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             <19980305144637F.yamagata@nwgpc.kek.jp>
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$B8~F|;T$N0$It$G$9!#(B
In message of "Thu, 05 Mar 1998 14:46:37 +0900"
    yamagata@nwgpc.kek.jp$B!!(Bwrote
>ping$B$G%@%C%@%C%@$HICC10L$GAw=P$7$F!"(B
>tcpdump$B$G%O%?$+$i8+$F$k$H$I$&8+$($k$N$G$7$g$&!#(B
>
>--
tcpdump$B$G4Q;!$7$F$_$^$7$?!#7k2L$O0J2<$NDL$j$G$9!#2?$,$*$-$F$$$k$N$+(B
$B2r<a$O$^$@$G$-$F$$$^$;$s!#>/$7JY6/$7$?$$$N$G$9$,!"(BUNIX MAGAZINE$B$N(B
$B%P%C%/%J%s%P!<Ey$K(Btcpdump$B4XO"$N5-;v$J$+$C$?$G$7$g$&$+!#(B

=====================================================================
<on pc010>
ping -s 4096 -i 1 pc007_10
PING pc007_10 (163.50.129.245): 4096 data bytes
4104 bytes from 163.50.129.245: icmp_seq=0 ttl=255 time=1.068 ms
4104 bytes from 163.50.129.245: icmp_seq=1 ttl=255 time=1.270 ms
4104 bytes from 163.50.129.245: icmp_seq=2 ttl=255 time=2.554 ms
4104 bytes from 163.50.129.245: icmp_seq=3 ttl=255 time=2.098 ms
4104 bytes from 163.50.129.245: icmp_seq=4 ttl=255 time=0.995 ms
4104 bytes from 163.50.129.245: icmp_seq=5 ttl=255 time=2.155 ms
^C
--- pc007_10 ping statistics ---
6 packets transmitted, 6 packets received, 0% packet loss
round-trip min/avg/max = 0.995/1.689/2.554 ms

<on pc007>
tcpdump -ni de3 icmp
tcpdump: listening on de3
20:03:39.801457 163.50.129.246 > 163.50.129.245: icmp: echo request 
(frag 12330:1480@0+)
20:03:39.801579 163.50.129.246 > 163.50.129.245: (frag 12330:1480@1480+)
20:03:39.801673 163.50.129.246 > 163.50.129.245: (frag 12330:1144@2960)
20:03:39.801925 163.50.129.245 > 163.50.129.246: icmp: echo reply 
(frag 6262:1480@0+)
20:03:39.802049 163.50.129.245 > 163.50.129.246: (frag 6262:1480@1480+)
20:03:39.802142 163.50.129.245 > 163.50.129.246: (frag 6262:1144@2960)
20:03:40.811309 163.50.129.246 > 163.50.129.245: icmp: echo request 
(frag 12340:1480@0+)
20:03:40.811317 163.50.129.246 > 163.50.129.245: (frag 12340:1480@1480+)
20:03:40.811322 163.50.129.246 > 163.50.129.245: (frag 12340:1144@2960)
20:03:40.811588 163.50.129.245 > 163.50.129.246: icmp: echo reply 
(frag 6276:1480@0+)
20:03:40.811712 163.50.129.245 > 163.50.129.246: (frag 6276:1480@1480+)
20:03:40.811804 163.50.129.245 > 163.50.129.246: (frag 6276:1144@2960)
20:03:41.822573 163.50.129.246 > 163.50.129.245: icmp: echo request 
(frag 12350:1480@0+)
20:03:41.822581 163.50.129.246 > 163.50.129.245: (frag 12350:1480@1480+)
20:03:41.822586 163.50.129.246 > 163.50.129.245: (frag 12350:1144@2960)
20:03:41.822847 163.50.129.245 > 163.50.129.246: icmp: echo reply 
(frag 6290:1480@0+)
20:03:41.822971 163.50.129.245 > 163.50.129.246: (frag 6290:1480@1480+)
20:03:41.823063 163.50.129.245 > 163.50.129.246: (frag 6290:1144@2960)
20:03:42.832088 163.50.129.246 > 163.50.129.245: icmp: echo request 
(frag 12360:1480@0+)
20:03:42.832096 163.50.129.246 > 163.50.129.245: (frag 12360:1480@1480+)
20:03:42.832101 163.50.129.246 > 163.50.129.245: (frag 12360:1144@2960)
20:03:42.832367 163.50.129.245 > 163.50.129.246: icmp: echo reply 
(frag 6304:1480@0+)
20:03:42.832490 163.50.129.245 > 163.50.129.246: (frag 6304:1480@1480+)
20:03:42.832581 163.50.129.245 > 163.50.129.246: (frag 6304:1144@2960)
20:03:43.840777 163.50.129.246 > 163.50.129.245: icmp: echo request 
(frag 12370:1480@0+)
20:03:43.840898 163.50.129.246 > 163.50.129.245: (frag 12370:1480@1480+)
20:03:43.840992 163.50.129.246 > 163.50.129.245: (frag 12370:1144@2960)
20:03:43.841236 163.50.129.245 > 163.50.129.246: icmp: echo reply 
(frag 6318:1480@0+)
20:03:43.841361 163.50.129.245 > 163.50.129.246: (frag 6318:1480@1480+)
20:03:43.841453 163.50.129.245 > 163.50.129.246: (frag 6318:1144@2960)
20:03:44.852088 163.50.129.246 > 163.50.129.245: icmp: echo request 
(frag 12380:1480@0+)
20:03:44.852095 163.50.129.246 > 163.50.129.245: (frag 12380:1480@1480+)
20:03:44.852101 163.50.129.246 > 163.50.129.245: (frag 12380:1144@2960)
20:03:44.852369 163.50.129.245 > 163.50.129.246: icmp: echo reply 
(frag 6331:1480@0+)
20:03:44.852493 163.50.129.245 > 163.50.129.246: (frag 6331:1480@1480+)
20:03:44.852585 163.50.129.245 > 163.50.129.246: (frag 6331:1144@2960)

<netstat 1 on pc010>
           input        (Total)           output
   packets  errs      bytes    packets  errs      bytes colls
        5     0        466          0     0        970     0
         7     0        614          0     0        990     0
         8     0        720         31     0       1120     0
        17     0       5250          8     0       6664     0
         7     0       4566         27     0       5432     0
         6     0       4492          0     0       5432     0
         6     0       4492         24     0       5432     0
         6     0       4492          0     0       5432     0
         9     0       4810         24     0       6044     0
         2     0        180          0     0        776     0
         9     0        922          0     0       1142     0
         4     0        360          0     0        722     0

<netstat 1 on pc007>
           input        (Total)           output
   packets  errs      bytes    packets  errs      bytes colls
        15     0       1690          7     0       2508     0
        16     0       1828         37     0       2098     0
        18     0       2024          8     0       2262     0
        14     0       1632          6     0       1944     0
        28     0       7248         42     0       7560     0
        21     0       6290         38     0       8062     0
        20     0       6216          6     0       7988     0
        20     0       6216         37     0       7988     0
        20     0       6216         37     0       7988     0
        22     0       6428         38     0       7980     0
        17     0       2278          4     0       3726     0
        11     0       1326          4     0       1638     0
        25     0       2742         40     0       2636     0
         8     0        972          2     0       1284     0
        12     0       1396          2     0       1524     0


=================================================================

$B$D$$$G$K!"(Bttcp$B$r<B9T$7$?;~$N(Btcpdump$B$N7k2L$G$9(B
<on pc007>
./ttcp -r -s -p 2010 pc007_10   
ttcp-r: socket
ttcp-r: accept from 163.50.129.246
ttcp-r: buflen=8192, nbuf=2048, align=16384/0, port=2010  tcp
ttcp-r: 40960 bytes in 8.57 real seconds = 4.67 KB/sec +++
ttcp-r: 25 I/O calls, msec/call = 351.18, calls/sec = 2.92
ttcp-r: 0.0user 0.0sys 0:08real 0% 0i+0d 18maxrss 0+2pf 22+6csw


<on pc010>
./ttcp -t -s -p 2010 -n5 pc007_10   
ttcp-t: socket
ttcp-t: connect
ttcp-t: buflen=8192, nbuf=5, align=16384/0, port=2010  tcp  -> pc007_10
ttcp-t: 40960 bytes in 5.57 real seconds = 7.18 KB/sec +++
ttcp-t: 5 I/O calls, msec/call = 1141.44, calls/sec = 0.90
ttcp-t: 0.0user 0.0sys 0:05real 0% 0i+0d 278maxrss 0+2pf 7+0csw

<on pc007>
tcpdump: listening on de3
20:32:39.052390 163.50.129.246.1045 > 163.50.129.245.2010: 
S 650402958:650402958(0) win 16384 <mss 1460,nop,wscale 0,nop,nop,timestamp[|tcp]> (DF)
20:32:39.052581 163.50.129.245.2010 > 163.50.129.246.1045: 
S 564969671:564969671(0) ack 650402959 win 17280 <mss 1460,nop,wscale 0,nop,nop,timestamp[|tcp]> (DF)
20:32:39.052689 163.50.129.246.1045 > 163.50.129.245.2010: 
. ack 1 win 17280 <nop,nop,timestamp 1540381 5907,nop,nop,eol,[|tcp]> (DF)
20:32:39.054394 163.50.129.246.1045 > 163.50.129.245.2010: 
. 1:1441(1440) ack 1 win 17280 <nop,nop,timestamp 1540381 5907,nop,nop,[|tcp]> (DF)
20:32:39.054449 163.50.129.246.1045 > 163.50.129.245.2010: 
P 1441:2049(608) ack 1 win 17280 <nop,nop,timestamp 1540381 5907,nop,nop,eol,[|tcp]> (DF)
20:32:39.054580 163.50.129.246.1045 > 163.50.129.245.2010: 
. 2049:3489(1440) ack 1 win 17280 <nop,nop,timestamp 1540381 5907,nop,nop,eol,[|tcp]> (DF)
20:32:39.054702 163.50.129.246.1045 > 163.50.129.245.2010: 
. 3489:4929(1440) ack 1 win 17280 <nop,nop,timestamp 1540381 5907,nop,nop,[|tcp]> (DF)
20:32:39.055114 163.50.129.246.1045 > 163.50.129.245.2010: 
. 6369:7809(1440) ack 1 win 17280 <nop,nop,timestamp 1540381 5907,nop,nop,eol,[|tcp]> (DF)
20:32:39.055120 163.50.129.246.1045 > 163.50.129.245.2010: 
. 7809:9249(1440) ack 1 win 17280 <nop,nop,timestamp 1540381 5907,nop,nop,eol,[|tcp]> (DF)
20:32:39.055127 163.50.129.246.1045 > 163.50.129.245.2010: 
. 9249:10689(1440) ack 1 win 17280 <nop,nop,timestamp 1540381 5907,nop,nop,[|tcp]> (DF)
20:32:39.055134 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 3489 win 17280 <nop,nop,timestamp 5907 1540381,nop,nop,[|tcp]> (DF)
20:32:39.055245 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 4929 win 15840 <nop,nop,timestamp 5907 1540381,nop,nop,eol,[|tcp]> (DF)
20:32:39.055306 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 4929 win 15840 <nop,nop,timestamp 5907 1540381,nop,nop,[|tcp]> (DF)
20:32:39.055365 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 4929 win 15840 <nop,nop,timestamp 5907 1540381,nop,nop,eol,[|tcp]> (DF)
20:32:40.125948 163.50.129.246.1045 > 163.50.129.245.2010: 
. 1:1441(1440) ack 1 win 17280 <nop,nop,timestamp 1540383 5907,nop,nop,eol,[|tcp]> (DF)
20:32:40.126043 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 4929 win 17280 <nop,nop,timestamp 5910 1540383,nop,nop,eol,[|tcp]> (DF)
20:32:40.126245 163.50.129.246.1045 > 163.50.129.245.2010: 
. 4929:6369(1440) ack 1 win 17280 <nop,nop,timestamp 1540384 5910,nop,nop,eol,[|tcp]> (DF)
20:32:40.126706 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 10689 win 11520 <nop,nop,timestamp 5910 1540384,nop,nop,[|tcp]> (DF)
20:32:40.126850 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 10689 win 17280 <nop,nop,timestamp 5910 1540384,nop,nop,eol,[|tcp]> (DF)
20:32:40.127040 163.50.129.246.1045 > 163.50.129.245.2010: 
. 10689:12129(1440) ack 1 win 17280 <nop,nop,timestamp 1540384 5910,nop,nop,eol,[|tcp]> (DF)
20:32:40.127161 163.50.129.246.1045 > 163.50.129.245.2010: 
. 12129:13569(1440) ack 1 win 17280 <nop,nop,timestamp 1540384 5910,nop,nop,eol,[|tcp]> (DF)
20:32:40.127252 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 13569 win 17280 <nop,nop,timestamp 5910 1540384,nop,nop,eol,[|tcp]> (DF)
20:32:41.625896 163.50.129.246.1045 > 163.50.129.245.2010: 
. 10689:12129(1440) ack 1 win 17280 <nop,nop,timestamp 1540386 5910,nop,nop,eol,[|tcp]> (DF)
20:32:41.625974 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 13569 win 17280 <nop,nop,timestamp 5913 1540386,nop,nop,eol,[|tcp]> (DF)
20:32:41.626163 163.50.129.246.1045 > 163.50.129.245.2010: 
. 13569:15009(1440) ack 1 win 17280 <nop,nop,timestamp 1540387 5913,nop,nop,eol,[|tcp]> (DF)
20:32:41.626286 163.50.129.246.1045 > 163.50.129.245.2010: 
. 15009:16449(1440) ack 1 win 17280 <nop,nop,timestamp 1540387 5913,nop,nop,[|tcp]> (DF)
20:32:41.626379 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 16449 win 17280 <nop,nop,timestamp 5913 1540387,nop,nop,eol,[|tcp]> (DF)
20:32:41.626566 163.50.129.246.1045 > 163.50.129.245.2010: 
. 16449:17889(1440) ack 1 win 17280 <nop,nop,timestamp 1540387 5913,nop,nop,eol,[|tcp]> (DF)
20:32:41.626689 163.50.129.246.1045 > 163.50.129.245.2010: 
. 17889:19329(1440) ack 1 win 17280 <nop,nop,timestamp 1540387 5913,nop,nop,[|tcp]> (DF)
20:32:41.627156 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 19329 win 17280 <nop,nop,timestamp 5913 1540387,nop,nop,eol,[|tcp]> (DF)
20:32:43.125857 163.50.129.246.1045 > 163.50.129.245.2010: 
. 16449:17889(1440) ack 1 win 17280 <nop,nop,timestamp 1540389 5913,nop,nop,eol,[|tcp]> (DF)
20:32:43.125937 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 19329 win 17280 <nop,nop,timestamp 5916 1540389,nop,nop,eol,[|tcp]> (DF)
20:32:43.126125 163.50.129.246.1045 > 163.50.129.245.2010: 
. 19329:20769(1440) ack 1 win 17280 <nop,nop,timestamp 1540390 5916,nop,nop,eol,[|tcp]> (DF)
20:32:43.126248 163.50.129.246.1045 > 163.50.129.245.2010: 
. 20769:22209(1440) ack 1 win 17280 <nop,nop,timestamp 1540390 5916,nop,nop,[|tcp]> (DF)
20:32:43.126338 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 22209 win 17280 <nop,nop,timestamp 5916 1540390,nop,nop,eol,[|tcp]> (DF)
20:32:43.126524 163.50.129.246.1045 > 163.50.129.245.2010: 
. 22209:23649(1440) ack 1 win 17280 <nop,nop,timestamp 1540390 5916,nop,nop,eol,[|tcp]> (DF)
20:32:43.126648 163.50.129.246.1045 > 163.50.129.245.2010: 
. 23649:25089(1440) ack 1 win 17280 <nop,nop,timestamp 1540390 5916,nop,nop,eol,[|tcp]> (DF)
20:32:43.127114 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 25089 win 17280 <nop,nop,timestamp 5916 1540390,nop,nop,eol,[|tcp]> (DF)
20:32:44.625820 163.50.129.246.1045 > 163.50.129.245.2010: 
. 22209:23649(1440) ack 1 win 17280 <nop,nop,timestamp 1540392 5916,nop,nop,eol,[|tcp]> (DF)
20:32:44.625942 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 25089 win 17280 <nop,nop,timestamp 5919 1540392,nop,nop,eol,[|tcp]> (DF)
20:32:44.626128 163.50.129.246.1045 > 163.50.129.245.2010: 
. 25089:26529(1440) ack 1 win 17280 <nop,nop,timestamp 1540393 5919,nop,nop,eol,[|tcp]> (DF)
20:32:44.626251 163.50.129.246.1045 > 163.50.129.245.2010: 
. 26529:27969(1440) ack 1 win 17280 <nop,nop,timestamp 1540393 5919,nop,nop,[|tcp]> (DF)
20:32:44.626352 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 27969 win 17280 <nop,nop,timestamp 5919 1540393,nop,nop,eol,[|tcp]> (DF)
20:32:44.626535 163.50.129.246.1045 > 163.50.129.245.2010: 
. 27969:29409(1440) ack 1 win 17280 <nop,nop,timestamp 1540393 5919,nop,nop,eol,[|tcp]> (DF)
20:32:44.626659 163.50.129.246.1045 > 163.50.129.245.2010: 
. 29409:30849(1440) ack 1 win 17280 <nop,nop,timestamp 1540393 5919,nop,nop,[|tcp]> (DF)
20:32:44.627121 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 30849 win 17280 <nop,nop,timestamp 5919 1540393,nop,nop,eol,[|tcp]> (DF)
20:32:46.125791 163.50.129.246.1045 > 163.50.129.245.2010: 
. 27969:29409(1440) ack 1 win 17280 <nop,nop,timestamp 1540395 5919,nop,nop,eol,[|tcp]> (DF)
20:32:46.125878 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 30849 win 17280 <nop,nop,timestamp 5922 1540395,nop,nop,eol,[|tcp]> (DF)
20:32:46.126075 163.50.129.246.1045 > 163.50.129.245.2010: 
. 30849:32289(1440) ack 1 win 17280 <nop,nop,timestamp 1540396 5922,nop,nop,eol,[|tcp]> (DF)
20:32:46.126200 163.50.129.246.1045 > 163.50.129.245.2010: 
. 32289:33729(1440) ack 1 win 17280 <nop,nop,timestamp 1540396 5922,nop,nop,[|tcp]> (DF)
20:32:46.126290 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 33729 win 17280 <nop,nop,timestamp 5922 1540396,nop,nop,eol,[|tcp]> (DF)
20:32:46.126468 163.50.129.246.1045 > 163.50.129.245.2010: 
. 33729:35169(1440) ack 1 win 17280 <nop,nop,timestamp 1540396 5922,nop,nop,eol,[|tcp]> (DF)
20:32:46.126593 163.50.129.246.1045 > 163.50.129.245.2010: 
. 35169:36609(1440) ack 1 win 17280 <nop,nop,timestamp 1540396 5922,nop,nop,eol,[|tcp]> (DF)
20:32:46.127069 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 36609 win 17280 <nop,nop,timestamp 5922 1540396,nop,nop,eol,[|tcp]> (DF)
20:32:47.625745 163.50.129.246.1045 > 163.50.129.245.2010: 
. 33729:35169(1440) ack 1 win 17280 <nop,nop,timestamp 1540398 5922,nop,nop,eol,[|tcp]> (DF)
20:32:47.625846 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 36609 win 17280 <nop,nop,timestamp 5925 1540398,nop,nop,eol,[|tcp]> (DF)
20:32:47.626059 163.50.129.246.1045 > 163.50.129.245.2010: 
. 36609:38049(1440) ack 1 win 17280 <nop,nop,timestamp 1540399 5925,nop,nop,eol,[|tcp]> (DF)
20:32:47.626183 163.50.129.246.1045 > 163.50.129.245.2010: 
. 38049:39489(1440) ack 1 win 17280 <nop,nop,timestamp 1540399 5925,nop,nop,[|tcp]> (DF)
20:32:47.626274 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 39489 win 17280 <nop,nop,timestamp 5925 1540399,nop,nop,eol,[|tcp]> (DF)
20:32:47.626452 163.50.129.246.1045 > 163.50.129.245.2010: 
. 39489:40929(1440) ack 1 win 17280 <nop,nop,timestamp 1540399 5925,nop,nop,eol,[|tcp]> (DF)
20:32:47.626459 163.50.129.246.1045 > 163.50.129.245.2010: 
FP 40929:40961(32) ack 1 win 17280 <nop,nop,timestamp 1540399 5925,nop,nop,[|tcp]> (DF)
20:32:47.626540 163.50.129.245.2010 > 163.50.129.246.1045: 
. ack 40962 win 15808 <nop,nop,timestamp 5925 1540399,nop,nop,eol,[|tcp]> (DF)
20:32:47.627039 163.50.129.245.2010 > 163.50.129.246.1045: 
F 1:1(0) ack 40962 win 17280 <nop,nop,timestamp 5925 1540399,nop,nop,eol,[|tcp]> (DF)
20:32:47.627230 163.50.129.246.1045 > 163.50.129.245.2010: 
. ack 2 win 17280 <nop,nop,timestamp 1540399 5925,nop,nop,[|tcp]> (DF)
20:32:52.181889 1:10:21:4e:0:0 sap 3e > 2:0:0:0:45:0 sap 4d a3/C len=259
			 3281 f5a3 3281 f702 0802 0800 fcf7 6d02
			 0100 0000 0200 00a3 3281 0000 0000 0000
			 0000 0000 0000 0200 0200 00a3 3281 0400
			 0000 00
20:32:52.181942 163.50.129.245.520 > 163.50.129.247.520: 
rip-resp 12: 163.50.129.0(2) 95.211.3.53(-368771072)[|rip] [ttl 1]

66 packets received by filter
0 packets dropped by kernel

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Shin Abe$B!!(BE-mail:abe7shin@mbox.kyoto-inet.or.jp
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