FTP servery a velikost MTU (was:Re: ftp.linux.cz z gprs nejede)

[Jaroslav Lukesh]

Dne pátek, 17. září 2004 13:05 jste napsal(a):
> 	Zajimave. Cili HTTP funguje i s mensim MTU pro velke stranky?

ano, ted jsem stahl ten pulmegovy /pub/du-sort.gz

> Zkuste stahnout neco co ma aspon par desitek/stovek KB pres HTTP.
> Zkuste prosim udelat tcpdump HTTP spojeni a tcpdump (pokusu o) FTP
> spojeni a podivejte se cim se lisi (napriklad v dohodnutem MSS).

Priznam se, ze mi to rika hodne malo :o) Kdyztak dekuji za podivani ;-)

tcpdump: listening on ppp0
14:11:30.494975 10.176.90.251.56228 > 147.251.48.205.ftp: S 
1632874064:1632874064(0) win 1024 <mss 256,sackOK,timestamp 43662735 
0,nop,wscale 0> (DF)
14:11:33.494082 10.176.90.251.56228 > 147.251.48.205.ftp: S 
1632874064:1632874064(0) win 1024 <mss 256,sackOK,timestamp 43663035 
0,nop,wscale 0> (DF)
14:11:34.427702 147.251.48.205.ftp > 10.176.90.251.56228: S 
3082218008:3082218008(0) ack 1632874065 win 5792 <mss 1460,sackOK,timestamp 
3209715514 43663035,nop,wscale 7> (DF)
14:11:34.427772 10.176.90.251.56228 > 147.251.48.205.ftp: . ack 1 win 1024 
<nop,nop,timestamp 43663128 3209715514> (DF)
14:11:41.958594 147.251.48.205.ftp > 10.176.90.251.56228: P 1:74(73) ack 1 win 
46 <nop,nop,timestamp 3209722206 43663128> (DF)
14:11:41.958793 10.176.90.251.56228 > 147.251.48.205.ftp: . ack 74 win 1024 
<nop,nop,timestamp 43663881 3209722206> (DF) [tos 0x10]
14:11:41.959033 10.176.90.251.56228 > 147.251.48.205.ftp: P 1:14(13) ack 74 
win 1024 <nop,nop,timestamp 43663881 3209722206> (DF) [tos 0x10]
14:11:42.622575 147.251.48.205.ftp > 10.176.90.251.56228: . ack 14 win 46 
<nop,nop,timestamp 3209723704 43663881> (DF)
14:11:42.653585 147.251.48.205.ftp > 10.176.90.251.56228: P 74:99(25) ack 14 
win 46 <nop,nop,timestamp 3209723705 43663881> (DF)
14:11:42.653801 10.176.90.251.56228 > 147.251.48.205.ftp: P 14:32(18) ack 99 
win 1024 <nop,nop,timestamp 43663950 3209723705> (DF) [tos 0x10]
14:11:43.291570 147.251.48.205.ftp > 10.176.90.251.56228: P 99:124(25) ack 32 
win 46 <nop,nop,timestamp 3209724367 43663950> (DF)
14:11:43.324080 10.176.90.251.56228 > 147.251.48.205.ftp: . ack 124 win 1024 
<nop,nop,timestamp 43664018 3209724367> (DF) [tos 0x10]
14:11:48.041437 10.176.90.251.56228 > 147.251.48.205.ftp: P 32:48(16) ack 124 
win 1024 <nop,nop,timestamp 43664489 3209724367> (DF) [tos 0x10]
14:11:49.275494 147.251.48.205.ftp > 10.176.90.251.56228: P 124:200(76) ack 48 
win 46 <nop,nop,timestamp 3209730315 43664489> (DF)
14:11:49.275662 10.176.90.251.56228 > 147.251.48.205.ftp: . ack 200 win 1024 
<nop,nop,timestamp 43664613 3209730315> (DF) [tos 0x10]
14:11:53.172775 10.176.90.251.56228 > 147.251.48.205.ftp: P 48:63(15) ack 200 
win 1024 <nop,nop,timestamp 43665002 3209730315> (DF) [tos 0x10]
14:11:54.179413 147.251.48.205.ftp > 10.176.90.251.56228: P 200:244(44) ack 63 
win 46 <nop,nop,timestamp 3209735276 43665002> (DF)
14:11:54.179572 10.176.90.251.56228 > 147.251.48.205.ftp: . ack 244 win 1024 
<nop,nop,timestamp 43665103 3209735276> (DF) [tos 0x10]
14:11:54.232399 147.251.48.205.ftp > 10.176.90.251.56228: P 244:247(3) ack 63 
win 46 <nop,nop,timestamp 3209735276 43665002> (DF)
14:11:54.232550 10.176.90.251.56228 > 147.251.48.205.ftp: . ack 247 win 1024 
<nop,nop,timestamp 43665108 3209735276> (DF) [tos 0x10]
14:11:55.018386 147.251.48.205.ftp > 10.176.90.251.56228: R 
3082218255:3082218255(0) win 0 (DF)




14:12:24.581878 10.176.90.251.56235 > 147.251.48.205.http: S 
1701855639:1701855639(0) win 1024 <mss 256,sackOK,timestamp 43668143 
0,nop,wscale 0> (DF)
14:12:26.592904 147.251.48.205.http > 10.176.90.251.56235: S 
3140890779:3140890779(0) ack 1701855640 win 5792 <mss 1460,sackOK,timestamp 
3209767487 43668143,nop,wscale 7> (DF)
14:12:26.592955 10.176.90.251.56235 > 147.251.48.205.http: . ack 1 win 1024 
<nop,nop,timestamp 43668344 3209767487> (DF)
14:12:26.593572 10.176.90.251.56235 > 147.251.48.205.http: . 1:233(232) ack 1 
win 1024 <nop,nop,timestamp 43668344 3209767487> (DF)
14:12:26.593604 10.176.90.251.56235 > 147.251.48.205.http: P 233:316(83) ack 1 
win 1024 <nop,nop,timestamp 43668344 3209767487> (DF)
14:12:27.667527 147.251.48.205.http > 10.176.90.251.56235: . ack 233 win 50 
<nop,nop,timestamp 3209768747 43668344> (DF)
14:12:27.756894 147.251.48.205.http > 10.176.90.251.56235: . ack 316 win 50 
<nop,nop,timestamp 3209768846 43668344> (DF)
14:12:27.874915 147.251.48.205.http > 10.176.90.251.56235: . 1:245(244) ack 
316 win 50 <nop,nop,timestamp 3209768847 43668344> (DF)
14:12:27.874957 10.176.90.251.56235 > 147.251.48.205.http: . ack 245 win 1464 
<nop,nop,timestamp 43668473 3209768847> (DF)
14:12:27.980901 147.251.48.205.http > 10.176.90.251.56235: . 245:489(244) ack 
316 win 50 <nop,nop,timestamp 3209768847 43668344> (DF)
14:12:27.980949 10.176.90.251.56235 > 147.251.48.205.http: . ack 489 win 1952 
<nop,nop,timestamp 43668483 3209768847> (DF)
14:12:28.700891 147.251.48.205.http > 10.176.90.251.56235: P 489:733(244) ack 
316 win 50 <nop,nop,timestamp 3209769706 43668473> (DF)
14:12:28.701053 10.176.90.251.56235 > 147.251.48.205.http: . ack 733 win 2440 
<nop,nop,timestamp 43668555 3209769706> (DF)
14:12:28.786896 147.251.48.205.http > 10.176.90.251.56235: . 733:977(244) ack 
316 win 50 <nop,nop,timestamp 3209769706 43668473> (DF)
14:12:28.787068 10.176.90.251.56235 > 147.251.48.205.http: . ack 977 win 2928 
<nop,nop,timestamp 43668564 3209769706> (DF)
14:12:28.814889 147.251.48.205.http > 10.176.90.251.56235: P 977:1096(119) ack 
316 win 50 <nop,nop,timestamp 3209769746 43668483> (DF)
14:12:28.815495 10.176.90.251.56235 > 147.251.48.205.http: . ack 1096 win 2928 
<nop,nop,timestamp 43668567 3209769746> (DF)
14:12:44.319633 147.251.48.205.http > 10.176.90.251.56235: F 1096:1096(0) ack 
316 win 50 <nop,nop,timestamp 3209783848 43668567> (DF)
14:12:44.364092 10.176.90.251.56235 > 147.251.48.205.http: . ack 1097 win 2928 
<nop,nop,timestamp 43670122 3209783848> (DF)
14:12:44.814414 10.176.90.251.56235 > 147.251.48.205.http: F 316:316(0) ack 
1097 win 2928 <nop,nop,timestamp 43670167 3209783848> (DF)
14:12:45.647612 147.251.48.205.http > 10.176.90.251.56235: . ack 317 win 50 
<nop,nop,timestamp 3209786726 43670167> (DF)


-- 

                        Jaroslav Lukesh
  -------------------------------------------------------------
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