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Date: Tue, 14 Sep 1999 13:16:27 +0900
From: Yoshio Funaki <yoshio@apl.pref.akita.jp>
To: FreeBSD-net-jp@jp.freebsd.org
In-Reply-To: <199909130733.QAA01655@U1-PC-3.hitachi-ul.co.jp>
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X-Distribute: distribute version 2.1 (Alpha) patchlevel 24e+990727
X-Sequence: FreeBSD-net-jp 1911
Subject: [FreeBSD-net-jp 1911] Re: Does self-ip_forwarding NAT exist ?
Errors-To: owner-FreeBSD-net-jp@jp.freebsd.org
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$BOBEDMM!"$d$^$*$+MM(Jreply$B$"$j$,$H$&$4$6$$$^$9!#(J
net-jp$B$K?6$i$;$i$l$?A%LZ!w=)ED8)N)?^=q4[$G$9!#(J ^^;

>$BOBED$G$9!#(Jnet-jp $B$K?6$i$;$?K\?M$G$9!#(J
>$B$G$b!"%M%C%H%o!<%/4X78$O>\$7$/$J$$$G$9!#(J(^^;
(snip)>

$BOBEDMM$h$j!'(J
>$B$3$$8@$&%"%W%j%1!<%7%g%s$,M-$k$+$OCN$j$^$;$s$,!"!X$3$l$O!"%M%C%H%o!<%/%]%j(J
>$B%7!<$rJQ99$9$k!Y$H8@$&$3$H$G$9$+(J? 
>$B$J$i$P!"(Jfirewall A $B$rGQ;_$7$F!"C1$J$k%k!<%?$KJQ99$7$?J}$,3Z$@$H;W$$$^$9$,!#(J
>$B$=$7$F!"?75,$KF3F~$9$k%5!<%P$r(J subnet B $B$KCV$/!#$H8@$&Ez$($G$O$@$a(J?

subnetA$B$OJL(JLAN$B$@$H=q$-$^$7$?$1$I!"K\Ev$O(JsubnetA$B$+$i(JsubnetB$B$K9T$1$A$c(J
$B$@$a$J$/$i$$$N%;%-%e%j%F%#!<$,I,MW$J$s$G$9$h!#(J
$B!t!!9T$1$A$c$&$h$&$K$7$?$N$O;d$G$9$,!&!&!&!&(J ^^;
$B$=$N$?$a(JsubnetA$B$H(JsubnetB$B$O(Jfirewall$B@\B3$G!"$7$+$b(Jip forwarding$B$7$?$/$J$$$s$G$9!#(J

$B$d$^$*$+MM$h$j!'(J
>$B$h$/$o$+$C$F$J$$$N$G$9$,(J
>natd $B$N(J redirect_address/redirect_port $B$r;H$($P(J
>$B$G$-$k$s$8$c$J$$$G$7$g$&$+!#(J

>> $B$^$?!"2>$K(Jfirewall A,firewall C$B$G(JIP$B$r(Jforward$B$7$J$1$l$P$J$i$J$/$J$C$?>l9g(J
>> server$B$H$*OC$7$9$k%W%m%H%3%k$N$_(JNAT$B$GDL$9$3$H$K$7$?$$$N$G$9$,!"$=$N$h$&$J(J
>> $B@_Dj$O2DG=$G$7$g$&$+!#(J

>$B$3$l$O2?$i$+$NJ}K!$G(J nat $B5!G=$r@_Dj$7$?$"$H(J
>$BDL$7$?$/$J$$%Q%1%C%H$r(J ipfw $B$GC!$-Mn$H$9$h$&$K$9$l$P!"4JC1$G$9(J

$B$3$3$s=j$,CN$j$?$+$C$?$H$$$&$+!"$h$/$o$+$i$J$+$C$?$N$G$9!#(J
$B$$$m$$$m;qNA$rEv$?$k$H!"!V(JNAT$B$r@_Dj$9$k$H!"(JNIC$B$K$H$s$G$-$?$9$Y$F$N(J
IP$B$r5[$$9~$s$GH?BPB&$N(JNIC$B$K(Jforward$B$9$k!W$H$7$+FI$a$J$+$C$?$N$G(J
$B!V(Jipfw$B$G(JIP$B@Z$l$k$s$+!)!W$H$$$&$3$H$,$o$+$i$J$+$C$?$s$G$9!#(J
$BA0$K=q$$$?$h$&$K!"4pK\E*$K(Jdelegate$B$GI,MW$J%W%m%H%3%k$ODL$7$F$^$9$s$G(J
ipfw$B$G$H$j$"$($:ITI,MW$J(JIP$B$OA4ItMn$H$9$3$H$K$7$F$7$^$*$&$+$H9M$($F$$$^$9!#(J

$B$A$J$_$K!"$h$/(JNATD$B$N@_DjNc$H$7$F=q$+$l$F$$$k(J
add divert divert_port$B!!(Jall from any to any$B!!(Jvia NIC_add 
$B$H$+$$$&$d$D$r(J
add divert divert_port hoge_proto from subnetA to subnetB via NIC_add
$B$H$+$K$9$l$P#O#K$G$9$h$M!)(J

>$B$?$@OBED$5$s$b$*$C$7$c$C$F$k$h$&$K(J
>$B$d$C$F$k$3$H$O(J gateway + $B%Q%1%C%H%U%#%k%?%j%s%0(J $B$H(J
>$B$[$H$s$IJQ$o$i$J$$$s$G$9$1$I!"%]%j%7!<$K0cH?$7$J$$$s$G$9$+!)(J

$B$[$s$H$O%@%a$G$9!#$G$9$s$G7QB3$7$F(JApp.gateway$B7?$N(JNAT$B$rC5$=$&$+(J
$B$H;W$C$F$$$^$9!#(J
$B!t!!$3$N%W%m%H%3%k$rDL$9$+$I$&$+$b4^$a$F:F9M$7$F$_$^$9!#(J
$B!t!!$?$@!"6HL37O$N$b$N$J$N$G!"DL$5$6$k$rF@$J$$$+$J$!!&!&!&(J

$BA%LZ!!4nIW!!(Jyoshio@apl.pref.akita.jp
