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Date: Fri, 10 Sep 1999 11:07:32 +0900 (JST)
From: Masashi WADA <mwada@hitachi-ul.co.jp>
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Subject: [FreeBSD-users-jp 45467] Re: [Q]  Does App.gateway type NAT exist ?
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$BOBED$G$9!#(B
$B%M%C%H%o!<%/4X78$O$=$s$J$K>\$7$/$J$$$s$G$9$,(B($BA4HL$K>\$7$/$J$$$G$9$1$I(B)$B!"8)(B
$BN)?^=q4[$K$O!"$=$N@N$*@$OC$K$J$C$?$N$G!"H?1~$7$F$_$^$7$?!#(B^^)

On Thu, 9 Sep 1999, Yoshio Funaki wrote:
> $BA%LZ!w=)ED8)N)?^=q4[$G$9!#(B
> $B$$$m$$$mD4$Y$F$_$?$N$G$9$,!"MWNN$rF@$^$;$s$N$G!"%"%I%P%$%9(B
> $B$$$?$@$1$^$;$s$G$7$g$&$+!#(B

$B$4<ALd$NFbMF$,6qBNE*$G$OL5$/!"MWNN$rF@$^$;$s$N$G!"C/$+$i$b%"%I%P%$%9$O!"$$(B
$B$?$@$1$J$$$N$G$O$J$$$G$7$g$&$+(B? $B$^$?!"FbMF$,$b$m$K(B net-jp $B$M$?$J$N$G!"$=$A(B
$B$i$K?6$C$?J}$,!"$h$jE*3N$J2sEz$,F@$i$l$k$H;W$$$^$9!#(B

> client <--> firewall1 <---> firewall2 <--> server
> $B$H$$$&(Bnetwork$B$,$"$j$^$7$F!"(Bserver$B>e$G$&$4$$$F$$$k%"%W%j$,(B
> $B!V<u$1IU$1$k(BIP address$B#1$D$KBP$7$F#1$D$N%]!<%H$7$+MQ0U$7$J$$!W(B
> $B$H$$$&;EMM$N$?$a!"(Bproxy$B$r;H$($:!"J#?t$N(Bclient$B$,%5!<%S%9$r<u$1$h$&$H$9$k$H(B
> $B$I$&$7$F$b(BNAT$B$r;H$o$6$k$rF@$J$$$h$&$J$N$G$9$,!"(Bfirewall1,firewall2$B$H$b(B

$B%M%C%H%o!<%/$N6qBNE*$J9=@.$H!"%5!<%P$O6qBNE*$K2?$G$"$k$N$+!"(B client $B$N?t$,(B
$B$I$l$/$i$$$J$N$+!"$J$I$,2r$i$J$$$H$J$s$H$bEz$($h$&$,$"$j$^$;$s$,!"0J2<>!<j(B
$B$JA[A|$G=q$$$F8+$^$9!#(B

$B$^$:!"(Bfirewall $B$+$i30B&$O%0%m!<%P%k%"%I%l%9$N@$3&!"(Bfirewall $B$+$iFbB&$O%W%i(B
$B%$%Y!<%H%"%I%l%9$N@$3&$G$"$k!"$H2>Dj$7$FOC$r$7$^$9!#(B

1.$B9-5A$N(BNAT(= IP Masquerade)$B$r;HMQ$7$?>l9g!"(Bfirewall $B$+$i=P$F9T$/;~$OFbB&(B
$B$N(B client $B$,$I$l$G$"$C$F$b!"F1$8(B IP $B%"%I%l%9$,IU$-$^$9$N$G!"%5!<%PB&$+$i8+(B
$B$l$P!"F1$8Aj<j$+$i@\B3$5$l$kMM$K8+$($k$^$9!#$J$N$G!"0l8D$N(B client $B$7$+@\B3(B
$B$G$-$^$;$s!#$3$l$O!"(Bproxy $B$r;H$C$F$bF1$87k2L$G$9$M!#(B

2.$B695A$N(BNAT$B$r;HMQ$7$?>l9g!"%0%m!<%P%k%"%I%l%9$rJ#?t8D%W!<%k$7$F$*$$$F!"30(B
$B$K=P$F9T$3$&$H$9$k(B client $B$N%W%i%$%Y!<%H%"%I%l%9$r%0%m!<%P%k$KJQ49$7$F=P$7(B
$B$F$d$k;v$K$J$j$^$9!#$3$N>l9g!"%W!<%k$7$F$*$$$?%"%I%l%9$N8D?tJ,$N(B client $B$7(B
$B$+F1;~$K$O=P$F9T$1$J$$;v$K$J$j$^$9!#$3$l$OBt;3$N%0%m!<%P%k%"%I%l%9$r;HMQ=P(B
$BMh$k4D6-$G$J$$$H!"F1;~$KBt;3$N(B client $B$G$O;H$($^$;$s!#(B($B%W%i%$%Y!<%H%"%I%l(B
$B%9$H%0%m!<%P%k%"%I%l%9$O(B1$BBP(B1$B$N8GDjBP1~$@$C$?$+$O2r$j$^$;$s(B)

$B$H8@$&$3$H$G!"$b$&>/$76qBNE*$JFbMF$G!"(Bnet-jp $B$NJ}$K$4<ALd$5$l$?$i$$$+$,$G(B
$B$7$g$&!#(B

$B"#""""""(B - - - - - - - - - - - - - - - - - - - - - - - - - $B""""""(B
   Masashi WADA / $BOBED@5;V(B  <mwada@hitachi-ul.co.jp> - office
PGP fingerprint: E1 9F 87 0B 8F BA D5 75  B9 13 D2 80 22 94 91 7D
$B""""""(B - - - - - - - - - - - - - - - - - - - - - - - - - $B"""""""#(B

