Update README.md

README.md

-Will add a readme here soon... or later.
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+# NexDPI
+## Home Router shaping based (also) on Deep Packet Inspection gigabit capable.
+
+Nowadays almost everyone with a fast home connection, where for fast i mean 
+gigabit optical fiber fast, uses the router furbished by the ISP.
+
+I'm an old nerd, so, i want to use my own router and do fancy stuff with it!
+
+My home router is a Celeron J1900 2Ghz 4 core machine with 8GB of RAM and 
+4 gigabit ethernet.
+
+I found myself struggling to obtain a proper DPI and shaping policies using
+the Linux IP stack despite the machine being quite powerful for a router, 
+but eventually thanks to a long trial and error i've been able to make it work 
+without sacrifice the troughtput.
+
+Those scripts are some of the scripts i use on my own machine, they are rude, 
+somewhat hackish, but hey, they works for me, and you are free to try to adapt 
+them to your own machine if you like to. Use them at your own risks though!
+
+### NOTE ON LIMITING DOWNLOAD WITH TC
+
+As TC qdiscs and classes works on the outbound traffic (egress) on an interface,
+to limit the download traffic you can apply the rules on the internal interface 
+or, as many suggests, use a ifb virtual interface and using the redirect feature 
+of tc filters redirect the ingress of the WAN interface to the virtual ifb, 
+and then apply your limitation there.
+
+This is CRAP and a pain in the ass for performances, don't use it! 
+
+### HOT TO USE IT
+
+Soon or later (probably later. A long time later i mean!) i will write some 
+doc and/or a post explaining how i use those scripts. For the moment, the source 
+is your friend, and if you can't read a simple source code, 
+then just don't use it!
+
+### But why you are using rc.local, ifup-down and similar to execute the scripts?
+
+Yes, i don't use systemd. It's not installed on my machines. I'm not a fan, and
+i run my machines with Devuan GNU/Linux so i can get rid of that piece of crap 
+that is systemd.
+
+If you want to adapt it to use with systemd, do it, but don't expect me to 
+do anything for it now or in future.
+:wq
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