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Date: Mon, 1 Mar 1999 16:57:48 +0900 (JST)
From: Minoru Oikawa <mino@bb.imagica.co.jp>
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Subject: [FreeBSD-net-jp 1404] Re: subnetmask
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 $B$*$$$+$o$G$9!#(B
 $B$J$s$+0{$_9~$_$,$($i$$B.$$$N$G$S$C$/$j!#(B

# $BC1$KF,$,NI$$$N$+!D$8$D$OA4ItCN$C$F$F<ALd$7$F$k$N$+$b(B($B>P(B)

> Date: Sun, 28 Feb 1999 18:46:01 +0900
> From: "Kono Ken'ichi" <s96355kk@sfc.keio.ac.jp>
> Message-Id: <36D910592BC.9A32S96355KK@ma4.justnet.ne.jp>

> $B!!$=$&$G$9!#%[%9%H(B1$B$r@_Dj$7$?;~!"(B/20$B!!$N;v<B$rKM$OCN$j$^$;$s$G$7$?!#(B

 $B$U$`$U$`!#(B
 $B7P0^$H$7$F$=$&$@$C$?$3$H$+$i!"<ALd$,$"!<$$$&$U$&$K$J$C$?$C(B
$B$F;v$G$9$M!#$h$/$o$+$j$^$7$?!#(B

 $B$7$+$7!"8+$:CN$i$:$N?M!9$K<ALd$9$k;~$O!"!V:#<+J,$,GD0.$7$F(B
$B$$$k>u67!W$rA4$F=P$9$N$,NI$$%^%J!<$H$$$&>lLL$b$"$k$G$7$g$&$M!#(B

# $B$b$A$m$s!"=P$5$J$$$N$,NI$$$H$$$&>lLL$b(B

> >  /masklen $B$N5-K!$H(B mask $B$r$0$A$c$0$A$c$K:.$<$F=q$/$N$ONI$/$J(B
> > $B$$$G$9!#$I$C$A$+$K$9$k!"$b$7$/$OA4$FJ;5-$9$k!#(B
> $B!!$=$&$$$&$b$N$J$s$G$9$M!#(B

 $B$F!"$$$&$+!"%a!<%k$OJ8;z>pJs$J$s$G$9$,!"$3$&$$$&$N$ON.$7$F(B
$BFI$`;~E@$G$O?^7A$N%Q%?!<%s$H$7$FG'<1$7$,$A$J$N$G!";k3PE*$K0z$C(B
$B$+$+$j$,$"$k$H!V$&$%7y$J%a!<%k!D!W$H$$$&46>p$,F~$C$F$7$^$&!#(B

# $B$3$3$K=q$$$?;v$N:,$C;R$O!"%M%C%H%o!<%/5;=Q$NOC$H0c$&$G$9(B
# $B$?$H$($P(B mino $B$N=q$/J8$O!V!"!W$,B?$/$FFI$_$K$/$$!"$H$+!#(B

> > >  $B$G$b!"$A$c$s$H%M%C%H%o!<%/!J%j%s%/%9%F!<%H!K$O3NN)$5$l$F$$$F!"(B
> >  $B$3$l!"2?(B?
> $BJ[$7$F$/$@$5$$!#4*J[$J$i$s$C$F!)(B

 $B$=$s$J;vL5$$$G$9$h!#(B

> >  $B2?$G2?$rD4$Y$?$+=q$+$J$$$H(B context $B$K$h$C$FH=CG$9$k$3$H$9$i(B
> $BNc$($P!"(Bwww.jp.freebsd.org$B!!$r%V%i%&%6$G8+$K9T$1$k$H$$$&0UL#$G;H$$$^$7$?!#(B

 $BD>@\E*$+$D6qBNE*$@!#$3$NI=8=$,$b$C$H$bNI$$$+$H;W$$$^$9!#(B

# ping $B$O$I$&$G$9$+!"$H$+99$K<ALd$,Mh$?$H$7$F$b!"$d$C$F$J$$(B
#$B$3$H$r@h2s$j$7$F=q$/;v$O=PMh$J$$$7$M!#(B

> $B!!$J$k$[$I!"%j%s%/%9%F!<%H$N<B:]$N0UL#$O!"(Bnetstat -f inet$B!!(B
> $B$N7k2L$J$N$G$9$M!#CN$j$^$;$s$G$7$?!#(B

 $B!D$%$%!"(BFreeBSD $B$G!V%j%s%/%9%F!<%H(B($B7k9g$N>u67(B)$B!W$H$$$C$?$i(B
TCP $B$N%3%M%/%7%g%s$NA+0\$0$i$$$7$+;d$NIO<e$JF,$G$O;W$$Ib$+$P(B
$B$J$+$C$?!"$H$$$&DxEY$N0UL#$G$9!#$o$?$7$O85%O!<%I20$G%M%C%H%o!<(B
$B%/$N@lLg2H$G$O$J$$$N$G!#(B

 $B%9%F!<%H(B($B>u67(B)$B$C$F$3$H$OJQ2=$9$k;v$,A0Ds$G$7$g$&$7!#$H$J$k(B
$B$H$=$l$OB>$K$b?'!9M-$j$=$&!D$G$7$g(B?
 $B6qBNE*$K$I$s$J>u67$K$"$k$+$,FI$_<h$l$J$+$C$?$N$G!";W$$IU$/(B
$BNc$r$"$2$F3NG'$7$h$&$+$H;n$_$^$7$?!#(B

> > > $BC<Kv#1$NB0$9$k%;%0%a%s%H$O$b$A$m$s!"$=$N30$K=P$k$3$H$b=PMh$^$9(B
> >  $B5U$J$i!"FCDj$N>r7o$G%H%i%V%k$K$J$k$s$@$m$&$1$I!#(B

 $B$3$N!V5U!W$O!"(Bnetmask $B$,69$$J}$K4V0c$&$N$G$J$/!"9-$$J}$K4V(B
$B0c$($k!"Nc$($P$^$5$K(B /20 $B$H$+(B /16 (!) $B$H$+$7$F$7$^$&$H!"$[$H(B
$B$s$I$N%[%9%H$HDL?.$G$-$=$&$K$J$$!"$r0U?^$7$F=q$-$^$7$?!#(B

> > > $B!!$3$l$O!"KM$,!"(B/etc/rc.conf$B!!$K$*$$$F!"(Bdefault wateway$B!!(B192.168.36.1$B!!$r(B
> > > $B@_Dj$7$F$$$k$+$i$@$H;W$$$^$9!#!J(BFreeBSD2.2.8Release$B$r;HMQ$7$F$$$^$9(B) 
> >  $B$o$+$i$J$$!#(B
> $B!!5U$K$I$&$$$&>\:Y$r=q$1$P$h$m$7$$$N$G$7$g$&$+!)(B

 $B$s!<!"!V>\:Y!W$O;d$,MQ$$$?8@MU$G$9$,NI$/$J$$$G$9$M!#<U$j$^(B
$B$9!#$4$a$s$J$5$$!#(B
 $BI=8=$H$7$F$O!"$h$j$-$D$$46$8$b$7$^$9$,!V$"$J$?$,$=$&;W$&:,(B
$B5r$,8+$($J$$!W$H$G$b=q$1$P!"$h$jNI$$I=8=$G$7$g$&$+!#(B

 $B$D$^$j!"(B192.168.36.1 $B$r0EL[%k!<%?$H$7$F07$C$F$bBg>fIWF0$/$h!"(B
$B$H$$$&$N$,ITL@$J$N$G!#(B
 $B$3$$$D<+?H$N7PO)I=$H$+(B traceroute $B$N7k2L$H$+$,M-$l$PH=CG$G(B
$B$-$^$9!#(B
 
> >  $B!V$7$F$$$J$/$F!W2?$G$9$C$F(B? $B0UL#ITL@$C$9$h!#(B
> $B!!!V;2>H$7$F$$$J$$$H$$$&$3$H$G$7$g$&$+!W$J$iI=8=$H$7$F@5$7$$$G$9$+!)(B

 $B$=$l$J$iJ9$-$?$$;v$,$O$C$-$jH=$j$^$9!#(B
 $BEz$O!V$o$?$7$NCN$k8B$j!"$A$c$s$H;2>H$7$F$$$k!W$G$9!#(B

> $B$^$9$H!"$"$k%[%9%H$+$i%;%0%a%s%H$,0c$&JL$N%[%9%H$K%"%/%;%9$9$k;~$O!"(B
> $B$^$:!"<+J,$N%5%V%M%C%H%^%9%/$r8+$F08@h$N%[%9%H$K9T$/$?$a$N7hDj$r$7$^$9$h$M!#(B
> $B$G!"08@h$K9T$/$?$a$N<!$N%N!<%I!J%[%C%W!)!K$K9T$C$F!"$=$N%N!<%I!J%[%9%H!K$O(B
> $B<+J,$N%5%V%M%C%H%^%9%/$r8+$F!"!"!"!"$H$$$&Iw$K%Q%1%C%H$,>/$7$:$D$K08@h$K(B
> $B6a$E$$$F!":G=*E*$K08@h$KE~C#$7$^$9!#(B

 $B$=$N$H$*$j$G$9!#@5$7$$M}2r$G$9!#(B
 $BF0:n$N5-=R$H$7$F$O!"$^$@[#Kf$JItJ,$d?($l$i$l$F$$$J$$F0:n$,(B
$BM-$j$^$9$,K\<AE*$K$OLdBj$K$J$j$^$;$s!#652J=q=q$$$F$k$o$1$8$c(B
$B$J$$$7$M!#(B

> $B9g$O!J30$N%[%9%H$+$i<+J,$N%[%9%H$KC/$+$,%"%/%;%9$7$?>l9g$O!K!"30$N%[%9%H(B
> $B$O<+J,$N%[%9%H!J$H$$$&$+!"30$N%[%9%H$K$H$C$F$N:G=*08@h%[%9%H!K$N%5%V%M%C(B
> $B%H%^%9%/$O;2>H$7$J$$$N$G$9$M!)@52r$C$9$+!)(B

 $B$b$A$m$s@52r$G$9$h!#(B
 $B$o$+$j$d$9$$$h$&$K%+%C%3$GJd$C$F2<$5$$$^$7$?$M!#$3$l$J$i9M(B
$B$($F$i$C$7$c$k;v$,$H$F$bNI$/H=$j$^$9!#$"$j$,$H$&$4$6$$$^$9!#(B

# $B$"$($F=q$1$P!V;2>H$9$kI,MW$,L5$$$+$i;2>H$7$J$$!W$N$@$7!V;2(B
#$B>H$7$?$/$F$b$=$N$?$a$N;EAH$_$,L5$$$+$i=PMh$J$$!W$N$G$9!#(B

> $B!t$3$l$O!"K?(BK$BBg3X$N%M%C%H%o!<%/4IM}<T$N?MC#$K$b8@$$$?$$(B
> $B!t2a5n!"KM$OCN$i$:$K$$$m$$$m0-$5$r$7$F$$$?$h$&$G$9!#(B

 $B$3$l$,H=$C$?$@$1$G$bBg<}3O$G$O$J$$$G$7$g$&$+!#(B
 $B$G!"$b$&0lJbF'$_9~$`$H!"$3$N5;=Q(B(IPv4)$B$K$O?'!9$HB-$j$J$$%b(B
$B%N$,$"$j$=$&$@!"$H$$$&N`?d$b$G$-$^$9$M(B?

$B!V$J$<$o$?$7$dB>$N%R%H$,0-$5=PMh$F$7$^$&DxEY$N;EAH$_$J$N$@$m(B
$B$&!W$C$F!#(B

 IPv6 $B$K$J$l$PA4$F2r7h$J$N$+!"$H$$$&$N$b9M$($F8+$k$H0l6=$+$H!#(B

# $B$J$s$+!"M%=($J<c?M$rE%>B$K0z$-$:$j$3$`0-<T$K$J$C$F$k$+$J(B

--- mino
