Sophie: howto-html-ja-9.1-0.5mdk noarch

howto-html-ja-9.1-0.5mdk.noarch.rpm

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<H2><A NAME="s3">3. $B$b$&!":.Mp$7$FMh$?(B! $B%k!<%F%#%s%0$@$N!"%^%9%+%l!<%G%#%s%0$@$N!"%]!<%H%U%)%o!<%G%#%s%0$@$N!"<+F0%U%)%o!<%G%#%s%0(B(ipautofw)$B$@$N$C$F!D!#(B</A></H2>

<P>$B$3$N(B HOWTO $B$O!"%Q%1%C%H!&%U%#%k%?%j%s%0$K$D$$$F=R$Y$?$b$N$G$9!#(B
$B$=$l$O%Q%1%C%H$,DL2a$9$k$N$r5v$9$+$I$&$+$K$D$$$F7h$a$k$3$H$r0UL#$7$F$$$^$9!#(B
$B$7$+$7$J$,$i!"(BLinux$B$O$$$o$P%O%C%+!<C#$NM7$S>l$N$h$&$J$b$N$G$9$N$G!"$*$=$i$/$=$l0J>e$N5!G=$r<B8=$7$?$$$H;W$&$3$H$G$7$g$&!#(B
<P>
<P>1$B$D$NLdBj$O!"K\MhJL$J35G0$G$"$k$O$:$N%^%9%+%l!<%G%#%s%0$HF)2aE*$J%W%m%-%7$N@)8f$N$?$a$KF1$8%D!<%k(B (``ipchains'') $B$,;H$o$l$k$3$H$G$9(B($B8=:_$N(B Linux $B$G$N<BAu$G$O!"$3$l$i$,IT<+A3$J$+$?$A$G$$$C$7$g$K$J$C$F$*$j!"$"$?$+$b$=$l$i$,L)@\$K4XO"$,$"$k$H$$$&0u>]$rM?$($F$7$^$$$^$9(B)$B!#(B
<P>($BLuCm(B: $B%+!<%M%k(B 2.4.x $B7O$G$O!"$3$l$i$N5!G=$O$5$i$KE}9g6/2=$5$l$F$$$^$9!#(B
$B$=$l$i$N%+!<%M%k$r$*;H$$$NJ}$O!"(BLinux 2.4 NAT HOWTO(
<A HREF="http://netfilter.kernelnotes.org/unreliable-guides/NAT-HOWTO.html">http://netfilter.kernelnotes.org/unreliable-guides/NAT-HOWTO.html</A>)$B$b$4Mw2<$5$$!#(B
JF$B%W%m%8%'%/%H$K$h$kK.Lu(B(
<A HREF="http://www.linux.or.jp/JF/JFdocs/NAT-HOWTO.html">http://www.linux.or.jp/JF/JFdocs/NAT-HOWTO.html</A>)$B$b$"$j$^$9!#(B)
<P>
<P>$B%^%9%+%l!<%G%#%s%0$H%W%m%-%7$K$D$$$F$OJL!9$N(B HOWTO $BJ8=q$J$I$K$h$C$FLVMe$5$l!"<+F0%U%)%o!<%G%#%s%0$H%]!<%H!&%U%)%o!<%G%#%s%05!G=$OJL!9$N%D!<%k$G@)8f$5$l$^$9!#$7$+$7!"B?$/$N?M!9$+$i$=$l$i$K$D$$$F$NLd$$9g$o$;$r$&$1$F$$$^$9$N$G!"$3$3$G$O0lO"$N0lHLE*$H$*$b$o$l$k%7%J%j%*$$$/$D$+$H!"$I$N$h$&$K$9$l$P$h$$$+$H$$$&@_Dj$rDs<($7$^$9!#$J$*!"3F%;%C%H%"%C%W$N%;%-%e%j%F%#$K4X$9$kD9=j$K$D$$$F$O!"$3$3$GO@5D$7$^$;$s!#(B
<P>
<H2><A NAME="ss3.1">3.1 Rusty $B$N%^%9%+%l!<%G%#%s%0$K4X$9$k(B 3$B$D$N;X?K(B</A>
</H2>

<P>$B$3$l$O!"$"$J$?$N(B<B>$B30It(B</B>$B%$%s%?%U%'!<%9$,(B `ppp0' $B$G$"$k$H2>Dj$7$F$$$^$9!#(B
ifconfig $B%3%^%s%I$r$D$+$C$F!"$"$J$?$N4D6-$K9g$&$h$&$KFI$_BX$($F2<$5$$!#(B
<P>
<BLOCKQUOTE><CODE>
<PRE>
# ipchains -P forward DENY
# ipchains -A forward -i ppp0 -j MASQ
# echo 1 > /proc/sys/net/ipv4/ip_forward
</PRE>
</CODE></BLOCKQUOTE>
<P>
<H2><A NAME="ss3.2">3.2 $B<+H/E*$J@kEA(B:  WatchGuard $B$G5,@)$9$k(B</A>
</H2>

<P>$B;THN$N%U%!%$%"%&%)!<%k@lMQ5!$r9XF~$9$k$3$H$b$G$-$^$9!#(B
$BM%$l$?@lMQ5!$N$R$H$D$H$7$F!"(BWatchGuard $B<R$N(B FireBox $B$,$"$j$^$9!#(B
FireBox $B$,M%$l$F$$$k$H;W$&$N$O!"$o$?$7$,5$$KF~$C$F$$$k$+$i$G$"$j!"$=$l$,0BA4$@$+$i$G$"$j!"(BLinux $B%Y!<%9$GF0:n$7$F$$$k$+$i$G$9!#(B
$B$^$?!"$3$N2q<R$O!"(Bipchains $B$N%a%$%s%F%J%s%9$H!"(B(2.4 $B7O%+!<%M%kMQ$N(B)$B?7$7$$%U%!%$%"%&%)!<%k$N%3!<%I$N$?$a$K;q6bDs6!$7$F$/$l$?$+$i$G$9!#(B
$B$D$^$j!"$o$?$7$,3'$5$s$N$?$a$K:n6H$r$7$F$$$k4V!"(B WatchGuard $B<R$O!"$o$?$7$N@83h$r;Y$($F$/$l$?$o$1$G$9!#(B
$B$=$&$$$&$o$1$G!"H`$i$N@=IJ$K$D$$$F$b8f0l9M4j$$$^$9!#(B
<P>
<A HREF="http://www.watchguard.com">http://www.watchguard.com</A><P>($BLuCm(B: WatchGuard$B<R$NF|K\9qFb$N%j%;%i!<$b!"$3$N%Z!<%8$+$i<j7+$k$3$H$,$G$-$^$9!#(B)
<P>
<H2><A NAME="ss3.3">3.3 $B%U%!%$%"%&%)!<%kE*F0:n$K6&DL$J@_Dj(B</A>
</H2>

<P>$B$"$J$?$O!"(B littlecorp.com $B$H$$$&%I%a%$%sL>$G%7%9%F%`$rF0$+$7$F$$$^$9!#(B
$B$=$7$FFbIt%M%C%H%o!<%/$r;}$A!"%$%s%?!<%M%C%H$KBP$7$F!"(BIP$B%"%I%l%9$,(B 1.2.3.4 $B$G$"$k(B (firewall.littlecorp.com) $B$H$$$&%3%s%T%e!<%?$K(B1$B2s@~$N%@%$%d%k%"%C%W(B(PPP)$B%3%M%/%7%g%s$r;}$C$F$$$^$9!#(B
$B$"$J$?$O%$!<%5%M%C%H$K$h$k%m!<%+%k%M%C%H%o!<%/$r9=C[$7$F$*$j!"$"$J$?$N8D?MMQ%3%s%T%e!<%?$O(B "myhost" $B$H8F$P$l$F$$$^$9!#(B
<P>
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$B$=$l$i$OHyL/$K0[$J$j$^$9$N$G!"Cm0U?<$/FI$_?J$a$F2<$5$$!#(B
<P>
<H3>$B%m!<%+%k%M%C%H%o!<%/(B: $BEAE}E*$J%W%m%-%7(B</H3>

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$B%m!<%+%k%M%C%H%o!<%/$N(B IP $B%"%I%l%9$O!"(B RFC1918 $B$K$F%W%i%$%Y!<%H$J%$%s%?!<%M%C%H4D6-$N$?$a$KMQ0U$5$l$F$$$k%"%I%l%9(B($B$9$J$o$A(B 10.*.*.*, 172.16.*.*-172.31.*.* $B$^$?$O(B 192.168.*.*)$B$r3d$jEv$F$J$1$l$P$J$j$^$;$s!#(B
<P>
<P>$B%$%s%?!<%M%C%H$K@\B3$9$kM#0l$NJ}K!$O%U%!%$%"%&%)!<%k$K@\B3$9$k$3$H$G!"$3$N%3%s%T%e!<%?$,N>J}$N%M%C%H%o!<%/(B($BLuCm(B: $B%$%s%?!<%M%C%H$H%m!<%+%k%M%C%H%o!<%/(B)$B$KD>@\$D$J$,$C$F$$$^$9!#(B
$B$3$N%U%!%$%"%&%)!<%k$N>e$G%W%m%-%7$H8F$P$l$k%=%U%H$rF0$+$9$3$H$K$J$j$^$9(B($B$3$l$O(B FTP $B!"%&%'%V!&%"%/%;%9!"(B telnet $B!"(B RealAudio $B!"(B Usenet News $B$dB>$N%5!<%S%9$K$D$$$F!"(B"$BBeM}(B"$B$H$7$FF/$-$^$9(B)$B!#(B
$B>\:Y$K$D$$$F$O(B Firewall HOWTO $B$r8+$^$7$g$&!#(B
<P>($BLuCm(B:  "Firewall HOWTO" $B$N86J8$O(B 
<A HREF="http://www.linuxdoc.org/HOWTO/Firewall-HOWTO.html">http://www.linuxdoc.org/HOWTO/Firewall-HOWTO.html</A> $B$K$"$j$^$9!#(B
JF$B%W%m%8%'%/%H$K$h$kK.Lu$O$^$@:n6HCf$G$9!#(B)
<P>
<P>$B$"$J$?$,%$%s%?!<%M%C%H$X$N%"%/%;%9$GK>$`%5!<%S%9$K$D$$$F$O!"I,$:%U%!%$%"%&%)!<%k>e$N%W%m%-%7$G%5%]!<%H$5$l$?%5!<%S%9$G$J$1$l$P$J$j$^$;$s(B($B$7$+$7!"8e=R$N(B 
<A HREF="#limited-services">$B@)8B$5$l$?FbIt%5!<%S%9(B</A> $B$r;2>H$7$F2<$5$$(B)$B!#(B
<P>
<P>$BNc(B: $B%W%i%$%Y!<%H%M%C%H%o!<%/$+$i%$%s%?!<%M%C%H$X$N%&%'%V!&%"%/%;%9$r5v$9(B
<OL>
<LI> $B%W%i%$%Y!<%H%M%C%H%o!<%/$O!"(B192.168.1.*$B$r3d$jEv$F$i$l$?J#?t$NHVCO$+$i$J$j!"(BIP$B%"%I%l%9$,(B192.168.1.100$B$O(B"myhost"$B$K!"%U%!%$%"%&%)!<%k$N%$!<%5%M%C%H!&%$%s%?%U%'!<%9$K$O(B192.168.1.1$B$,3d$jEv$F$i$l$F$$$^$9!#(B
</LI>
<LI> $B%&%'%V!&%W%m%-%7(B($BNc$($P(B"squid")$B$O!"%U%!%$%"%&%)!<%k$N>e$K%$%s%9%H!<%k$5$l$F$*$j%]!<%H(B8080$B$GF0$$$F$$$^$9!#(B
</LI>
<LI> $B%W%i%$%Y!<%H%M%C%H%o!<%/$N(BNetscape$B$O!"%W%m%-%7$H$7$F%U%!%$%"%&%)!<%k$N%]!<%H(B8080$B$r;H$&$h$&$K@_Dj$5$l$F$$$^$9!#(B
</LI>
<LI> DNS$B$O!"%W%i%$%Y!<%H%M%C%H%o!<%/$NCf$G@_Dj$5$l$kI,MW$O$"$j$^$;$s!#(B
</LI>
<LI> DNS$B$O!"%U%!%$%"%&%)!<%k$N>e$G@_Dj$5$l$kI,MW$,$"$j$^$9!#(B
</LI>
<LI> $B%G%U%)%k%H!&%k!<%H(B($BJLL>!"%2!<%H%&%'%$(B)$B$O!"%W%i%$%Y!<%H%M%C%H%o!<%/$NCf$G@_Dj$5$l$kI,MW$O$"$j$^$;$s!#(B</LI>
</OL>
<P>
<P>myhost $B>e$N(B Netscape $B$+$i!"(B http://slashdot.org $B$N%Z!<%8$r8+$k(B
<OL>
<LI> 
Netscape $B$O%U%!%$%"%&%)!<%k$N%]!<%H(B8080$B$K@\B3$7!"(B myhost $B>e$N%]!<%H(B1050$B$r;H$C$F(B "http://slashdot.org" $B$N%&%'%V!&%Z!<%8$r8+$k$h$&$K%U%!%$%"%&%)!<%k$K0MMj$7$^$9!#(B
</LI>
<LI> $B%W%m%-%7$O(B "slashdot.org" $B$H$$$&L>A0$rD4$Y$F!"(B "207.218.152.131" $B$H$$$&(BIP$B%"%I%l%9$rF@$^$9!#(B
$B$=$l$+$i%U%!%$%"%&%)!<%k$N30It%$%s%?%U%'!<%9(B($BLuCm(B: ppp0 $B$J$I(B)$B$N>e$G%]!<%H(B1025$B$r;H$C$F!"$=$N(B IP $B%"%I%l%9$KBP$7$F%&%'%V!&%5!<%P(B($B%]!<%H(B80)$B$G%&%'%V!&%Z!<%8$rMW5a$7$^$9!#(B
</LI>
<LI> $BAj<j$N%&%'%V!&%5!<%P$KBP$9$k@\B3$+$i%&%'%V!&%Z!<%8$r<u$1<h$k$H!"$=$l$O(BNetscape$B$X$N@\B3$X%G!<%?$,%3%T!<$5$l$^$9!#(B
</LI>
<LI> Netscape$B$O!"%Z!<%8$rI=<($7$^$9!#(B</LI>
</OL>
<P>$B$D$^$j!"(B slashdot.org $B$NB&$+$i8+$k$H!"(B 1.2.3.4 ($B%U%!%$%"%&%)!<%k$N(B PPP $B%$%s%?%U%'!<%9(B)$B%]!<%H(B1025$B$+$i!"(B 207.218.152.131 (slashdot.org)$B%]!<%H(B80$B$^$G@\B3$5$l$k$3$H$K$J$j$^$9!#(B
myhost $B$NB&$+$i8+$k$H!"(B 192.168.1.1 ($B%U%!%$%"%&%)!<%k$N%$!<%5%M%C%H!&%$%s%?%U%'!<%9(B)$B$N%]!<%H(B8080$B$H(B 192.168.1.100(myhost)$B$N%]!<%H(B1050$B$,@\B3$5$l$k$3$H$K$J$j$^$9!#(B
<P>
<H3>$B%W%i%$%Y!<%H%M%C%H%o!<%/(B: $BF)2aE*$J%W%m%-%7(B</H3>

<P>$B$3$N%7%J%j%*$G$O!"%m!<%+%k%M%C%H%o!<%/$+$i$N%Q%1%C%H$O!"%$%s%?!<%M%C%H$r9T$-Mh$9$k$3$H$O$"$j$^$;$s!#(B
$B%m!<%+%k%M%C%H%o!<%/$N(B IP $B%"%I%l%9$O!"(B RFC1918 $B$K$F%W%i%$%Y!<%H$J%$%s%?!<%M%C%H4D6-$N$?$a$KMQ0U$5$l$F$$$k%"%I%l%9(B($B$9$J$o$A(B 10.*.*.* $B!"(B 172.16.*.*-172.31.*.* $B$^$?$O(B 192.168.*.*)$B$r3d$jEv$F$J$1$l$P$J$j$^$;$s!#(B
<P>
<P>$B%$%s%?!<%M%C%H$K@\B3$9$kM#0l$NJ}K!$O%U%!%$%"%&%)!<%k$K@\B3$9$k$3$H$G!"$3$N%3%s%T%e!<%?$,N>J}$N%M%C%H%o!<%/(B($BLuCm(B: $B%$%s%?!<%M%C%H$H%m!<%+%k%M%C%H%o!<%/(B)$B$KD>@\$D$J$,$C$F$$$^$9!#(B
$B$3$N%U%!%$%"%&%)!<%k$N>e$G(B"$BF)2aE*$J%W%m%-%7(B"$B$H8F$P$l$k%=%U%H$rF0$+$9$3$H$K$J$j$^$9$,!"$3$3$G$O%+!<%M%k$,=PNO%Q%1%C%H$r30It$KAw$kBe$j$K!"F)2aE*$J%W%m%-%7$KAw$j=P$9$3$H$K$J$j$^$9(B
($B$9$J$o$A!"56$N%k!<%F%#%s%0$r9T$&$h$&$K$J$j$^$9(B)$B!#(B
<P>
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<P>
<P>$B$"$J$?$,%$%s%?!<%M%C%H$X$N%"%/%;%9$GK>$`%5!<%S%9$K$D$$$F$O!"I,$:%U%!%$%"%&%)!<%k>e$N%W%m%-%7$G%5%]!<%H$5$l$?%5!<%S%9$G$J$1$l$P$J$j$^$;$s(B($B$7$+$7!"8e=R$N(B 
<A HREF="#limited-services">$B@)8B$5$l$?FbIt%5!<%S%9(B</A> $B$r;2>H$7$F2<$5$$(B)$B!#(B
<P>
<P>$BNc(B: $B%W%i%$%Y!<%H%M%C%H%o!<%/$+$i%$%s%?!<%M%C%H$X$N%&%'%V!&%"%/%;%9$r5v$9(B
<OL>
<LI> $B%W%i%$%Y!<%H%M%C%H%o!<%/$O!"(B 192.168.1.* $B$r3d$jEv$F$i$l$?J#?t$NHVCO$+$i$J$j!"(B IP $B%"%I%l%9$,(B 192.168.1.100 $B$O(B myhost $B$K!"%U%!%$%"%&%)!<%k$N%$!<%5%M%C%H!&%$%s%?%U%'!<%9$K$O(B 192.168.1.1 $B$,3d$jEv$F$i$l$F$$$^$9!#(B
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</LI>
<LI> $B%+!<%M%k$O(B ipchains $B$r;H$C$F%]!<%H(B80$B$N@\B3$r%W%m%-%7$K8~$1$J$*$9$h$&$K;X<($5$l$F$$$^$9!#(B
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<LI> $B%W%i%$%Y!<%H%M%C%H%o!<%/$N(B Netscape $B$O!"$"$?$+$bD>@\@\B3$9$k$h$&$K@_Dj$7$^$9!#(B
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$B$5$b$J$$$H!"L>A02r7h$N$?$a$N%Q%1%C%H$,%/%i%$%"%s%H$+$i%$%s%?!<%M%C%H$K=P$F$7$^$$$^$9!#(B)
</LI>
<LI> $B%U%!%$%"%&%)!<%k$K%Q%1%C%H$rAw$k$?$a$K%W%i%$%Y!<%H%M%C%H%o!<%/Fb$K%G%U%)%k%H!&%k!<%H(B($BJLL>!"%2!<%H%&%'%$(B)$B$r@_Dj$9$kI,MW$,$"$j$^$9!#(B</LI>
</OL>
<P>
<P>myhost $B$N(B Netscape $B$+$i!"(Bhttp://slashdot.org $B$r8+$k!#(B
<OL>
<LI> Netscape$B$O!"(B "slashdot.org" $B$H$$$&L>A0$rD4$Y$F!"(B 207.218.152.131 $B$H$$$&(B IP $B%"%I%l%9$rF@$^$9!#$=$7$F!"$=$N(B IP $B%"%I%l%9$KBP$7$F%]!<%H(B1050$B$K$F@\B3$7!"%&%'%V%5!<%P(B($B%]!<%H(B80)$B$X%Z!<%8%G!<%?$rMW5a$7$^$9!#(B
</LI>
<LI> slashdot.org ($B%]!<%H(B80)$B$X$N(B myhost ($B%]!<%H(B1050)$B$+$i$N%Q%1%C%H$O%U%!%$%"%&%)!<%k$r7PM3$7$^$9$,!"$=$l$i$O%]!<%H(B8080$B$N>e$GBT$C$F$$$kF)2aE*$J%W%m%-%7$K8~$1D>$5$l$^$9!#(B
$BF)2aE*$J%W%m%-%7$O!"(B 207.218.152.131 $B$N%]!<%H(B80($B$b$H$b$H%/%i%$%"%s%H$+$i$N%Q%1%C%H$K;XDj$5$l$F$$$?08@h(B)$B$KBP$7$F!"(B($B%m!<%+%k$J%]!<%H(B1025$B$r;H$C$F(B)$B@\B3$r9T$$$^$9!#(B
</LI>
<LI> $B%W%m%-%7$O$=$N@\B3$K$h$C$F%&%'%V!&%5!<%P$+$i%Z!<%8$r<u$1<h$j!"(B Netscape $B$KBP$9$k@\B3$K$=$N%G!<%?$r%3%T!<$7$^$9!#(B
</LI>
<LI> Netscape$B$O!"%Z!<%8$rI=<($7$^$9!#(B</LI>
</OL>
<P>$B$D$^$j!"(B slashdot.org $B$+$i8+$k$H!"@\B3$O$O(B 1.2.3.4 ($B%U%!%$%"%&%)!<%k$N(B PPP $B%$%s%?%U%'!<%9(B)$B%]!<%H(B1025$B$+$i!"(B 207.218.152.131 (slashdot.org)$B$N%]!<%H(B80$B$^$G$N4V$G9T$o$l$F$$$^$9!#(B
myhost $B$+$i8+$k$H!"(B 207.218.152.131 (slashdot.org)$B$N%]!<%H(B80$B$KBP$7$F!"(B 192.168.1.100 (myhost)$B%]!<%H(B1050$B$^$G$N4V$G9T$o$l$F$$$^$9!#(B
$B$,!"$=$l$O<B:]$K$OF)2aE*$J%W%m%-%7$H$d$j<h$j$7$F$$$k$3$H$K$J$j$^$9!#(B
<P>
<H3>$B%W%i%$%Y!<%H%M%C%H%o!<%/(B: $B%^%9%+%l!<%G%#%s%0(B</H3>

<P>$B$3$N%7%J%j%*$G$O!"%m!<%+%k%M%C%H%o!<%/$+$i$N%Q%1%C%H$O!"FCJL$J07$$$,$J$1$l$P%$%s%?!<%M%C%H$r9T$-Mh$9$k$3$H$O$"$j$^$;$s!#(B
$B%m!<%+%k%M%C%H%o!<%/$N(B IP $B%"%I%l%9$O!"(B RFC1918 $B$K$F%W%i%$%Y!<%H$J%$%s%?!<%M%C%H4D6-$N$?$a$KMQ0U$5$l$F$$$k%"%I%l%9(B($B$9$J$o$A(B 10.*.*.* $B!"(B 172.16.*.*-172.31.*.* $B$^$?$O(B 192.168.*.*)$B$r3d$jEv$F$J$1$l$P$J$j$^$;$s!#(B
<P>
<P>$B%W%m%-%7$r;H$&Be$o$j$K!"(B "$B%^%9%+%l!<%G%#%s%0(B" $B$H8F$P$l$kFCJL$J%+!<%M%k5!G=$r;H$$$^$9!#(B
$B%^%9%+%l!<%G%#%s%0$O!"%U%!%$%"%&%)!<%k$r7PM3$7$?$+$N$h$&$K%Q%1%C%H$r=q$-49$($k$N$G!"$3$l$i$N%Q%1%C%H$O>o$K%U%!%$%"%&%)!<%k<+?H$+$i$-$?$h$&$K8+$($^$9!#(B
$B$=$l$+$i!"1~Ez$rK\Mh$NMW5a85$XAw$k$h$&$K=q$-49$($^$9!#(B
<P>
<P>$B%^%9%+%l!<%G%#%s%0$O$$$/$D$+$N(B "$B%H%j%C%-!<$J(B" $B%W%m%H%3%k$r07$&$?$a$N8DJL$N%b%8%e!<%k$r;}$C$F$$$^$9!#(B
$BNc$($P!"(BFTP, RealAudio, Quake $B$J$I$G$9!#(B
$BK\Ev$K<h$j07$$$,Fq$7$$%W%m%H%3%k$N$?$a$K$O!"(B "$B<+F0%U%)%o!<%G%#%s%0(B" $B5!G=$K$F!"4XO"$7$?%]!<%H$NE>Aw$r<+F0E*$K@_Dj$9$k$3$H$K$h$j!"$=$l$i$N0lIt$r<h$j07$&$3$H$,$G$-$^$9!#(B
$B>\:Y$K$D$$$F$O(B ``ipportfw'' (2.0$B7O%+!<%M%k(B)$B$^$?$O(B ``ipmasqadm'' (2.1$B7O%+!<%M%k(B)$B$rD4$Y$F$_$F2<$5$$!#(B
<P>
<P>$B$"$J$?$,%$%s%?!<%M%C%H$X$N%"%/%;%9$GK>$`%5!<%S%9$K$D$$$F$O!"I,$:%U%!%$%"%&%)!<%k>e$N%W%m%-%7$G%5%]!<%H$5$l$?%5!<%S%9$G$J$1$l$P$J$j$^$;$s(B($B$7$+$7!"8e=R$N(B 
<A HREF="#limited-services">$B@)8B$5$l$?FbIt%5!<%S%9(B</A> $B$r;2>H$7$F2<$5$$(B)$B!#(B
<P>
<P>$BNc(B: $B%W%i%$%Y!<%H%M%C%H%o!<%/$+$i%$%s%?!<%M%C%H$X$N%&%'%V!&%"%/%;%9$r5v$9(B
<OL>
<LI> $B%W%i%$%Y!<%H%M%C%H%o!<%/$O!"(B 192.168.1.* $B>e$NJ#?t$NHVCO$+$i$J$j!"(B myhost $B$K$O(B 192.168.1.100 $B$,3d$jEv$F$i$l!"%U%!%$%"%&%)!<%k$N%$!<%5%M%C%H%$%s%?!<%U%'!<%9$K$O(B 192.168.1.1 $B$,3d$jEv$F$i$l$F$$$^$9!#(B
</LI>
<LI> $B%U%!%$%"%&%)!<%k$O!"%W%i%$%Y!<%H%M%C%H%o!<%/$+$i%$%s%?!<%M%C%H$N>e$N%[%9%H$N%]!<%H(B80$B$X$N$9$Y$F$N%Q%1%C%H$r%^%9%+%l!<%I$9$k$h$&@_Dj$5$l$F$$$^$9!#(B
</LI>
<LI> Netscape $B$O!"D>@\@\B3$9$k$h$&$K@_Dj$5$l$F$$$^$9!#(B
</LI>
<LI> DNS $B$O!"%W%i%$%Y!<%H%M%C%H%o!<%/$N>e$G@5$7$/@_Dj$5$l$F$$$J$1$l$P$J$j$^$;$s!#(B
</LI>
<LI> $B%U%!%$%"%&%)!<%k$O!"%W%i%$%Y!<%H%M%C%H%o!<%/$N$?$a$N%G%U%)%k%H!&%k!<%H(B($BJLL>!"%2!<%H%&%'%$(B)$B$G$J$1$l$P$J$j$^$;$s!#(B</LI>
</OL>
<P>myhost $B$N(B Netscape $B$+$i!"(B http://slashdot.org $B$rFI$`!#(B
<OL>
<LI> Netscape $B$O!"(B "slashdot.org" $B$H$$$&L>A0$rD4$Y$F!"(B 207.218.152.131 $B$H$$$&(B IP $B%"%I%l%9$rF@$^$9!#(B
$B$=$l$+$i%m!<%+%k$J%]!<%H(B1050$B$r;H$C$F!"$=$N(B IP $B%"%I%l%9$N%&%'%V!&%5!<%P(B($B%]!<%H(B80)$B$KBP$7$F@\B3$r9T$$!"%&%'%V!&%Z!<%8$rMW5a$7$^$9!#(B
</LI>
<LI> slashdot.org ($B%]!<%H(B80)$B$X$N(B myhost ($B%]!<%H(B1050)$B$+$i$N%Q%1%C%H$O%U%!%$%"%&%)!<%k$KEO$5$l!"$=$3$G%U%!%$%"%&%)!<%k(B($B%]!<%H(B65000)$B$N(B PPP $B%$%s%?%U%'!<%9$+$iMh$?$+$N$h$&$K=q$-D>$5$l$^$9!#(B
slashdot.org $B$+$i$N1~Ez%Q%1%C%H$rJV$9$3$H$,2DG=$H$J$k$h$&$K!"%U%!%$%"%&%)!<%k$OM-8z$J%$%s%?!<%M%C%H%"%I%l%9(B(1.2.3.4)$B$r;}$C$F$$$^$9!#(B
</LI>
<LI> firewall.littlecorp.com ($B%]!<%H(B65000)$B$KBP$7$F(B slashdot.org ($B%]!<%H(B80)$B$+$i$N%Q%1%C%H$,JV$5$l!"$=$l$i$r(B myhost ($B%]!<%H(B1050)$B$XAw$k$?$a$K=q$-D>$5$l$^$9!#(B
$B%^%9%+%l!<%G%#%s%0$r<B8=$9$k$?$a$N(B "$BKbK!(B" $B$N@5BN$H$$$&$N$O!"$D$^$j!"1~Ez$,Mh$?$H$-$K!"$=$l$r@5$7$/La$;$k$h$&$K!"=PNO%Q%1%C%H$r=q$-49$($k$H$-$K3P$($F$*$/$H$$$&$3$H$G$9!#(B
</LI>
<LI> Netscape$B$O!"%Z!<%8$rI=<($7$^$9!#(B</LI>
</OL>
<P>slashdot.org $B$NB&$+$i8+$k$H!"@\B3$O(B 1.2.3.4 ($B%U%!%$%"%&%)!<%k$N(B PPP $B%$%s%?%U%'!<%9(B)$B%]!<%H(B65000$B$+$i!"(B 207.218.152.131 (slashdot.org)$B%]!<%H(B80$B$^$G9T$o$l$F$$$^$9!#(B
myhost $B$NB&$+$i8+$k$H!"@\B3$O(B 207.218.152.131 (slashdot.org)$B%]!<%H(B80$B$KBP$7$F!"(B 192.168.1.100 (myhost)$B%]!<%H(B1050$B$+$i9T$o$l$F$$$^$9!#(B
<P>
<P>
<H3>$B%Q%V%j%C%/%M%C%H%o!<%/(B</H3>

<P>$B$3$N%7%J%j%*$G$O!"$"$J$?$N8D?M$N%M%C%H%o!<%/$O%$%s%?!<%M%C%H$N0lItJ,$G$9(B:
$B%Q%1%C%H$OJQ99$5$l$k$3$H$J$/N>J}$N%M%C%H%o!<%/$rN.$l$k$3$H$,$G$-$^$9!#(B
$BFbIt%M%C%H%o!<%/$N(B IP $B%"%I%l%9$O!"(B IP $B%"%I%l%9$N%V%m%C%/$r?=@A$9$k$3$H$K$h$C$F3d$jEv$F$i$l$?$b$N$N$O$:$G$9$N$G!"B>$N%M%C%H%o!<%/$O!"$I$&$d$C$F$"$J$?$N85$X%Q%1%C%H$rFO$1$i$l$k$+$rCN$C$F$$$k$G$7$g$&!#(B
$B$3$l$O7QB3E*$K@\B3$5$l$k$3$H$r0UL#$7$F$$$^$9!#(B
<P>($BLuCm(B: $BNc$($P!"(B INTERNIC $B$d(B JPNIC $B$J$I$KBP$9$k@5$7$$<jB3$-$K$h$C$FF@$i$l$?7QB3E*$K;HMQ$G$-$k(B IP $B%"%I%l%9$r$"$J$?$,=jM-$7$F$$$J$1$l$P$J$i$J$$$H$$$&$3$H$G$9!#(B)
<P>
<P>$B$3$N>lLL$G%Q%1%C%H!&%U%#%k%?%j%s%0$O!"$I$N$h$&$J%Q%1%C%H$,$"$J$?$N%M%C%H%o!<%/$H$=$l0J30$N%$%s%?!<%M%C%H$H$N4V$G$d$j<h$j$5$l$k$+$r@)8B$9$k$?$a$J$I$K;H$o$l$^$9!#(B
$BNc$($P!"%$%s%?!<%M%C%H$NB>$N>l=j$H$N%Q%1%C%H$N$d$j<h$j$r$"$J$?$N%&%'%V%5!<%P$KBP$7$F$N$_$K8BDj$5$;$k$3$H$,$G$-$^$9!#(B
<P>
<P>$B%W%i%$%Y!<%H%M%C%H%o!<%/$+$i%$%s%?!<%M%C%H$X$N%&%'%V!&%"%/%;%9$r5v$9(B
<OL>
<LI> $B$"$J$?$NFbIt%M%C%H%o!<%/$O!"$"$J$?$,EPO?$7$?(B IP $B%"%I%l%9!&%V%m%C%/(B(1.2.3.* $B$H$7$^$9(B)$B$K1~$8$?%"%I%l%9$,3d$jEv$F$i$l$F$$$^$9!#(B
</LI>
<LI> $B%U%!%$%"%&%)!<%k$O!"A4$F$N%H%i%U%#%C%/$r5v$9$h$&@_Dj$5$l$F$$$^$9!#(B

($BLuCm(B: $B$3$3$G<($5$l$?%7%J%j%*$O@bL@$N$?$a$NJX59E*$J%1!<%9$G$9!#(B
$B<B:]$N%1!<%9$G$O!"<!$N@a(B("$BFbIt%5!<%S%9$N8BDj(B")$B$G<($5$l$?$h$&$K!"%5!<%S%9$r8BDj$9$k$J$I!"$"$J$?$N%M%C%H%o!<%/$r<i$k$?$a$K!"=PF~$j$9$k%Q%1%C%H$K$D$$$FE,@Z$J5v2D!?5qH]$N$?$a$N>r7o$r@_Dj$7$F$*$+$J$1$l$P$J$j$^$;$s!#(B)
</LI>
<LI> Netscape$B$O!"%$%s%?!<%M%C%H$KD>@\@\B3$9$k$h$&$K@_Dj$5$l$F$$$^$9!#(B
</LI>
<LI> DNS$B$O!"$"$J$?$N%M%C%H%o!<%/$N>e$G@5$7$/@_Dj$5$l$F$$$J$1$l$P$J$j$^$;$s!#(B
</LI>
<LI> $B%U%!%$%"%&%)!<%k$O!"%W%i%$%Y!<%H%M%C%H%o!<%/$N$?$a$N%G%U%)%k%H!&%k!<%H(B($B%2!<%H%&%'%$(B)$B$G$J$1$l$P$J$j$^$;$s!#(B</LI>
</OL>
<P>myhost $B$N(B Netscape $B$+$i!"(Bhttp://slashdot.org $B$r8+$k!#(B
<OL>
<LI> Netscape$B$O!"(B "slashdot.org" $B$H$$$&L>A0$rD4$Y$F!"(B 207.218.152.131 $B$H$$$&(B IP $B%"%I%l%9$rF@$^$9!#(B
$B$=$l$+$i%m!<%+%k$J%]!<%H(B1050$B$r;H$C$F!"$=$N(B IP $B%"%I%l%9$N%&%'%V!&%5!<%P(B($B%]!<%H(B80)$B$KBP$7$F@\B3$r9T$$!"%&%'%V!&%Z!<%8$rMW5a$7$^$9!#(B
</LI>
<LI> $B%Q%1%C%H$O$"$J$?$N%M%C%H%o!<%/$H(B slashdot.org $B$N4V$NB>$N$$$/$D$+$N%k!<%?!<$rDL$jH4$1$k$N$HF1$8$h$&$K!"$"$J$?$N%U%!%$%"%&%)!<%k$rDL$jH4$1$F$d$j<h$j$5$l$^$9!#(B
</LI>
<LI> Netscape$B$O!"%Z!<%8$rI=<($7$^$9!#(B</LI>
</OL>
<P>$B$D$^$j!"$3$N>l9g$O(B 207.218.152.131 (slashdot.org)$B%]!<%H(B80$B$H!"(B 1.2.3.100 (myhost)$B%]!<%H(B1050$B$N4V$N$?$@$R$H$D$@$1$N@\B3$,B8:_$7$^$9!#(B
<P>
<H3><A NAME="limited-services"></A> $B@)8B$5$l$?FbIt%5!<%S%9(B</H3>

<P>$B30$N%$%s%?!<%M%C%H$+$i$"$J$?$NFbIt%5!<%S%9$KBP$7$F!"%U%!%$%"%&%)!<%k>e$G%5!<%S%9$r<B9T$9$k0J30$NJ}K!$r$H$k$3$H$N$G$-$k%H%j%C%/$,>/$7$P$+$j$"$j$^$9!#(B
$B$=$l$i$NJ}K!$G$O%W%m%-%7$d%^%9%+%l!<%G%#%s%0$r30It$N%3%M%/%7%g%s$N$?$a$K;HMQ$9$k$H$$$&%"%W%m!<%A$r$H$j$^$9!#(B
<P>
<P>$B:G$bC1=c$J%"%W%m!<%A$O(B "$B%j%@%$%l%/%?!<(B" ($B$=$l$OM?$($i$l$?%]!<%H$N>e$G@\B3$rBT$D$H$$$&(B"$BIO<e$J(B"$B%W%m%-%7$G$9(B)$B$rF0:n$5$;$k$3$H$G$9!#(B
$B$=$l$i$O$"$i$+$8$a7h$a$i$l$?FbIt%[%9%H$H%]!<%H$KBP$7$F@\B3$r9T$$!"%G!<%?$rFs$D$N@\B3$N4V$G%3%T!<$7$^$9!#(B
"redir" $B%W%m%0%i%`$r;H$C$?Nc$r<($9$H!"30$N%$%s%?!<%M%C%HB&$+$i8+$k$H!"@\B3$O$"$J$?$N%U%!%$%"%&%)!<%k$KBP$7$F9T$o$l$^$9!#(B
$BCf$N%5!<%P$NB&$+$i8+$k$H!"%U%!%$%"%&%)!<%k$H$=$N%5!<%P$KBP$7$F@\B3$,9T$o$l$k$h$&$K$J$j$^$9!#(B
<P>
<P>$B$b$&0l$D$N%"%W%m!<%A(B($B$3$l$K$O(B ipportfw $B$N$?$a$K%Q%C%A$rEv$F$i$l$?(B 2.0 $B7O%+!<%M%k$+!"$"$k$$$O(B 2.1 $B7O0J9_$N%+!<%M%k$,I,MW$G$9(B)$B$O%+!<%M%k$G$N%]!<%H!&%U%)%o!<%G%#%s%0$r;H$&$3$H$G$9!#(B
$B$3$l$O!"(B "redir" $B$HF1$8F0:n$rJL$JJ}K!$G9T$$$^$9!#(B
$B$D$^$j!"%+!<%M%k$OEO$5$l$?%Q%1%C%H$KBP$7$F!"$=$NL\E*%"%I%l%9$H%]!<%H$rFbIt$N%[%9%H$H%]!<%H$KBP$7$F8~$1$i$l$?$h$&$K=q$-49$($^$9!#(B
$B30$N%$%s%?!<%M%C%HB&$+$i8+$k$H!"$"$J$?$N%U%!%$%"%&%)!<%k$KBP$7$F@\B3$5$l$?$h$&$K8+$($^$9!#(B
$B$^$?!"$"$J$?$NFbIt$N%5!<%PB&$+$i8+$k$H!"%$%s%?!<%M%C%H!&%[%9%H$+$i%5!<%P$^$GD>@\@\B3$5$l$F$$$k$h$&$K8+$($^$9!#(B
<P>
<H2><A NAME="ss3.4">3.4 $B%^%9%+%l!<%G%#%s%0$KBP$9$k$=$NB>$N>pJs(B</A>
</H2>

<P>David Ranch $B$O%^%9%+%l!<%G%#%s%0$K4X$9$kM%$l$??7$7$$(B HOWTO $B$r=q$-$^$7$?!#(B
$B$3$N(B HOWTO $B$H$OB?$/$N=EJ#ItJ,$r;}$A$^$9$,!"<!$N%Z!<%8$+$i8+$D$1$k$3$H$,$G$-$^$9!#(B
<P>
<A HREF="http://www.linuxdoc.org/HOWTO/IP-Masquerade-HOWTO.html">http://www.linuxdoc.org/HOWTO/IP-Masquerade-HOWTO.html</A><P>
<P>$B%^%9%+%l!<%G%#%s%0$N8x<0%Z!<%8$O<!$N$H$*$j$G$9!#(B
<P>
<A HREF="http://ipmasq.cjb.net">http://ipmasq.cjb.net</A><P>
<P>
<HR>
<A HREF="IPCHAINS-HOWTO-4.html">$B<!$N%Z!<%8(B</A>
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