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From: =?ISO-2022-JP?B?GyRCPyJFRE01RzcbKEI=?= <ueda@raomen.net>
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Subject: [FreeBSD-net-jp 3762] ipfilter/ipnat NAT Box
 =?ISO-2022-JP?B?GyRCRmJJdCQrJGkkThsoQg==?= PPTP
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$B?"ED(B@Raomen.Net $B$H?=$7$^$9!#(B


$B!!:#$^$G(B ipfw/natd $B$G9=C[$7$F$$$?(B FreeBSD NAT Box $B$r(B ipfilter/ipnat $B$KJQ(B
$B99$7$?$H$3$m!"%f!<%6$+$i(B

	$B<RFb$+$i<R30$N8\5R%5!<%P(B(Windows2000 Server) $B$K(B PPTP $B@\B3$r(B
	$B;n$_$k$H(B NAT $B$,3]$+$i$J$$$G(B Private IP $B$N$^$^%Q%1%C%H$,(B
	$BN.$l$F$7$^$C$F$$$k(B

$B$H$$$&%/%l!<%`$,$"$j$^$7$?!#(B

$B!!$G!"(BWAN $BB&(B NIC $B>e$G(B tcpdump $B$r3]$1$F$_$?$H$3$m!"3N$+$K(B 10.0.0.xxx $B$H$$$C(B
$B$?%Q%1%C%H$,8+$($^$7$?!#L/$@$J!"$H;W$C$FD4$Y$F$_$?$H$3$m!"(B

	1. A $B$H$$$&%f!<%6$,(B B $B$H$$$&%[%9%H$K(B PPTP $B@\B3$9$k(B ($BLdBj$J$7(B)
	2. A $B$,(B PPTP $B$;$D$>$/$7$?$^$^!"(BC $B$H$$$&%f!<%6$,%[%9%H(B B $B$K(B PPTP
	$B!!!!@\B3$9$k$H!"(BTCP/1723 $B$OLdBj$,L5$$$b$N$N!"(BGRE $B%Q%1%C%H$K4X$7(B
	$B!!!!$F$O(BNAT $B$,3]$+$i$:$K(B Private IP $B$N%Q%1%C%H$,8+$($k(B

$B$3$H$,J,$+$j$^$7$?!#(BGRE $B$K(B Port $B$N35G0$,L5$$$+$iEv$?$jA0$@$m$&!"$H;W$C$?(B
$B$N$G$9$,!"(Bipfw/natd $B$G$O$G$-$F$$$?$N$K(B... $B$H8@$o$l$?$?$a!"(BGoogle $B$K$F(B 
"FreeBSD GRE NATD $B%;%C%7%g%s(B" $B$N%-!<%o!<%I$rMQ$$$FD4$Y$F$_$?$H$3$m!"0J2<(B
$B$N(B URL $B$K(B ipfw/natd $B$J$iBg>fIW!"$H$$$&5-=R$r8+$D$1$^$7$?!#(B

	http://www.netarc.jp/discussion/vpn-talk/old/msg00698.html


$B!!:#$N$H$3$m%f!<%6$+$i$O!V;EMM$J$i;EJ}$J$$$G$9$,(B...$B!W$H$O8@$o$l$F$$$k$N(B
$B$G$9$,!"(Bipfilter/ipnat $B$G$b2?$H$+$J$k$N$J$iAa5^$K=$@5$7$?$/!"$^$?$@$a$G(B
$B$"$l$P(B ipfw/natd $B$KLa$9$+(B... $B$H9M$($F$O$$$k$N$G$9$,!"3'$5$s$O$I$&$5$l$F(B
$B$$$k$N$G$7$g$&$+!)(B $B$d$O$j!V(Bipfw/natd $B;H$(!W$G$7$g$&$+$M!#(B

# ipfw/natd $B$@$H5R$,<+J,$G%a%s%F%J%s%9$7$F$/$l$J$$$N$G%?%@F/$-$7$J$$$H(B
# $B$$$1$J$/$F7y$J$s$G$9$h$M(B :p)$B!#(B


$B!!$"$H!"(Bipnat $B$N(B MAP $B$G@8@.$5$l$?F0E*$J(B NAT $B%k!<%k$N(B TTL $B$r@)8f$9$kJ}K!(B
$B$O$"$k$N$G$7$g$&$+!)!!(Bsysctl -a $B$G$6$C$H8+$?8B$j$G$OCM$r@_Dj$G$-$=$&$J(B
 MIB $B$,8+Ev$?$j$^$;$s$G$7$?!#(BTTL $B$,@)8f$G$-$k$H>/$7$O%f!<%6$NITK~$,<}$^(B
$B$k$N$G$9$,!"(BPPTP $B$G@\B3$7$?:]$N(B GRE $B$K4X$9$k%k!<%k$,7k9=D9$/(B(2$BJ,(B)$B;D$k$?(B
$B$a!"$3$l$r2?$H$+$G$-$J$$$b$N$+$H;W$$$^$7$F(B...


$B!!2?$+$465<x$$$?$@$1$l$P9,$$$G$9!#(B

-- 
$B?"EDM5G7(B <ueda@Raomen.Net>


