# HG changeset patch
# User Alessio Caiazza <nolith@abisso.org>
# Date 1257269893 -3600
# Node ID 9125f28806372e5febd502e7c41478a9053d664d
# Parent  35a9caac5cef6d982e3d6f5795f0e23cae75de54
Tunneling, proto-41

diff -r 35a9caac5cef6d982e3d6f5795f0e23cae75de54 -r 9125f28806372e5febd502e7c41478a9053d664d Presentazione.tex
--- a/Presentazione.tex	Thu Oct 29 19:05:14 2009 +0100
+++ b/Presentazione.tex	Tue Nov 03 18:38:13 2009 +0100
@@ -1097,7 +1097,7 @@
 	\pause
 	\begin{colorblock}{Come viene usato oggi il reverse DNS?}
 		\begin{itemize}
-		\item Controllo SPAM per i mail server
+		\item Controllo SPAM per i server mail
 		\item Funzionalità di logging 
 		\end{itemize}
 	\end{colorblock}
@@ -1138,6 +1138,82 @@
 
 % section automatismi_e_routing (end)
 
+\section{Tunneling} % (fold)
+\begin{frame}[t]\frametitle{Tunneling}
+\begin{colorblock}{Scopo}
+	Le tecniche di tunneling consentono di bypassare tronconi della rete che non 
+	supportano IPv6 incapsulando il pacchetto in uno o pi\`u datagrammi IPv4.
+\end{colorblock}
+\pause
+\vspace{.5cm}
+\begin{colorblock}{Metodi}
+	\begin{itemize}
+	\item<2-> Tunneling a livello Rete (\texttt{proto-41})
+	\item<3-> Tunneling a livello Trasporto (\texttt{AYIYA})
+	\end{itemize}
+\end{colorblock}
+\end{frame}
+
+\begin{frame}[shrink]\frametitle{Tunneling a livello Rete - \texttt{proto-41}}
+	\begin{colorblock}{\texttt{proto-41} (rfc3056)}
+		Noto anche come \emph{6to4} implementa la tecnica IPv6-in-IPv4 che consiste nell'inserire
+		il pacchetto completo IPv6 come payload di uno o più pacchetti IPv4.
+	\end{colorblock}
+	\pause
+	\vspace{.5cm}
+	\begin{center}
+	\begin{bytefield}{32} 
+		\wordbox{1}{Frame Ethernet}\\
+		\wordbox{1}{Header IPv4}\\
+		\wordbox[lrt]{1}{Pacchetto IPv6} \\ 
+		\skippedwords \\ 
+		\wordbox[lrb]{1}{} \\
+	\end{bytefield}
+	\end{center}
+\end{frame}
+	
+\begin{frame}[t]\frametitle{Tunneling a livello Rete - \texttt{proto-41} (cont.)}
+
+		\begin{colorblock}{Tunneling automatico (senza configurazione)}
+ 		Si cerca di raggiungere un \emph{relay router IPv6} (\texttt{192.88.99.1} anycast IPv4) in grado di instradare il nostro pacchetto in modo nativo. \\
+	 	A questo scopo è stata riservata la rete \texttt{2002::/16} 
+	 	che associa ad ogni indirizzo IPv4 un prefix di 48 bit composto
+	 	da \texttt{2002} più i 32 bit dell'indirizzo IPv4 convertito in esadecimale.\\
+		\end{colorblock}
+		\pause
+		\vspace{.15cm}
+		\begin{center}
+		\begin{tabular}{c c l}
+		       & \tiny{32 bit} & \\
+		       & $\overbrace{ {\color{chameleongreen1}\texttt{192.0.2.42}} }$ & \\
+		       &  $\downarrow$ \tiny{to hex} & \\
+		$\underbrace{\texttt{2002}}$: & {\color{chameleongreen1}\texttt{c000:022a}} & \texttt{::/48} \\
+		\tiny{16 bit} & &
+		\end{tabular}
+		\end{center}
+	
+\end{frame}
+
+\begin{frame}[t]\frametitle{Tunneling a livello Rete - \texttt{proto-41} (cont.)}
+	\begin{colorblock}{Tunneling non automatico (con configurazione)}
+	Il proto-41 può essere anche usato in modo non automatico per collegare
+	due punti della rete di un AS che non dispongono di 
+	router abilitati al traffico IPv6.  \\
+	In questo caso è necessario configurare dei punti di accesso agli estremi che 
+	intendiamo collegare per gestire la trasformazione IPv4$\leftrightarrow$IPv6.
+\end{colorblock}
+
+\end{frame}
+
+
+\begin{frame}[shrink]\frametitle{Tunneling a livello Rete - \texttt{proto-41} (cont.)}
+\begin{colorblock}{Tunneling non automatico}
+	\input{protocol41}
+\end{colorblock}
+
+\end{frame}
+% section tunneling (end)
+
 \section{Implementare IPv6}
 
 \subsection{Tunnel Broker}
diff -r 35a9caac5cef6d982e3d6f5795f0e23cae75de54 -r 9125f28806372e5febd502e7c41478a9053d664d protocol41.tex
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/protocol41.tex	Tue Nov 03 18:38:13 2009 +0100
@@ -0,0 +1,466 @@
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+\pgfsetfillcolor{dialinecolor}
+% was here!!!
+\definecolor{dialinecolor}{rgb}{0.000000, 0.000000, 0.000000}
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+% was here!!!
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+}
+% setfont left to latex
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+% setfont left to latex
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+\definecolor{dialinecolor}{rgb}{0.000000, 0.000000, 0.000000}
+\pgfsetfillcolor{dialinecolor}
+% was here!!!
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+}
+% setfont left to latex
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+\pgfsetstrokecolor{dialinecolor}
+\node[anchor=west] at (27.840000\du,8.707500\du){protocol 41};
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