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Date: Sun, 22 Jul 2001 02:10:11 +0900
To: FreeBSD-net-jp@jp.freebsd.org
From: Kana Akira <kana@mail.netwave.or.jp>
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Subject: [FreeBSD-net-jp 3239] Re: IPFW+NATD
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$B2CL>(B $B$G$9!#!!A}ED!w%M%/%9%H%3%`MM!"1J0fMM!!$O$8$a$^$7$F!#(B

$BA}ED!w%M%/%9%H%3%`(B $BMM$N$40U8+$h$j!'(B

>  $B:G6a%[%9%H%Y!<%9(Bfirewall $B$,0lHV$$$$$s$8$c$J$$$+$H;W$$9~$s$G$$$k!#(B

$B$d$O$j!"$=$&$G$9$+!#!!(BFirewall$B$r@hF,$KF~$l$k$@$1$G#O#K$H$$$&$o$1$K$O(B
$B$$$-$^$;$s$+$M!J$=$&$$$&0UL#$G$9$M!)!K(B

>$B!&(BMAIL$B%5!<%P!J7s(BDNS+WWW+POP3$B!K$O(B192.168.1.20 $B$KCV$/(B
>$B!&(Bipfw $B$r$.$C$A$j@_Dj$7$FEv3:%^%7%s$,$N$C$H$i$l$F$b(B192.168.1.0/24 $B$KBP(B
>  $B$9$kF'$_Bf$K$O;H$($J$$$h$&$K$9$k(B
>
>$B$C$F46$8$K$7$^$9$M!#(BNAT $B$r$$$l$FJ#;(2=$9$k$N$O$a$s$I$/$5$/$"$j$^$;$s!)(B

$B3N$+$K$=$&46$8$k$N$G$9$,!"(Bipfw$B$N8!F$$N$?$a9=C[>pJs$r(BWeb$B$G=8$a$F$$$?$i(B
kernel$B$G(Bbpf$B$r;H$($J$$$h$&$K(Bconfig$B$9$Y$7!"$H$$$&$N$,$"$j$^$7$?!#(B
$B$3$l$C$F$=$&$9$Y$-$J$s$G$7$g$&$+!)!!(Bmail$B%5!<%P$d(BWWW$B%5!<%P$G%H%i%V%kD4::(B
$B$r$9$k$H$-$K(Btcpdump$B$9$k$3$H$,$"$j$=$&$G!"(Bbpf$B$OF~$l$F$*$-$?$$$s$G$9$,!#(B

$B$^$?(Bmail$B%5!<%P$d(BWWW$B%5!<%P$N%5!<%P%=%U%H$NF~$lBX$($d%^%7%s<+BN$N:F9=C[(B
$BF~$lBX$($J$I$9$k$H$-$O(BFirewall$BItJ,$OJL%^%7%s$GFHN)$5$;$F$*$$$?$[$&$,(B
$B$d$j0W$$$h$&$J5$$,$7$FJ,$1$F$_$^$7$?!#!!(B

$B$^$?>h$C<h$i$l$?%5!<%P$N(Bipfw$B$N@_Dj$b$$$8$i$l$F$7$^$C$?$i4JC1$KB>$N(B
$B%5!<%P$d%M%C%H%o!<%/$K%"%/%;%9$5$l$F$7$^$$$=$&$G!&!&!&!#(B
$B>h$C<h$i$l$F$bBg>fIW$J$h$&$K(Bsource$B$d%3%s%Q%$%i$r>C$7$F$*$/$H$+%U%!%$%k(B
$B$NJQ99$,=PMh$J$$$h$&$J@_Dj$K$7$F$*$/$H$+$GBP=h$G$-$=$&$J5$$b$7$^$9$,!"(B
$B:#$N;d$N5;NL$G$O$=$l$i$r40`z$K$G$-$k<+?H$,$"$j$^$;$s!#(B
$B$G>/!9J#;($G$b!"J,$1$?$[$&$,L5Fq$+$H;W$$$^$7$?!#(B
$B3'$5$s%3%s%Q%$%i$H$+$b:o=|$7$F(BFirewall$B%5!<%P$rB$$i$l$F$$$k$s$G$7$g$&$+!)(B

$B!V%[%9%H%Y!<%9(Bfirewall$B!W$O:#$^$GF,$KIb$+$S$^$;$s$G$7$?!#(BFirewall$B$O#1Bf(B
$BJL$KCV$/$H$7$F!"(BMAIL$B%5!<%P$d(BWWW$B%5!<%P$b$=$l$>$l(Bipfw$B$rF~$l$F8G$a$k$H$$$&(B
$B$N$b$$$$$+$b$7$l$^$;$s$M!#(Bipfw$B"*(Bnatd$B"*(Bipfw$B$HO"$J$C$F$-$?$iB.EY$OCY$/$J(B
$B$k$N$G$7$g$&$+!)!!:#2s8!F$$7$F$$$k(Bipfw$B$d(Bnatd$B$NB.EY$b$H$F$b5$$K$J$j$^$9!#(B
$B:#;~$N%Q%=%3%s$GAH$a$P(Bipfw$B$d(Bnatd$B$G$NB.EYDc2<$dIi2Y$C$F5$$K$7$J$/$F$b$$(B
$B$$$b$N$G$7$g$&$+!)(B

====================================================================

$B1J0f(B $BMM$N$40U8+$h$j!'(B

>$B$*$=$i$/%V%m!<%I%P%s%I%k!<%?$K(BDHCP$B%5!<%P$r$5$;$F$$$k$N$G(B
>$B$3$N$h$&$J9=@.$r9M$($?$N$G$O$"$j$^$;$s$+!#(B

$BA4$/$=$N$H$*$j$G$9!#$3$3$G$"$^$j$K$b3Z$r$7$9$.$?$N$GJL$N$H$3$m$K$7$o4s(B
$B$;$,$-$FJ#;($K$J$C$F$7$^$C$?$N$+!&!&!&$3$N3Z$G4JC1$H$$$&$N$b<N$F$,$?$$(B
$B$N$G$9$,!#(B

>DHCP$B$r$$$l$F!"(BWIN$B$N%/%i%$%"%s%H$O!"(B192.168.5.0/24$B$G%W%i%$%Y!<%H(B
>$B$=$N>e$G!"(B192.168.1.0/24$B>e$K%a!<%k!&(BDNS$B!&(BPOP3$B$rF~$l$l$P(B

$B$d$O$j$3$N9=@.$,0lHLE*$J$s$G$7$g$&$+!#(B
Windows$B7O$N%/%i%$%"%s%H$KBP$7$F(BDHCP+natd$B$r(BFreeBSD$B!J(B+ipfw$B!K$G%5!<%S%9$9(B
$B$k$H$7$F!"(BNetMeeting$B$d(BChat$B7O%W%m%0%i%`!"$=$NB>%M%C%H%o!<%/%2!<%`!)7O$J(B
$B$I$rDL$9$?$a(Bipfw$B$N(Brule$B$G6lO+$9$k$J$s$F$3$H$O$J$$$N$G$7$g$&$+!)(B
$B$=$N$"$?$j$,NI$/8+$($J$$$N$G!V0lHLE*$J9=@.!W$K$?$a$i$$$r46$8$^$9!#(B
$B6HL3$G3$30$H(BNetMeeting$B7O$b;H$$$^$9$7!"$G$-$k$@$13F<+$N%Q%=%3%s$+$i$O(B
$B@)8BL5$/%$%s%?!<%M%C%H$H$d$j<h$j$G$-$k$h$&$K$7$F$*$-$?$$$N$G$9!#(B
$B!J"((B $B%m!<%+%k%k!<%?$G%^%9%+%l!<%I$7$F$$$k$+$i$K$O@)8B$O$"$j$^$9$,!#!K(B

