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HOWTO: VMware Player as a remote console (VNC)
Goal: get a VNC client to access VMware VMs from a Linux-based PCSince I'm doing a lot of remote systems administration tasks due to the nature of my IT consulting work and since I'm also running Linux...
View ArticleSSH port-forwarding (Basics)
I think all of you are using SSH in your daily routines. However, do you use its full potential? Today's topic is the SSH port-forwarding feature and how it can be use to achieve some interesting...
View ArticleSSH port-forwarding (Intermediate)
In my previous blog entry I described some basic functionality of SSH in terms of port-forwarding. Now it's time for a little bit more complex stuff.In this article I'll highlight:(forward) piercing of...
View ArticleShould we use ‘sudo’ for day-to-day activities?
None of the systems I administer or supervise have ‘sudo’ installed and every time I answer a question on how to do privileged work on these systems (i.e. do tasks that require administrator...
View ArticleTransparent SSH host-jumping (Advanced)
In this brief article I am going to describe how I resolved a nagging issue I had with setting up access to hosts which are not directly reachable, but where you need to forward your connection through...
View ArticleBuilding a firewall? Simple and easy!
I strive for simplicity since I am a strong believer that achieving a goal with the most simplest solution looks elegant, proves that you have deep knowledge on the subject, and overall is beautiful by...
View ArticleRaspberry Pi 3 toolchain on CentOS 7
I heard a lot about Raspberry Pi boards but until now I had no need nor time to work with one. However, recently I purchased a Dodge Journey R/T and found that although I love the car I am so...
View ArticleSSH: Interactive ProxyCommand
I was involved in the creation of the sshephalopod project, which is an attempt to build an enterprise level authentication framework for SSH authentication using the SSH CA feature. The project is...
View ArticleTransparent SSH host-jumping (Expert)
A while ago in the Transparent SSH host-jumping (Advanced) post I described a technique on how one could jump quite effortlessly through a chain of intermediate hosts. However, there was a catch: the...
View ArticleDynamic resolution of upstream servers in nginx
Many of my clients are running application stacks consisting of nginx plus some kind of scripting engine behind it (be it PHP, Ruby, or something else). The architecture I designed for this kind of...
View Articlenginx + a backend with a dynamic IP (e.g. AWS ELB)
Recently, I wrote about the dynamic resolution of upstream servers in nginx which was achieved by quite an intrusive patch to the core nginx module. The patch was invented a while ago and was working...
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