DevOps – Server and Technologies and virtualization

Let’s encrypt your server / (Bitnami Product Stack) – Updated!

I changed this tutorial on 2016-01-26 as I recognized, I missed to mention one of the config files, where you have to add the certificat files, too. The tutorial works with the final version of Let's encrypt, even when written in Beta phase. As I just wrote in a blog post before, Let's encrypt [...]

Sven Seiler2019-01-03T16:46:58+00:00Tags: certificate, encrypt, it, Let´s encrypt, security, server, ssl|

Let’s Encrypt is Trusted

Let´s encryptMit dem 19. Oktober werden die Zertifikate von Let´s Encrypt nun in allen wichtigen Browsern als vertrauenswürdig akzeptiert. Damit ist der Grundstein gelegt um eine weite Verbreitung finden zu können. Einige Jahre lang verwende ich nun schon Zertifikate von Startssl oder aber CAcert. Leider haben sich die Anbieter nie wirklich etablieren können. Mit Let´s Encrypt sehe [...]

Sven Seiler2019-01-03T16:46:58+00:00Tags: encrypt, it, Let´s encrypt, security, ssl|

Updating Amazon AWS Security Group via CLI

When there is need often to log in to your AWS hosted EC2 instance, and you care at least a bit about security, one will need to update the Security Group "Inbound rules" to allows SSH connection from your current IP address to your Amazon AWS hosted server. You have two option to do so: [...]

Sven Seiler2019-01-03T16:46:59+00:00Tags: amazon, aws, cli, devops, security|

Chocolatey

I lately stumpled upon "Chocolatey", that is according to its developers, "kind of like apt-get, but for Windows". Chocolatey makes use of the Windows powershell and is very easy to use. It is worth to get more into it. I used it so far to automate the installation of Vagrant based Windows Virtual machines and to [...]

Sven Seiler2019-01-03T16:46:59+00:00Tags: Chocolatey, devops, software, windows|

Vagrant behind a proxy server

If you are using Vagrant behind a proxy server, you should go for installation of vagrant-proxyconf. But how to install this plug-in when you are currently limited by a proxy? Set your proxy on Windows, open a command prompt and enter: set HTTP_PROXY=http://user:password@proxy.domain.tld:8080 set HTTPS_PROXY=https://user:password@proxy.domain.tld:8081 Set your proxy on Linux, open a command prompt and enter: [...]

Sven Seiler2015-10-12T00:53:54+00:00Tags: devops, proxy, vagrant|

Conquering new frontiers – Amazon EC2

Starting from today, this webpage will be available through Amazon EC2, powered by the “WordPress by Bitnami (HVM)” and is now relying completely on nginx. Bitnami Wordpress Instance I recommend the plug in All-in-One WP Migration for a painless transfer. This plug in save me maybe hours in migration.

Sven Seiler2019-01-03T16:47:08+00:00Tags: amazon, bitnami, cloud, ec2, server|

Microsoft IE6, IE7, IE8, IE9, IE10, IE11 and Edge

If you are in front end design and are even working for customers in the public sector, you have to most likely guarantee that the web page you are currently designing will be compatible to Microsoft Internet Explorer in all the multiple versions available. You may not need to work with IE6 or IE7, but the IE8 ("The Windows [...]

Sven Seiler2019-01-03T16:47:09+00:00Tags: browser, Edge, IE10, IE11, IE6, IE7, IE8, IE9, virtual machines, virtualization|

Windows 10 – 0xC1900101 – 0x20017 error

I am using my Lenovo T420S now since more than four years. This notebook is still comparable to current machines that are now on sale. It is equipped with a I7 processor and 16GB of RAM. In addition I added two Samsung SSDs during the years. I haven´t found any significant better notebook of that quality level since [...]

Sven Seiler2019-01-03T16:47:10+00:00Tags: 0x20017, 0xC1900101, bios, error, lenovo, microsoft, t420s, windows, Windows 10|

Solving performance issues with ESXi 6 (Gen8)

If you have installed to a newer version of ESXi on your Gen8 Micro Server and are now suffering from very low performance disk speed, try the following steps to downgrade to a former hpvsa-driver (scsi-hpvsa-5.5.0-88). Just follow these simple steps: Download the driver and unpack the archive named hpvsa-5.5.0-88.zip Stop all VMs that are currently running [...]

Sven Seiler2015-09-23T21:20:19+00:00Tags: esxi, gen8, virtual, virtual machines, vmware|

Detecting PHP email spam scripts on your server

In this article I am describing how to identify PHP scripts that are being used for email spamming through a Postfix mail server on an Debian based server. I just recognized last week an unnormal high workload on my server, causing the fast-cgi PHP instances not working well anymore. There was a noticeable delivery of HTTP 500 error [...]

Sven Seiler2019-01-03T16:47:10+00:00Tags: detect, hosting, php, script, security, server, spam|