
wget http://download.virtualbox.org/virtualbox/4.3.6/Oracle_VM_VirtualBox_Extension_Pack-4.3.6-91406.vbox-extpack
VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-4.3.6-91406.vbox-extpack

Continue reading Virtualbox: Creating and controlling Virtual Maschines from command line →

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