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-robinkrens.nl - Linux Resources
-********
-
-This page lists some useful resources for a more in depth understanding on specific subjects. Assumed is that you have a basic understanding of Linux and Networking. If not, you might to start with one of the followings books
-
-       * http://linux-training.be - PDFs about the fundamentals, gives an overview of the most common tools and how to use them. PDFs contains some nice exercises.
-       * http://www.tldp.org - The Linux Documentation project. Look for the UNIX and Internet Fundamentals HOWTO. (Do you *really* know what happens when you turn on a PC?) 
-       * https://netfilter.org/documentation/HOWTO/networking-concepts-HOWTO.html - Elementary HOWTO about Networking. 
-
-
-Networking
---------
-A good way to understand more about networking is two setup two computers: a server and a client. And the play around with the tools. The following tools and documentation are extremely useful.  
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-Netcat
-~~~~~~
-Simple tool to open or connect to TCP or UDP ports and output data through these channels. Build and test proxies. Powerful for debugging. _Cryptcat_ is a similar tool, but with support for cryptography
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-Sendip
-~~~~~~
-Create and send IP, TCP or UDP packages. You are able to edit any value within these packages. 
-
-
-Iptables
-~~~~~~~~
-Although there is more abstract software to manage firewalls, like *ufw* on debian-based systems and *firewall-cmd* on redhat systems, Iptables will help you understand what actually happens during filtering, mangling or routing a package. https://www.frozentux.net/iptables-tutorial/iptables-tutorial.html has a structured approach in explaining _what happends when a package hits the firewall_. Pay extra attention to Network Address Translation. Here is another nice HOWTO: https://netfilter.org/documentation/HOWTO/NAT-HOWTO-5.html
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-
-
-Virtual Private Networks and Tunneling
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-Please have a look at <URL:./tunneling.html:tunneling.html>
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-Cheatsheets
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-Here are some good cheatsheets for commonly used tools
-
-* VI(M) - https://vim.rtorr.com
-* <URL:./files/git.pdf:GIT and GITHUB>