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Date: Fri, 25 May 2001 15:10:56 GMT
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To: FreeBSD-net-jp@jp.freebsd.org
From: Daisuke Yasuda <dyasuda@inoace.co.jp>
In-Reply-To: <018c01c0e4fc$7544ab60$120110ac@ontheroad>
References: <018c01c0e4fc$7544ab60$120110ac@ontheroad>
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Subject: [FreeBSD-net-jp 3118] Re: Firewall
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$B$3$s$K$A$O!"0BED$G$9(B
>
> $B;H$C$F(BFirewall$B$NFbB&$G%a!<%k%5!<%P!<$r$?$F$i$l$k$G$7$g$&$+!)(B
>
> $B9=@.?^$O<!$N$H$*$j$G$9!#(B
>
> LAN$B9=@.?^(B
>
> $B!!!!(B      Provider ------- The Internet
>     $B!!!!(B     |
>   $B!!!!(B +-----+-----+(aaa.bbb.ccc.ddd)
> $B!!!!(B   |prov-sever |
>    $B!!!!(B+-----+-----+(aaa.bbb.ccc.eee)
>        $B!!!!(B  |
>    $B!!(B +------+-----+<N/W:aaa.bbb.ccc.fff/27>
>       |Ether Switch|
>    $B!!(B +------+-----+
>              |
>       $B!!!!(B($B@lMQ@~(B)$B!!(BN/W:172.16.190.0/24
>          $B!!!!(B|
>    $B!!!!(B+-----+-----+(172.16.190.1)
>     $B!!(B | Router $B#B(B |
>        +-----+-----+(172.16.1.190)
>        $B!!!!(B  |
>   $B!!!!(B ------+-----------------------<N/W:172.16.1.0/24>
>       $B!!!!(B   |(172.16.1.18)
>       $B!!(B +------------+
>       $B!!(B | mail       |
>       $B!!(B +------------+
>
1,Firewall$B$C$F$I$l!)(B
2,EtherSwitch$B$,(BNAT$B$7$F$k$N!)(B
3,Prov-Server$B$C$F$J$K$7$F$k$N!)<+J,$,A`:n@_Dj$G$-$k$N!)(B

$B$H$+$$$m$$$m5?LdE@$,$"$j$^$9$,!"7kO@E*!J5;=QE*!K$K$O$G$-$k$G$7$g!#(B
$B$G$b!"<ALdFbMF$+$i$O!"<+A0$G%a!<%k%5!<%P!<$r1?MQ$9$k$N$O!"$b$C$HJY6/(B
$B$7$F$+$i$N$,!"<+J,$b2s$j$b9,$;$@$H;W$&!#(B

------------------------------------------------
Daisuke Yasuda = DY021JP
dyasuda@inoace.co.jp <-- $B5^$.$N%a!<%k$O$3$A$i$X(B
yasuda@ogaki-tv.ne.jp
-----------------------------------------------
