[root@incident root]# tcpdump -n
tcpdump: listening on wlan0

[I try loading http://www.kernel.org]

22:42:40.890025 192.168.1.6.32843 > 204.152.189.116.http: S 1994994484:1994994484(0) win 5840 <mss 1460,sackOK,timestamp 4294940315 0,nop,wscale 7> (DF)
22:42:41.143063 204.152.189.116.http > 192.168.1.6.32843: S 1404108869:1404108869(0) ack 1994994485 win 5792 <mss 1452,sackOK,timestamp 3383469176 4294940315,nop,wscale 0> (DF)
22:42:41.143123 192.168.1.6.32843 > 204.152.189.116.http: . ack 1 win 45 <nop,nop,timestamp 4294940568 3383469176> (DF)
22:42:41.143362 192.168.1.6.32843 > 204.152.189.116.http: P 1:421(420) ack 1 win 45 <nop,nop,timestamp 4294940568 3383469176> (DF)
22:42:41.147669 204.152.189.116.http > 192.168.1.6.32843: S 1404108869:1404108869(0) ack 1994994485 win 5792 <mss 1452,sackOK,timestamp 3383469180 4294940315,nop,wscale 0> (DF)
22:42:41.147723 192.168.1.6.32843 > 204.152.189.116.http: . ack 1 win 45 <nop,nop,timestamp 4294940572 3383469180,nop,nop,sack sack 1 {0:1} > (DF)
22:42:41.408763 204.152.189.116.http > 192.168.1.6.32843: . ack 421 win 6432 <nop,nop,timestamp 3383469440 4294940568> (DF)

[here I press Mozilla's Stop button]

22:43:41.051537 192.168.1.6.32843 > 204.152.189.116.http: F 421:421(0) ack 1 win 45 <nop,nop,timestamp 33189 3383469440> (DF)
22:43:41.304371 204.152.189.116.http > 192.168.1.6.32843: . ack 422 win 6432 <nop,nop,timestamp 3383529343 33189,nop,nop,sack sack 1 {421:422} > (DF)

[from another window I set net.ipv4.tcp_default_win_scale=0, then
 try again loading http://www.kernel.org]

22:44:11.726049 192.168.1.6.32880 > 204.152.189.116.http: S 2084275741:2084275741(0) win 5840 <mss 1460,sackOK,timestamp 63869 0> (DF)
22:44:11.979217 204.152.189.116.http > 192.168.1.6.32880: S 1504030493:1504030493(0) ack 2084275742 win 5792 <mss 1452,sackOK,timestamp 3383560023 63869> (DF)
22:44:11.979276 192.168.1.6.32880 > 204.152.189.116.http: . ack 1 win 5840 <nop,nop,timestamp 64122 3383560023> (DF)
22:44:11.979509 192.168.1.6.32880 > 204.152.189.116.http: P 1:421(420) ack 1 win 5840 <nop,nop,timestamp 64122 3383560023> (DF)
22:44:12.248229 204.152.189.116.http > 192.168.1.6.32880: P 1441:1530(89) ack 421 win 6432 <nop,nop,timestamp 3383560291 64122> (DF)
22:44:12.248283 192.168.1.6.32880 > 204.152.189.116.http: . ack 1 win 5840 <nop,nop,timestamp 64391 3383560023,nop,nop,sack sack 1 {1441:1530} > (DF)
22:44:12.266188 204.152.189.116.http > 192.168.1.6.32880: . 1:1441(1440) ack 421 win 6432 <nop,nop,timestamp 3383560291 64122> (DF)
22:44:12.266251 192.168.1.6.32880 > 204.152.189.116.http: . ack 1530 win 8640 <nop,nop,timestamp 64409 3383560291> (DF)
22:44:12.476923 192.168.1.6.32881 > 204.152.189.116.http: S 2089635785:2089635785(0) win 5840 <mss 1460,sackOK,timestamp 64620 0> (DF)
22:44:12.516269 204.152.189.116.http > 192.168.1.6.32880: . 1530:2970(1440) ack 421 win 6432 <nop,nop,timestamp 3383560543 64391> (DF)
22:44:12.516321 192.168.1.6.32880 > 204.152.189.116.http: . ack 2970 win 11520 <nop,nop,timestamp 64659 3383560543> (DF)22:44:12.556234 204.152.189.116.http > 192.168.1.6.32880: . 2970:4410(1440) ack 421 win 6432 <nop,nop,timestamp 3383560582 64409> (DF)
22:44:12.556292 192.168.1.6.32880 > 204.152.189.116.http: . ack 4410 win 14400 <nop,nop,timestamp 64699 3383560582> (DF)22:44:12.573178 204.152.189.116.http > 192.168.1.6.32880: . 4410:5850(1440) ack 421 win 6432 <nop,nop,timestamp 3383560582 64409> (DF)
22:44:12.573230 192.168.1.6.32880 > 204.152.189.116.http: . ack 5850 win 17280 <nop,nop,timestamp 64716 3383560582> (DF)22:44:12.730166 204.152.189.116.http > 192.168.1.6.32881: S 1507798050:1507798050(0) ack 2089635786 win 5792 <mss 1452,sackOK,timestamp 3383560774 64620> (DF)
22:44:12.730225 192.168.1.6.32881 > 204.152.189.116.http: . ack 1 win 5840 <nop,nop,timestamp 64873 3383560774> (DF)
22:44:12.739300 192.168.1.6.32881 > 204.152.189.116.http: P 1:475(474) ack 1 win 5840 <nop,nop,timestamp 64882 3383560774> (DF)
22:44:12.779178 204.152.189.116.http > 192.168.1.6.32880: . 5850:7290(1440) ack 421 win 6432 <nop,nop,timestamp 3383560810 64659> (DF)
22:44:12.779231 192.168.1.6.32880 > 204.152.189.116.http: . ack 7290 win 20160 <nop,nop,timestamp 64922 3383560810> (DF)22:44:12.796556 204.152.189.116.http > 192.168.1.6.32880: . 7290:8730(1440) ack 421 win 6432 <nop,nop,timestamp 3383560810 64659> (DF)
22:44:12.796609 192.168.1.6.32880 > 204.152.189.116.http: . ack 8730 win 23040 <nop,nop,timestamp 64939 3383560810> (DF)22:44:12.823193 204.152.189.116.http > 192.168.1.6.32880: P 8730:10170(1440) ack 421 win 6432 <nop,nop,timestamp 3383560849 64699> (DF)
22:44:12.823246 192.168.1.6.32880 > 204.152.189.116.http: . ack 10170 win 25920 <nop,nop,timestamp 64966 3383560849> (DF)
22:44:12.839181 204.152.189.116.http > 192.168.1.6.32880: P 10170:11610(1440) ack 421 win 6432 <nop,nop,timestamp 3383560849 64699> (DF)
22:44:12.839235 192.168.1.6.32880 > 204.152.189.116.http: . ack 11610 win 28800 <nop,nop,timestamp 64982 3383560849> (DF)
22:44:12.863233 204.152.189.116.http > 192.168.1.6.32880: . 11610:13050(1440) ack 421 win 6432 <nop,nop,timestamp 3383560866 64716> (DF)
22:44:12.863296 192.168.1.6.32880 > 204.152.189.116.http: . ack 13050 win 31680 <nop,nop,timestamp 65006 3383560866> (DF)
22:44:12.881666 204.152.189.116.http > 192.168.1.6.32880: . 13050:14490(1440) ack 421 win 6432 <nop,nop,timestamp 3383560866 64716> (DF)
22:44:12.881715 192.168.1.6.32880 > 204.152.189.116.http: . ack 14490 win 34560 <nop,nop,timestamp 65024 3383560866> (DF)
22:44:13.001147 204.152.189.116.http > 192.168.1.6.32881: . ack 475 win 6432 <nop,nop,timestamp 3383561047 64882> (DF)
22:44:13.007322 204.152.189.116.http > 192.168.1.6.32881: P 1:294(293) ack 475 win 6432 <nop,nop,timestamp 3383561048 64882> (DF)
22:44:13.007375 192.168.1.6.32881 > 204.152.189.116.http: . ack 294 win 6432 <nop,nop,timestamp 65150 3383561048> (DF)
22:44:13.025192 204.152.189.116.http > 192.168.1.6.32881: . 294:1734(1440) ack 475 win 6432 <nop,nop,timestamp 3383561048 64882> (DF)
22:44:13.025245 192.168.1.6.32881 > 204.152.189.116.http: . ack 1734 win 8640 <nop,nop,timestamp 65168 3383561048> (DF)
22:44:13.046183 204.152.189.116.http > 192.168.1.6.32880: . 14490:15930(1440) ack 421 win 6432 <nop,nop,timestamp 3383561074 64922> (DF)
22:44:13.046243 192.168.1.6.32880 > 204.152.189.116.http: . ack 15930 win 37440 <nop,nop,timestamp 65189 3383561074> (DF)
22:44:13.064284 204.152.189.116.http > 192.168.1.6.32880: P 15930:17370(1440) ack 421 win 6432 <nop,nop,timestamp 3383561074 64922> (DF)
22:44:13.064335 192.168.1.6.32880 > 204.152.189.116.http: . ack 17370 win 40320 <nop,nop,timestamp 65207 3383561074> (DF)
22:44:13.071647 204.152.189.116.http > 192.168.1.6.32880: P 17370:18089(719) ack 421 win 6432 <nop,nop,timestamp 3383561091 64939> (DF)
22:44:13.071695 192.168.1.6.32880 > 204.152.189.116.http: . ack 18089 win 40320 <nop,nop,timestamp 65214 3383561091> (DF)
22:44:13.071965 192.168.1.6.32880 > 204.152.189.116.http: P 421:893(472) ack 18089 win 40320 <nop,nop,timestamp 65215 3383561091> (DF)
22:44:13.275153 204.152.189.116.http > 192.168.1.6.32881: . 1734:3174(1440) ack 475 win 6432 <nop,nop,timestamp 3383561302 65150> (DF)
22:44:13.275205 192.168.1.6.32881 > 204.152.189.116.http: . ack 3174 win 11520 <nop,nop,timestamp 65418 3383561302> (DF)22:44:13.289352 204.152.189.116.http > 192.168.1.6.32881: P 3174:4244(1070) ack 475 win 6432 <nop,nop,timestamp 3383561302 65150> (DF)
22:44:13.289425 192.168.1.6.32881 > 204.152.189.116.http: . ack 4244 win 14400 <nop,nop,timestamp 65432 3383561302> (DF)22:44:13.349445 204.152.189.116.http > 192.168.1.6.32880: P 18089:18556(467) ack 893 win 7504 <nop,nop,timestamp 3383561389 65215> (DF)
22:44:13.388816 192.168.1.6.32880 > 204.152.189.116.http: . ack 18556 win 40320 <nop,nop,timestamp 65532 3383561389> (DF)
 
[It worked, I interrrupt tcpdump]

57 packets received by filter
0 packets dropped by kernel