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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<H2><A NAME="s2">2.</A> <A HREF="PPP-HOWTO.html#toc2">IP $BHV9f(B</A></H2>

<P>$B%$%s%?!<%M%C%H$K@\B3$9$kA4$F$N%G%P%$%9$OFH<+$N(B IP $BHV9f$r;}$C$F$$$J$1$l(B
$B$P$J$j$^$;$s!#(BIP $BHV9f$r4IM}$9$k$?$a$NAH?%$O3F9q$4$H$K@_CV$5$l$F$$$^$9!#(B</P>

<P>LAN $B$r7PM3$7$F%$%s%?!<%M%C%H$K@\B3$9$k>l9g!"$"$i$+$8$a$=$N(B LAN $BMQ$K3d(B
$B$jEv$F$i$l$?(B IP $BHV9f$NCf$+$i!"(BLAN $B$K@\B3$7$F$$$kA4$F$N%3%s%T%e!<%?$H%G(B
$B%P%$%9$N(B IP $B%"%I%l%9$r@_Dj$7$J$1$l$P(B<B>$B$$$1$^$;$s(B</B>$B!#>!<j$KYTB$$7(B
$B$?(B IP $BHV9f$r;H$C$F(B LAN ($B%$%s%?!<%M%C%H$O8@$&$^$G$b$J$/(B)$B$K@\B3$7$F$O(B
<B>$B$$$1$^$;$s(B</B>$B!#:G0-$N>l9g!"C1$KF0$+$J$$$@$1$G$J$/!"$"$J$?$N!VEp(B
$B$s$@!W(B IP $BHV9f$,!"4{$K$=$NHV9f$r;H$C$F$$$k%3%s%T%e!<%?$NDL?.$H43>D$7$F(B
$BBg:.Mp$r$b$?$i$92DG=@-$9$i$"$j$^$9!#(B</P>

<P>$B$3$NJ8=q$NCf$G;H$&(B IP $BHV9f$O(B($B$$$/$D$+$NNc30$r=|$$$F(B)$B!"%$%s%?!<%M%C%H$K(B
$B@\B3$7$J$$%M%C%H%o!<%/MQ$K$"$i$+$8$aMQ0U$5$l$F$$$kHV9f$NCf$+$iA*$s$G$$(B
$B$k$3$H$KCm0U$7$F$/$@$5$$!#(B</P>

<P>$B%$%s%?!<%M%C%H$K@\B3$7$F$$$J$$(B LAN $BMQ$KMQ0U$5$l$?(B IP $BHV9f$O0J2<$NDL$j(B
$B$G$9!#(B</P>
<P>
<UL>
<LI> Class A $B$N%"%I%l%9(B 1 $B$D(B<BR>
10.0.0.0 - 10.255.255.255</LI>
<LI>Class B $B$N%"%I%l%9(B 16 <BR>
172.16.0.0 - 172.31.255.255</LI>
<LI>Class C $B$N%"%I%l%9(B 256 <BR>
192.168.0.0 - 192.168.255.255</LI>
</UL>
</P>

<P>$B$"$J$?$N9q$N(B IP $BHV9f$N4IM}AH?%$+$i(B IP $BHV9f$r(B<B>$B3dEv$F$F$b$i$C$F$$$J$$(B</B> ($BJD$8$?(B)LAN $B$K$O!">e$N(B IP $BHV9f$NCf$+$i0lO"$NHV9f$r3d$j$"$F$F;H$C(B
$B$F$/$@$5$$!#(B</P>


<P>$B$3$l$i$N(B IP $BHV9f$O%$%s%?!<%M%C%H$K@\B3$7$F$$$k%G%P%$%9$K$O(B<B>$B7h$7$F(B</B>$B;H$C$F$O$$$1$^$;$s!#$7$+$7$J$,$i!"%$%s%?!<%M%C%H$K@\B3$7$F$$$k%^(B
$B%7%s$N%m!<%+%k$J%$!<%5%M%C%H%$%s%?!<%U%'%$%9$K3dEv$F$k$3$H$O2DG=$G$9!#(B
$B$J$<$J$i!"(BIP $BHV9f$H$$$&$N$O<B:]$K$O%M%C%H%o!<%/%$%s%?!<%U%'%$%9$KIU$1(B
$B$k$b$N$G$"$j!"%3%s%T%e!<%?$KIU$1$k$b$N$G$O$J$$$+$i$G$9!#$G$9$+$i!"%$!<(B
$B%5%M%C%H%$%s%?!<%U%'%$%9$,(B ($BNc$($P(B)10.0.0.1 $B$G$"$C$F$b!"(BPPP $B$r;H$C$F%$(B
$B%s%?!<%M%C%H$K@\B3$9$k>l9g!"(BPPP $B%$%s%?!<%U%'%$%9$KJL$N(B($BM-8z$J(B) IP $BHV9f(B
$B$r%5!<%P$+$i3d$jEv$F$F$b$i$($P!"(BPPP $B7PM3$G%$%s%?!<%M%C%H$K@\B3$9$k$3$H(B
$B$O2DG=$G$9!#$3$N>l9g!"$"$J$?$N%^%7%s$+$i$O%$%s%?!<%M%C%H$K@\B3$G$-$^$9(B
$B$,!"(BLAN $B$K@\B3$7$?B>$N%3%s%T%e!<%?$+$i$O@\B3$G$-$^$;$s!#(B</P>

<P>$B$7$+$7$J$,$i!"(BLinux $B$H(B ipfwadm $B%=%U%H$N(B IP masquerade $B5!G=$r;H$($P!"(B
LAN $B$K@\B3$7$?B>$N%^%7%s$+$i$b%$%s%?!<%M%C%H$K@\B3$9$k$3$H$,2DG=$K$J$j(B
$B$^$9(B($B;H$($k%5!<%S%9$KB?>/$N@)8B$O$"$j$^$9$,(B)$B!#(B</P>

<P>masquerade $B5!G=$N>\:Y$K$D$$$F$O(B IP Masquerade mini-HOWTO(
<A HREF="http://sunsite.unc.edu/mdw/HOWTO/mini/IP-Masquerade">Linux IP Masquerade mini HOWTO</A> $B$r$4Mw$/$@$5$$!#(B</P>
<P>$B!V0lBf$N%^%7%s$r(B PPP $B$r;H$C$F%W%m%P%$%@7PM3$G%$%s%?!<%M%C%H$K@\B3$7$?(B
$B$$!W$H$$$&$[$H$s$I$N0lHL%f!<%6!<$K$H$C$F$O!"(BIP $BHV9f(B($B$h$j@53N$K$O%M%C%H(B
$B%o!<%/HV9f(B)$B$r8x<0$K3d$j$"$F$F$b$i$&I,MW$O$"$j$^$;$s!#(B</P>

<P>$B>.5,LO$N(B LAN $B$r%$%s%?!<%M%C%H$K@\B3$7$?$$>l9g!"B?$/$N%$%s%?!<%M%C%H@\(B
$BB3%5!<%S%9%W%m%P%$%@(B(ISP)$B$,!"$"$i$+$8$aMQ0U$7$F$"$k(B IP $BHV9f$NCf$+$i@l(B
$BMQ$N%5%V%M%C%H(B(IP $BHV9f$NFCDj$NAH(B)$B$r3d$jEv$F$k%5!<%S%9$rMQ0U$7$F$$$^$9!#(B</P>

<P>$B0lBf$N(B PC $B$r(B ISP $B7PM3$G%$%s%?!<%M%C%H$K@\B3$7$?$$%f!<%6$KBP$7$F!"$[$H(B
$B$s$I$N(B ISP $B$O(B<B>$BF0E*$J(B</B> IP $BHV9f$N3d$jEv$F$r9T$J$C$F$$$^$9!#$9$J$o(B
$B$A!"@\B3$7$?:]$K(B ISP $B$+$i!"$=$N@\B3$N:]$K$N$_M-8z$J(B IP $BHV9f$r$"$J$?$N(B 
PPP $B%$%s%?!<%U%'%$%9$K3d$jEv$F$k!"$H$$$&;EAH$_$G$9!#(B</P>


<P>$BF0E*$J(B IP $BHV9f$N3d$jEv$F5!G=$N>l9g!"3d$jEv$F$i$l$k(B IP $BHV9f$O@\B3$9$k$?(B
$B$S$K(B<B>$B0[$J$j(B</B>$B$^$9!#$3$N>l9g!"%5!<%P%?%$%W$N%"%W%j%1!<%7%g%s!"$9(B
$B$J$o$A(B sendmail $B$d(B ftpd$B!"(Bhttpd $B$J$I$O$&$^$/;H$($^$;$s!#F0E*$J(B IP $BHV9f(B
$B$N3d$jEv$F$K$h$k@)8B$K$D$$$F(B($B$H2DG=$JHO0O$G$=$N@)8B$r$/$0$j$L$1$kJ}K!(B
$B$K$D$$$F(B)$B$O8e=R$7$^$9!#(B</P>

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