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From: chores@him.ne.jp
Date: Thu, 10 Jan 2002 14:32:54 +0900
To: FreeBSD-users-jp@jp.FreeBSD.org
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Subject: [FreeBSD-users-jp 66374] Re: natd =?ISO-2022-JP?B?GyRCJE4bKEI=?=
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$BDMED$G$9!#(B
$B<+8J%l%9$G$9!#(B
$B9=@.?^F~$lK:$l$H%M%C%H%o!<%/E*$KITL@3N$JItJ,$,$"$j$^$7$?$N$G!"2~$a$F=q$-(B
$BD>$7$^$9!#(B

$B@EE*(BNAT$B$r@_Dj$7$F$$$k$N$G$9$,!";W$$DL$j$N@_Dj$,=PMh$:$K5M$^$C$F$*$j$^$9!#(B

$B$d$j$?$$$3$H$O!"(B192.x.x.a $B$+$i(B 192.x.x.b:80 $B$K%"%/%;%9$9$k$H(B 
210.x.x.x:80 $B$K@\B3$9$k$H$$$&@_Dj$G$9!#(B

+-----------+     +-------+
| 192.x.x.a |     |       |
| Windows   |--+  |       |
+-----------+  |  | Cisco |     +-----------+
               +--| Router|-----| 210.x.x.x |
+-----------+  |  |       |     | FreeBSD   |
| 192.x.x.b |--+  |       |     +-----------+
| FreeBSD   |     |       |
+-----------+     +-------+
        192.x.x.0/24     210.x.x.0/24

$B$=$3$G!"(B
| # ipfw add 100 divert 8888 tcp from 192.x.x.a to 192.x.x.b 80
| # natd -p 8888 -a 192.x.x.b -redirect_port tcp 210.x.x.x:80
|  192.x.x.b:80 -v
$B$H$7$F$_$?$N$G$9$,!"(B
| In  [TCP]  [TCP] 192.x.x.a:4719 -> 192.x.x.b:80 aliased to
|           [TCP] 192.x.x.a:4719 -> 210.x.x.x:80
$B$N$h$&$K$J$C$F$7$^$$$^$9!#(B

jman natd $B$K$h$k$H(B
| -alias_address | -a address 
| ($BCfN,(B)
|	$B=PNO$5$l$kA4%G!<%?$N%=!<%9%"%I%l%9$O(B address $B$K=q49$($i$l$^(B
|	$B$9!#(B
$B$H$"$j$^$9$N$G!"(B
| In  [TCP]  [TCP] 192.x.x.a:4719 -> 192.x.x.b:80 aliased to
|            [TCP] 192.x.x.b:???? -> 210.x.x.x:80
$B$N$h$&$K!"%=!<%9%"%I%l%9$,=q$-49$($i$l$k$3$H$r4|BT$7$F$$$^$7$?!#(B

$B2?$+!"@_Dj$,4V0c$C$F$$$k$H$O;W$&$N$G$9$,!"9T$-5M$^$C$F$7$^$$$^$7$?$N$G<1(B
$B<T$N3'MM!"$465<($*4j$$$$$?$7$^$9!#(B

$B@EE*(BNAT$B$O=i$a$F;H$&$N$G!"!V$d$j$?$$$3$H!W$H!V$d$C$F$$$k(B($B@_Dj$7$F$$$k(B)$B$3(B
$B$H!W$,:,K\E*$K4V0c$C$F$$$k$+$b$7$l$^$;$s!#$b$7$=$&$G$7$?$i!"$I$N$h$&$J@_(B
$BDj$r9T$&$Y$-$+$r$465<($$$?$@$1$k$HBgJQ=u$+$j$^$9!#(B

-- 
$B0J>e!"$h$m$7$/$*4j$$$$$?$7$^$9!#(B
 <chores@him.ne.jp>
