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  1. tunecho é≡ make é╖éΘüB
    \begin{screen}\baselineskip12pt
\begin{verbatim}% make
\end{verbatim}
\end{screen}
  2. Winodw 1 é┼ tunecho é≡ root é┼Ä└ìsé╖éΘüBê°Éöé╚é╡üB âèâ^ü[âôé≡ëƒé╖é╞âvâìâOâëâÇé═ÅIù╣é╡é▄é╖üB
    \begin{screen}\baselineskip12pt
\begin{verbatim}...
  3. Window 2 é┼ netstat –i é≡ĵéΘé╞üAtun0 é¬î⌐éªé▄é╖üB ifconfig tun0 é╡é─é▌é─é¡é╛é│éóüB
    \begin{screen}\baselineskip12pt
\begin{verbatim}% /sbin/ifconfig tun0
tun0:...
...0.123.111.2 --> 100.123.111.8 netmask ffffffff
%
\end{verbatim}
\end{screen}

  4. 100.123.111.8 é╔ ping é╡é─é▌éΩé╬ò╘ôÜé¬ò╘é┴é─é½é▄é╖üB Window 1é┼ô«éóé─éóéΘ tunecho é≡Ä é▀éΩé╬ tun0 é═â_âEâôé╡é─ echo é═ò╘é┴é─é▒é╚é¡é╚éΦé▄é╖üB