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Date: Tue, 27 Mar 2001 09:57:30 +0900
Message-ID: <ybshf0g3u6d.wl@ett.sat.t.u-tokyo.ac.jp>
From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>
To: FreeBSD-net-jp@jp.freebsd.org
In-Reply-To: <20010326210816.0F72.MARINA@yaya.forks.co.jp>
References: <20010326210816.0F72.MARINA@yaya.forks.co.jp>
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Subject: [FreeBSD-net-jp 3037] Re: about a PPPoE(ADSL)+nat problem
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> $B$3$3$GBg$-$J0c$$$K5$$,IU$-$^$7$?!#(B
> $B<+Bp$N(Btcpdump$B$O%/%i%$%"%s%H%^%7%s$N(BIP$B$J$N$K(B
> $B2q<R$G$N(Btcpdump$B$O%0%m!<%P%k(BIP$B$G$9!#(B

$B<+Bp$G$O(B, ppp $B$G(B nat $B$+$1$F$k$+$i(B, tun0 $B$O(B nat $B$NFbB&(B.
$B2q<R$G$O(B, natd $B$G(B nat $B$+$1$F$k$+$i(B, ed0 $B$O(B nat $B$N30B&(B
$B$@$+$i(B, $B$=$&$J$i$J$$$H$^$:$$$N$G$O(B?

$BA08e$7$^$9$,(B,

> NG case ($B<+Bp(BADSL)
> win98 --> ppp-nat(PPPoE) --> internet --> member.nifty.ne.jp
>         dc0            ed0
> 
> nat$BFb$K$"$k%/%i%$%"%s%H(BWin98$B$N%V%i%&%6$G(Bmember.nifty.ne.jp$B$r8+$k$H(B
> $B%5!<%P$+$i$N1~Ez$rBT$C$F$$$^$9$N>uBV$K$J$j$=$N$^$^(B
> 
> $B$=$N;~$N(Btcpdump
> su-2.04# tcpdump -i tun0 host member.nifty.ne.jp
> 06:10:13.780598 tp535.marina.home.2594 > member.nifty.ne.jp.http: S 123341200:12
> 3341200(0) win 8192 <mss 1460,nop,nop,sackOK> (DF)
> 06:10:13.827022 member.nifty.ne.jp.http > tp535.marina.home.2594: S 2511647840:2
> 511647840(0) ack 123341201 win 8760 <mss 1460> (DF)
> 06:10:13.827546 tp535.marina.home.2594 > member.nifty.ne.jp.http: . ack 1 win 87
> 60 (DF)
> 06:10:13.829509 tp535.marina.home.2594 > member.nifty.ne.jp.http: P 1:327(326) a
> ck 1 win 8760 (DF)
> 06:10:13.881932 member.nifty.ne.jp.http > tp535.marina.home.2594: . ack 327 win
> 8760 (DF)
> 06:10:13.907030 member.nifty.ne.jp.http > tp535.marina.home.2594: P 1:228(227) a
> ck 327 win 8760 (DF)
> 06:10:14.107273 tp535.marina.home.2594 > member.nifty.ne.jp.http: . ack 228 win
> 8533 (DF)
> 06:10:14.166130 member.nifty.ne.jp.http > tp535.marina.home.2594: F 1688:2481(79
> 3) ack 327 win 8760 (DF)
> 06:10:14.167784 tp535.marina.home.2594 > member.nifty.ne.jp.http: . ack 228 win
> 8533 (DF)

$B$3$N$J$+$G(B, 
06:10:14.166130 member.nifty.ne.jp.http > tp535.marina.home.2594: F 1688:2481(793) ack 327 win 8760 (DF)

$B$,(B windoze $BB&$KFO$$$F$J$$$h$&$G$9$M(B.
dc0 $BB&$G$b(B tap $B$7$F$_$F(B, FreeBSD$BB&$+(Bwindows$BB&$NLdBj$+@Z$jJ,$1$F$_$F$O(B
$B$I$&$G$7$g$&$+(B?

/\ Hidetoshi Shimokawa
\/  simokawa@sat.t.u-tokyo.ac.jp
PGP public key: http://www.sat.t.u-tokyo.ac.jp/~simokawa/pgp.html




