Dynamic DNS

Hi Folks! It has been long time, I have not posted anything since December.  Actually I had to do many things. I was battling upkeep of Company Servers and upgrading them. But during that time  I learned many things and I would like to share  with you all. In this post I will introduce you […]

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Measuring a Temperature with DS18B20

DS18B20 is a digital temperature sensor which measures temperatures from -55°C to +125°C. It uses 1-Wire communication protocol. We have only one data pin for sending and receiving data. For more information see DS18B20 datasheet. In this post I will use Raspberry PI-III as a micro controller. For data pin I chose GPIO26. Before using […]

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Redirecting http to https

Do you have  a SSL certificated web site and your audience still connects you via  http because of their habit ? Easy way to handle this problem is redirecting http requests to https. By doing that any http requests are redirected to the https. To do that we will use Apache web server (httpd RHEL,CentOS). […]

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Port Knocking

Port knocking is one of hardening method to prevent unauthorized user access the services. This method ability to externally open ports that, by default, keep closed by firewall. It works by sending  TCP packets to predefined closed ports in right order. In my virtual environment, I have two Linux based systems one is Debian8 and […]

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Cyberchondriac

Today’s new word  is Cyberchondriac. Cyberchondriac, someone who looks up medical advice on the Internet for every symptom  they have  and get anxious because they think they have serious illness.

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Free SSL Certificate

Q: Is is possible to get free SSL certificate, which is supported by modern web browsers such as Chrome, Mozilla Firefox, IE etc,. A: Actually, yes you can have free green bar SSL certificates which is supported by modern web browsers. Let’s Encrypt is a free, automated, open Certificate Authority. But before you have SSL […]

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Hello world!

Welcome to WordPress. This is your first post. Edit or delete it, then start blogging!   RewriteEngine On RewriteCond %{SERVER_PORT} 80 RewriteRule ^(.*)$ https://example.com/$1 [R=301,L]

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