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Date: Tue, 18 Sep 2001 15:06:26 +0900
From: Tsuyoshi Ishikawa <hicora@basil.freemail.ne.jp>
To: FreeBSD-net-jp@jp.freebsd.org
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Subject: [FreeBSD-net-jp 3326] Re: about Private IP adress
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$B@P@n(B@$B2q<R$G$9!#(B

> 
> RFC 1918 $B$N(B 3. Private Address Space $B$K(B
> 
>    Because private addresses have no global meaning, routing information
>    about private networks shall not be propagated on inter-enterprise
>    links, and packets with private source or destination addresses
>    should not be forwarded across such links.
> 
> $B$H!">.J8;z$J$,$i(B should not $B$H$"$j$^$9$N$G!"(B
> $B9u$K6a$$%0%l!<$"$?$j$+$"(B? $B$H;W$C$F$^$9!#(B
> 

$B$J$k$[$I!#$=$&$G$9$M!#(B


$B$$$A$*2<5-$K:.F1$7$d$9$$Nc$HHf3S$7$FLO<0?^E*$K$7$F$3$^$7$?!#(B

$B%W%i%$%Y!<%H%"%I%l%9$r(BD$B$+$i(BC$B$^$G$r;YG[$9$k6H<T$,;H$&$H$$$&>l9g(B(CATV$B$,$h$/(B
$B;H$&<jK!(B)<D:--C:$B$,6H<T$N%M%C%H%o!<%/(B>

--A:internet----D:router-----B:gateway(natd)----C:(end user PC's)


B:$B$+$i(BC:$B$N4V$N$_$K%W%i%$%Y!<%H%"%I%l%9$r;H$$(BC:$B$+$i(BA:$B$K8~$+$C$?%Q%1%C%H$,(B
B:$B$rDL2a$9$k$H$-$KLa$j@h$N%Q%1%C%H$r(BB:$B$KJQ99$7$F(BA:$B$X$$$/(B
($B$5$i$K(BD:$B$G(BA$B$+$iMh$k$b$H$N=P$F$$$/%W%i%$%Y!<%H%"%I%l%9$N9T$-@h$b$7$/$OLa(B
$B$j@h%Q%1%C%H$rGQ4~$9$k(B)

$B$H$9$l$P(BA:$B$+$i(Btrace$B$r$+$1$F$b(BB$B$^$G$7$+E~C#$7$J$$$7%$%s%?!<%M%C%H$K$O=P$J(B
$B$$$N$G$9$,(B


yahooBB!$B$N>l9g(B<D:--C:$B$,6H<T$N%M%C%H%o!<%/(B>

-A:internet---D:router--(private address$B72$NCf7Q(B)---B:rooter---C:(end
user PC's)


C$B$K$O4pK\E*$K$I$N%Q%1%C%H$bDL$7%0%m!<%P%k%"%I%l%9$rM?$($k$N$J$i$PCf4V$NIt(B
$BJ,$,%$%s%?!<%M%C%H$KO*Dh$7$F$7$^$&!#(B


Tsuyoshi Ishikawa
hicora@basil.freemail.ne.jp



