From owner-FreeBSD-net-jp@jp.FreeBSD.org Wed Mar 13 15:30:53 2002
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Message-ID: <3C8EF21B.8080809@pop13.odn.ne.jp>
Date: Wed, 13 Mar 2002 15:30:51 +0900
From: Isamu Kanakubo <kanakubo@pop13.odn.ne.jp>
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Subject: [FreeBSD-net-jp 3586] PPPoE =?ISO-2022-JP?B?GyRCJE4bKEI=?= ftp
 =?ISO-2022-JP?B?GyRCJE4/NiRrSXEkJBsoQg==?= 
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$B6b5WJ]$H?=$7$^$9!#(B

$B%U%l%C%D(BADSL$B$N(BIP8$B$r(Brouter(4-stable$B$N(BPPP+IPFW)$B$H(Bnat(4-stable$B$N(BIPFW+natd)$B$rMxMQ$7$F%7%9%F%`$r:n$C$F$$$^$9!#(B

$B%W%i%$%Y!<%H%"%I%l%9B&$+$i(Bweb$B$H$+$O8+$l$k$h$&$K$J$C$?$N$G$9$,!"(Bftp$B$G(Bftp.jp.freebsd.org$B$+$i$G$+$$%U%!%$%k$r(Bget$B$9$k$H(Bstalled$B$K$J$C$F$7$^$$$^$9!#(B
$B$=$NB>$N(Bftp$B%5%$%H$K$O$G$-$k$H$3$m$H$G$-$J$$$H$3$m$,$"$j$^$9!#$G$-$J$$=j$G$O>o$KF1$8$H$3$m$G(Bstalled$B$K$J$j$^$9!#(B

$BEv=i$O(BPPPoE$B$N?9$5$s$N(BPath MTU Discovery Black Hole$B!W(B(http://csx.jp/~fex/adsl/mtu-ja.html)$B$+$H;W$$!"(Brouter$B$N(Bppp.conf$B$r(B
set max mtu 1300
set max mru 1300
$B$H$+$K$7$F$b(Bftp$B$O(Bstalled$B$N$^$^$G$9!#(B

ftp$B%/%i%$%"%s%H$rF0$+$7$F$$$k%[%9%H$G(Btcpdump$B$G8+$?$H$3$m!"(Blen1300$B$G(Bppp$B$N(Btcpmssfixup$B$O@5>o$KF0:n$7$F$$$^$9$,!"(Back 660241$B$r%m!<%+%kB&$,$R$?$9$iJV$=$&$9$k>u67$K$J$C$F$7$^$$$^$9!#(B
$B$A$J$_$K(Bnat$B$d(Brouter$B$G(Btcpdump$B$r$7$F$bF1$8>u67$G$9$N$G!"ESCf$G%Q%1%C%H$,H4$1$F$$$k$h$&$K$b;W$($^$;$s!#(B

$B$3$N$h$&$J(Bftp$B$N?6$kIq$$$O$J$<$J$N$G$7$g$&$+!)(B


14:57:08.091475 192.168.1.2.1033 > 210.171.226.36.49620: S [tcp sum ok] 99181342:99181342(0) win 16384 <mss 1460,nop,wscale 0,nop,nop,timestamp 41114 0> (DF) (ttl 64, id 684, len 60)
14:57:08.190870 192.168.1.2.1025 > 210.171.226.36.21: . [tcp sum ok] ack 2196 win 17640 (DF) [tos 0x10]  (ttl 64, id 687, len 40)
14:57:08.314966 210.171.226.36.49620 > 192.168.1.2.1033: S [tcp sum ok] 747056095:747056095(0) ack 99181343 win 17640 <mss 1260> (DF) (ttl 50, id 54196, len 44)
14:57:08.315052 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 1 win 17640 (DF) (ttl 64, id 688, len 40)
14:57:08.315247 192.168.1.2.1025 > 210.171.226.36.21: P [tcp sum ok] 264:284(20) ack 2196 win 17640 (DF) [tos 0x10]  (ttl 64, id 689, len 60)
14:57:08.515097 210.171.226.36.21 > 192.168.1.2.1025: P 2196:2276(80) ack 284 win 17640 (DF) [tos 0x10]  (ttl 50, id 54545, len 120)
14:57:08.610869 192.168.1.2.1025 > 210.171.226.36.21: . [tcp sum ok] ack 2276 win 17640 (DF) [tos 0x10]  (ttl 64, id 691, len 40)
14:57:08.917628 210.171.226.36.49620 > 192.168.1.2.1033: . 1:1261(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 55078, len 1300)
14:57:08.925331 210.171.226.36.49620 > 192.168.1.2.1033: . 1261:2521(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 55079, len 1300)
14:57:08.925415 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 2521 win 16380 (DF) [tos 0x8]  (ttl 64, id 692, len 40)
14:57:09.096550 210.171.226.36.49620 > 192.168.1.2.1033: . 2521:3781(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 55290, len 1300)
14:57:09.096702 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 3781 win 17640 (DF) [tos 0x8]  (ttl 64, id 693, len 40)
14:57:09.117924 210.171.226.36.49620 > 192.168.1.2.1033: . 3781:5041(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 55291, len 1300)
14:57:09.119001 210.171.226.36.49620 > 192.168.1.2.1033: . 5041:6301(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 55292, len 1300)
14:57:09.119084 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 6301 win 16380 (DF) [tos 0x8]  (ttl 64, id 694, len 40)
14:57:09.267505 210.171.226.36.49620 > 192.168.1.2.1033: . 6301:7561(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 55575, len 1300)
14:57:09.267636 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 7561 win 17640 (DF) [tos 0x8]  (ttl 64, id 698, len 40)
14:57:09.284334 210.171.226.36.49620 > 192.168.1.2.1033: . 7561:8821(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 55598, len 1300)
14:57:09.291954 210.171.226.36.49620 > 192.168.1.2.1033: . 8821:10081(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 55599, len 1300)
14:57:09.292041 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 10081 win 16380 (DF) [tos 0x8]  (ttl 64, id 699, len 40)
14:57:09.467482 210.171.226.36.49620 > 192.168.1.2.1033: . 10081:11341(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 55862, len 1300)
14:57:09.467590 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 11341 win 17640 (DF) [tos 0x8]  (ttl 64, id 700, len 40)
***********************************$BESCf>JN,(B**************************************************************************************
14:57:18.274504 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 658981 win 16380 (DF) [tos 0x8]  (ttl 64, id 1162, len 40)
14:57:18.282078 210.171.226.36.49620 > 192.168.1.2.1033: . 658981:660241(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2341, len 1300)
14:57:18.282174 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1163, len 40)
14:57:18.315890 210.171.226.36.49620 > 192.168.1.2.1033: . 660241:661501(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2406, len 1300)
14:57:18.385350 210.171.226.36.49620 > 192.168.1.2.1033: . 661501:662761(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2533, len 1300)
14:57:18.385427 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1164, len 40)
14:57:18.393165 210.171.226.36.49620 > 192.168.1.2.1033: . 662761:664021(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2534, len 1300)
14:57:18.393234 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1165, len 40)
14:57:18.400791 210.171.226.36.49620 > 192.168.1.2.1033: . 664021:665281(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2537, len 1300)
14:57:18.400852 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1166, len 40)
14:57:18.465832 210.171.226.36.49620 > 192.168.1.2.1033: . 665281:666541(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2692, len 1300)
14:57:18.465905 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1167, len 40)
14:57:18.466904 210.171.226.36.49620 > 192.168.1.2.1033: . 666541:667801(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2693, len 1300)
14:57:18.466962 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1168, len 40)
14:57:18.468129 210.171.226.36.49620 > 192.168.1.2.1033: . 667801:669061(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2702, len 1300)
14:57:18.468189 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1169, len 40)
14:57:18.474489 210.171.226.36.49620 > 192.168.1.2.1033: . 669061:670321(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2707, len 1300)
14:57:18.474559 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1170, len 40)
14:57:18.482365 210.171.226.36.49620 > 192.168.1.2.1033: . 670321:671581(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2708, len 1300)
14:57:18.482438 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1171, len 40)
14:57:18.490001 210.171.226.36.49620 > 192.168.1.2.1033: . 671581:672841(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2709, len 1300)
14:57:18.490064 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1172, len 40)
14:57:18.497866 210.171.226.36.49620 > 192.168.1.2.1033: . 672841:674101(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2739, len 1300)
14:57:18.497934 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1173, len 40)
14:57:18.586017 210.171.226.36.49620 > 192.168.1.2.1033: . 660241:661501(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2841, len 1300)
14:57:18.632982 210.171.226.36.49620 > 192.168.1.2.1033: . 674101:675361(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2879, len 1300)
14:57:18.633067 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1175, len 40)
14:57:18.640521 210.171.226.36.49620 > 192.168.1.2.1033: P 675361:676621(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 2883, len 1300)
14:57:18.640584 192.168.1.2.1033 > 210.171.226.36.49620: . [tcp sum ok] ack 660241 win 17640 (DF) [tos 0x8]  (ttl 64, id 1176, len 40)
14:57:20.419300 210.171.226.36.49620 > 192.168.1.2.1033: . 660241:661501(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 5336, len 1300)
14:57:23.468217 210.171.226.36.49620 > 192.168.1.2.1033: . 660241:661501(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 9304, len 1300)
14:57:29.463867 210.171.226.36.49620 > 192.168.1.2.1033: . 660241:661501(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 15985, len 1300)
14:57:41.437319 210.171.226.36.49620 > 192.168.1.2.1033: . 660241:661501(1260) ack 1 win 17640 (DF) [tos 0x8]  (ttl 50, id 30366, len 1300)

-- 
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$B6b5WJ]!!M&(B            kanakubo@pop13.odn.ne.jp
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