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section tag OpenNTPD - now with OpenSSL support

| Pekka Helenius |  August 2, 2020 
Updated:  January 21, 2021 
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For a few weeks, I've been working on implementing OpenSSL support and vastly improved configurability to OpenBSD-based NTP daemon OpenNTPD. Both of which I have done now. OpenNTPD is written in C. See the implementation on GitHub - openntpd-openssl.

I run a Linux server infrastructure with time-critical daemons such as Kerberos and Bind9 DNS server. Therefore, I see it's essential to have a local, secure NTP server software.

section tag SQL database planning, development & usage

| Pekka Helenius |  February 2, 2020 
Updated:  February 11, 2021 
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Excel spreadsheet data processing is a familiar approach for everyone to handle local client data sets. However, for server-side data handing, centralized SQL databases are used. More modern NoSQL techniques are even better for big data due to horizontal server scaling possibilities.

In this post, I cover a basic SQL database lifecycle from client requirements specification to detailed database use and data analytics, using a fictional game tournament service as an example platform.

section tag Experiments with RAM adapters

| Pekka Helenius |  November 2, 2019 
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Do you have extra laptop RAM sticks lying around your house or workplace? Do you want to re-use them before throwing them into a trash bin? Well, there is a solution which might take your interest.

section tag Automating Windows Active Directory deployment

| Pekka Helenius |  October 8, 2019 
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Have you ever wanted to take a cup of coffee while installing Windows Active Directory?

I recently had one this kind of task which is why I decided to give control for semi-automated PowerShell modules & scripts, written from scratch. System administrator should supply parameters for the installation process to use. Otherwise, deployment of the whole AD: fully automated.

section tag Emergency control for servers

| Pekka Helenius |  September 6, 2019 
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Need a remote control for your physical servers but WOL (Wake-On-Lan) doesn't fit to your plans? Exactly my case!

In a case of emergency, such as a server not responding, I must have ability to control power states of my remote servers. Basic solution in such case is to physically reboot the server computer. But how to do it without physical access, and without WOL?

section tag Home Lab - First steps

| Pekka Helenius |  August 31, 2019 
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Home lab? Yes, first steps taken! This has been in my mind for some time. Why? First for learning purposes but it has potential for more in the future. Home network lab is not a same thing than large corporate network with multiple inter-connected sites, but it is a good start, anyway!

Home lab gives me an opportunity to get my hands on real stuff to see a blink of the physical side of network planning, giving more perspective for the whole process rather than only playing with logical (or virtually simulated) network topologies in network simulation software.

section tag Adventures in cloud

| Pekka Helenius |  August 13, 2019 
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One of the first goals for Fjordtek was setting up a basic cloud environment for clients to use. Security in mind, the network connections must be encrypted and trusted which is why self-signed certificates were out of question, not talking about plain HTTP connections.