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You can find here all the tutorials. This website offers tutorials related to IT and technology.  

OpenVPN Server on Ubuntu Tutorial

OpenVPN is an open source SSL VPN, which works in many Linux distributions. Your VPN server will be accessable from several operating systems and smartphones. There 2 ways to get to an openVPN server, but here i will show you the easier way.  
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Fail2ban custom filter rule

This is tutorial shows how to add a Fail2ban custom filter rule for web applications e.g. joomla admin page, wordpress, etc. Fail2ban is needed to block brute-force attacks. Easiest explanation: this attack is performed when page is entered through trying passwords again and again till the right password was found. This will be avoided for your web application by this fail2ban custom filter rule.
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All tutorials related to Linux. Linux server administration, Linux security and more.    
All Tutorials related to FreeBSD. These are a little bit similar to other BSD-like distributions.        
Tutorials and information about everything related to the programming language Python.    
Everything related to the programming language Javascript and frameworks for Javascript.    
All tutorials and information related to Java, JSF and frameworks that are used in Java programming.    
Everything about programming in Android. Create your own smartphone app with Android.    
Web development stacks and programming languages (for example: MEAN, Angular, etc.), HTML and CSS.  
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