Getting external IP address of NAT

[Yasushi Shinjo]

$B?7>k!wC^GHBg3X>pJs$G$9!#$3$s$K$A$O!#(B

NAT $B$r9T$&%k!<%?$,$"$j$^$9!#(BNAT $B$NFbB&$G$O!"%W%i%$%Y!<%H!&%"(B
$B%I%l%9$r;H$C$F$$$F!"(BNAT $B$G%0%m!<%P%k$KJQ49$7$F$$$^$9!#(BNAT $B$N(B
$BFbB&$K$"$k%3%s%T%e!<%?$G!"(BNAT $B$N30B&$N%"%I%l%9$rCN$k$&$^$$J}(B
$BK!$O$J$$$G$7$g$&$+!#(BNAT $B$O!"(B1$BBP(B1$B$G$O$J$/$F!"(BN:1 $B$G!"=8Ls$9$k(B
$B%?%$%W$N$b$N$G$9!#(B

$B#1$D;W$$$D$$$?$N$O!"30B&$K$"$k(B Web $B%5!<%P$G!"(BCGI $B$rF0$+$7$F!"(B
REMOTE_ADDR $B$r<h$k$H$$$&J}K!$G$9!#(BWeb $B%5!<%P$r0];}$9$k$N$,>/(B
$B$7LLE]$G$9!#(B

Dynamic DNS $B$r;H$C$?$j$9$k$H!"%"%I%l%9$NEPO?$G$3$N$h$&$JLdBj(B
$B$,@8$8$k$N$G$O$J$$$+$H;W$$$^$9!#(BNAT Box $B<+BN$G$d$l$P!"Bg>fIW(B
$B$J$N$G$7$g$&$1$l$I!"FbB&$N%3%s%T%e!<%?$G$d$m$&$H$9$k$H!"F1$8(B
$BLdBj$,=P$F$/$k$N$G$O$J$$$+$H;W$$$^$9!#:#2s$O!"(BDynamic DNS $B$^(B
$B$G$OMW$i$J$$$N$G$9$,!"(BDynamic DNS $B4XO"$N%D!<%k$G2r7h$G$-$k$J(B
$B$i!"$=$l$G$b$"$j$,$?$$$G$9!#(B

$B$h$m$7$/$*4j$$$7$^$9!#(B

$B!@!@!!?7>k!!Lw!!!J$7$s$8$g$&!!$d$9$7!K!!!@!@(B
$B!@!@!!C^GHBg3X!!EE;R!&>pJs!!!!!!!!!!!!!!!@!@(B

[Shinji KONO]

$B2OLn??<#(B @ $BN05eBg3X>pJs9)3X$G$9!#(B

$B$3$N<j$N<ALd$O!"$b$C$H!V2?$,$7$?$$$N$+!W$r$O$C$-$j=q$$$F$b$i(B
$B$C$?J}$,$&$l$7$$$G$9!#(B

Post by Yasushi Shinjo
NAT $B$r9T$&%k!<%?$,$"$j$^$9!#(BNAT $B$NFbB&$G$O!"%W%i%$%Y!<%H!&%"(B
$B%I%l%9$r;H$C$F$$$F!"(BNAT $B$G%0%m!<%P%k$KJQ49$7$F$$$^$9!#(BNAT $B$N(B
$BFbB&$K$"$k%3%s%T%e!<%?$G!"(BNAT $B$N30B&$N%"%I%l%9$rCN$k$&$^$$J}(B
$BK!$O$J$$$G$7$g$&$+!#(BNAT $B$O!"(B1$BBP(B1$B$G$O$J$/$F!"(BN:1 $B$G!"=8Ls$9$k(B
$B%?%$%W$N$b$N$G$9!#(B

$B$=$l$rCN$C$F$b!"(BRouter $BB&$G!"$3$A$i$KE>Aw$7$F$/$l$J$1$l$P!"(B
$BLr$KN)$A$^$;$s!#(BRouer $BB&$,L5;k$9$k8B$j!"2?$d$C$F$bL5BL$G$9!#(B
Dynamic DNS $B$G$b$@$a!#(B

our global IP g:port x ------> my local IP l : port y

$B$^$!!"$=$l$,(BNAT$B$NFbB&$,0BA4$JM}M3$J$o$1$@$7!#(B

$B0lC6!"$3$A$i$+$i30$K=P$l$P!"(B

other global IP g:port x <-----> my local IP l : port y

$BAPJ}8~$KDL$8$k$o$1$G$9$1$I(B....

$B30B&$K%5!<%P$,$"$k$J$i!"7k6I!"%H%s%M%k7!$k$N$,3N<B$@$H;W$&!#(B

---
Shinji KONO @ Information Engineering, University of the Ryukyus
$B2OLn??<#(B @ $BN05eBg3X9)3XIt>pJs9)3X2J(B

[Yasushi Shinjo]

$B?7>k!wC^GHBg3X>pJs$G$9!#$3$s$K$A$O!#(B

Post by Masamichi Takatsu
$B2DG=$G$9!#;d$O(B
http://www.bosuke.mine.nu/neta/upnp.shtml
$B$r;29M$K$7$^$7$?!#(B

$B$J$k$[$I!#(BSOAP $B$G(B GetExternalIPAddress $B$FEj$2$k$o$1$M!#LLGr(B
$B$$$G$9!#(B
$B:G6a$O!"(BUPnP $B$G!">!<j$K%k!<%?$***@_Dj$r=q$-49$($F%]!<%H$r3+$/(B
$B$H$$$&%o!<%`$b$"$k$7!"8D?ME*$K$O$"$s$^$j;H$$$?$/$O$J$$5!G=$G(B
$B$O$"$j$^$9!#(B

Unix (MacOSX) $B$G(B UPnP $B$r$7$c$Y$k%W%m%0%i%`$r=q$/$H$9$k$H!"$I(B
$B$&$9$l$P3Z$G$7$g$&$+!#(B

Post by Masamichi Takatsu

Post by Yasushi Shinjo
$B#1$D;W$$$D$$$?$N$O!"30B&$K$"$k(B Web $B%5!<%P$G!"(BCGI $B$rF0$+$7$F!"(B
REMOTE_ADDR $B$r<h$k$H$$$&J}K!$G$9!#(BWeb $B%5!<%P$r0];}$9$k$N$,>/(B
$B$7LLE]$G$9!#(B

$B$I$C$+$NE,Ev$J(B SMTP $B%5!<%P$K(B HELO $B$7$F!"$=$NJV;v$r8+$k$H$$$&$,4JC1$8$c(B
$B$J$$$G$7$g$&$+!#(B

$B$3$l$O!"LLGr$$$G$9$M!#$A$g$C$H2x$7$$F0$-$J$N$G!"Aj<j$K967b$H(B
$B;W$o$l$k$H:$$j$^$9$,!"$=$&$G$J$$;~$K$O;H$($^$9$M!#(B

$B%a!<%k$G!"$3$s$J(B URL $B$r65$($F$b$$$^$7$?!#$"$j$,$H$&$4$6$$$^(B
$B$7$?!#(B
http://checkip.dyndns.org/
Dynamic DNS $B$r$d$C$F$$$=$&$J%5%$%H$N$*$^$1$+$J!#(B

Post by Masamichi Takatsu
$B$3$N<j$N<ALd$O!"$b$C$H!V2?$,$7$?$$$N$+!W$r$O$C$-$j=q$$$F$b$i(B
$B$C$?J}$,$&$l$7$$$G$9!#(B

$B$=$l$O!"$d$dHkL)$K$7$?$$=j$O$"$j$^$9!#(B

Post by Masamichi Takatsu
$B$=$l$rCN$C$F$b!"(BRouter $BB&$G!"$3$A$i$KE>Aw$7$F$/$l$J$1$l$P!"(B
$BLr$KN)$A$^$;$s!#(B

$B$b$A$m$s!"(BNAT $B$r$d$C$F$$$k%k!<%?$G$OFCDj$N%]!<%HHV9f$rFCDj$N(B
$B%W%i%$%Y!<%H!&%"%I%l%9$NFCDj$N%]!<%HHV9f$KE>Aw$9$k$h$&$***@_Dj(B
$B$7$^$9!#%]!<%HHV9f$O!"$o$+$k$1$l$I!"%k!<%?<+?H$N30B&$N(B IP $B%"(B
$B%I%l%9$,I,MW$G$9!#(B
$B%H%s%M%k$@$H!"(BNAT $BB&$r30It$N%5!<%PB&$N%M%C%H%o!<%/$KF~$l$k$H(B
$B$$$&OC$K$J$j$^$9$h$M!#$=$l$O!":#$O$d$j$?$/$J$$$G$9!#5U$J$i$$(B
$B$$$1$l$I!#(B

$B!@!@!!?7>k!!Lw!!!J$7$s$8$g$&!!$d$9$7!K!!!@!@(B
$B!@!@!!C^GHBg3X!!EE;R!&>pJs!!!!!!!!!!!!!!!@!@(B

[Masamichi Takatsu]

$B$?$+$D$G$9!#(B


$B5-;v(B <***@kirk.is.tsukuba.ac.jp> $B$G(B
Yasushi Shinjo$B$5$s$O=q$-$^$7$?(B

Post by Yasushi Shinjo
NAT $B$r9T$&%k!<%?$,$"$j$^$9!#(BNAT $B$NFbB&$G$O!"%W%i%$%Y!<%H!&%"(B
$B%I%l%9$r;H$C$F$$$F!"(BNAT $B$G%0%m!<%P%k$KJQ49$7$F$$$^$9!#(BNAT $B$N(B
$BFbB&$K$"$k%3%s%T%e!<%?$G!"(BNAT $B$N30B&$N%"%I%l%9$rCN$k$&$^$$J}(B
$BK!$O$J$$$G$7$g$&$+!#(B

$B%k!<%?!<$,(B UPnP $B$KBP1~$7$F$$$k$N$J$i!"(BUPnP$B$G%0%m!<%P%k%"%I%l%9$N<hF@$,(B
$B2DG=$G$9!#;d$O(B

http://www.bosuke.mine.nu/neta/upnp.shtml

$B$r;29M$K$7$^$7$?!#(B

$B%k!<%?!<$r5!<o8BDj$7$F(BIP$B%"%I%l%9$bJ,$+$C$F$$$k>u67$J$i!"%W%m%0%i%`$r(B
$BAH$^$J$/$F$b!"%j%/%(%9%HMQ$N(Bxml$B%G!<%?$r$"$i$+$8$a:n$C$F$*$$$FAw$j(B
$B$D$1$l$P4JC1$K<hF@$G$-$k$H;W$$$^$9!#(B



UPnP $BHsBP1~$J%k!<%?!<$G$b!"(Bweb $B7PM3$H$+(B telnet $B$H$+$GDL?.>uBV$NI=<($,(B
$B$G$-$k$N$J$i!"%k!<%?!<$K%m%0%$%s$7$FDL?.>u67$r<hF@$9$k%9%/%j%W%H$+2?$+$r(B
$BAv$i$;$k$H$$$&J}K!$b$"$j$^$9$M!#(B

$BDL?.>u67$rI=<($9$k%Z!<%8$r$$$-$J$j(B GET $B$7$F$d$k!"$H!#(B


$B$=$l$bL5M}$H$J$k$H!"(B

Post by Yasushi Shinjo
$B#1$D;W$$$D$$$?$N$O!"30B&$K$"$k(B Web $B%5!<%P$G!"(BCGI $B$rF0$+$7$F!"(B
REMOTE_ADDR $B$r<h$k$H$$$&J}K!$G$9!#(BWeb $B%5!<%P$r0];}$9$k$N$,>/(B
$B$7LLE]$G$9!#(B

$B$3$NJ}8~$G$9$,!"(B

$B$I$C$+$NE,Ev$J(B SMTP $B%5!<%P$K(B HELO $B$7$F!"$=$NJV;v$r8+$k$H$$$&$,4JC1$8$c(B
$B$J$$$G$7$g$&$+!#(B

Post by Yasushi Shinjo
% telnet doga.jp smtp
Trying 219.117.196.238...
Connected to doga.jp.
Escape character is '^]'.
HELO example.com
250 maha2.doga.co.jp Hello 219.117.196.43.user.rb.il24.net [219.117.196.43], pleased to meet you

$B$3$s$J46$8$G$9!#(B

PROJECT TEAM $B#D#o#G#A(B $***@5F;(B ***@doga.jp
***@nifty.ne.jp
PROJECT TEAM DoGA$B$N%[!<%`%Z!<%8(B $B"*(B http://doga.jp/
8$B7n(B11$BF|(B($B6b(B) $B:#F|$N%^!<%U%#!<$NK!B'(B [$B7]=Q$*$h$S2J3X$K$*$1$k2+6bN((B]
$B5,B'$O!"2+6b$r;}$D<T$K$h$C$F:n$i$l$k!#(B