Date: Mon, 5 Apr 2021 12:44:50 +0300 From: Rozhuk Ivan <rozhuk.im@gmail.com> To: freebsd-current@freebsd.org, "freebsd-net" <freebsd-net@freebsd.org>, Rozhuk Ivan <Rozhuk.IM@gmail.com> Subject: TCP Connection hang - MSS again Message-ID: <20210405124450.7505b43c@rimwks.local>
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Hi! TCP Connection hang then I try to open https://online.sberbank.ru/CSAFront/index.do#/ FreeBSD 13 desktop + FreeBSD 13 router (pf). http://www.netlab.linkpc.net/download/software/os_cfg/FBSD/13/base/etc/sysctl.conf FreeBSD 13 desktop have no known problems with other websites. Only with one remonte FreeBSD 12 with same sysctl.conf and mtu 9k. If I set mtu to 1500 on desktop - issue is gone. Router pf.conf contain: scrub out on $ext_v4_if0 all random-id min-ttl 128 max-mss 1400 scrub in on $ext_v4_if0 all max-mss 1400 Android 9 and FreeBSD 12.2 have no this issue (both @WiFi). As I understand, in some cases remote host does not reply with MSS option, and host behind router continue use mss 8960, that dropped by router. (pf scrub rules disabled for this log), tcpdump | grep mss: 176.99.179.102.60903 > 194.54.14.131.443: Flags [S], cksum 0xd0a2 (correct), seq 3696980106, win 65535, options [mss 8960,nop,wscale 10,sackOK,TS val 3763275954 ecr 0], length 0 176.99.179.102.60719 > 194.54.14.131.443: Flags [S], cksum 0xd796 (correct), seq 232307963, win 65535, options [mss 8960,nop,wscale 10,sackOK,TS val 1963519951 ecr 0], length 0 176.99.179.102.50146 > 194.54.14.131.443: Flags [S], cksum 0x1aa9 (correct), seq 3968469659, win 65535, options [mss 8960,nop,wscale 10,sackOK,TS val 3417199378 ecr 0], length 0 176.99.179.102.50646 > 194.54.14.131.443: Flags [S], cksum 0xb3ba (correct), seq 3774081696, win 65535, options [mss 8960,nop,wscale 10,sackOK,TS val 1089629786 ecr 0], length 0 176.99.179.102.56843 > 194.54.14.131.443: Flags [S], cksum 0xc4dd (correct), seq 647662718, win 65535, options [mss 8960,nop,wscale 10,sackOK,TS val 4054756545 ecr 0], length 0 194.54.14.131.443 > 176.99.179.102.56843: Flags [S.], cksum 0x35dd (correct), seq 186241788, ack 647662719, win 65535, options [mss 1380,nop,wscale 3,nop,nop,sackOK,nop,nop,TS val 2541298941 ecr 4054756545], length 0 176.99.179.102.65364 > 194.54.14.131.443: Flags [S], cksum 0x17a0 (correct), seq 1603248650, win 65535, options [mss 8960,nop,wscale 10,sackOK,TS val 1794142451 ecr 0], length 0 176.99.179.102.59862 > 194.54.14.131.443: Flags [S], cksum 0x2736 (correct), seq 4000339086, win 65535, options [mss 8960,nop,wscale 10,sackOK,TS val 4084903147 ecr 0], length 0 176.99.179.102.60915 > 194.54.14.131.443: Flags [S], cksum 0xd964 (correct), seq 95236311, win 65535, options [mss 8960,nop,wscale 10,sackOK,TS val 1297197380 ecr 0], length 0 176.99.179.102.58717 > 194.54.14.131.443: Flags [S], cksum 0xf92e (correct), seq 1785704794, win 65535, options [mss 8960,nop,wscale 10,sackOK,TS val 1392944917 ecr 0], length 0 194.54.14.131.443 > 176.99.179.102.58717: Flags [S.], cksum 0xe020 (correct), seq 2800465814, ack 1785704795, win 65535, options [mss 1380,nop,wscale 3,nop,nop,sackOK,nop,nop,TS val 2541366941 ecr 1392944917], length 0 176.99.179.102.53377 > 194.54.14.131.443: Flags [S], cksum 0x8fdd (correct), seq 3235103847, win 65535, options [mss 8960,nop,wscale 10,sackOK,TS val 1359134165 ecr 0], length 0 Is it possible to force FreeBSD always ask with tcp mss option? Is any other other options to work around this? Full connections log: 12:06:44.205766 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 74: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 60) 176.99.179.102.54064 > 194.54.14.131.443: Flags [S], cksum 0xca3f (correct), seq 980200339, win 65535, options [mss 1400,nop,wscale 10,sackOK,TS val 1268859625 ecr 0], length 0 12:06:44.206997 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 59, id 57535, offset 0, flags [none], proto TCP (6), length 40) 194.54.14.131.443 > 176.99.179.102.54064: Flags [S.], cksum 0x5d05 (correct), seq 2754330417, ack 980200340, win 0, length 0 12:06:44.207126 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [.], cksum 0x5d06 (correct), seq 1, ack 1, win 65535, length 0 12:06:44.210824 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 59, id 45037, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x5d06 (correct), seq 1, ack 1, win 65535, length 0 12:06:44.211130 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 571: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 557) 176.99.179.102.54064 > 194.54.14.131.443: Flags [P.], cksum 0x7667 (correct), seq 1:518, ack 1, win 65535, length 517 12:06:44.214366 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 53, id 45320, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x5d06 (correct), seq 1, ack 518, win 65018, length 0 12:06:44.216025 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 1078: (tos 0x0, ttl 53, id 45321, offset 0, flags [DF], proto TCP (6), length 1064) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x7c79 (correct), seq 1:1025, ack 518, win 65018, length 1024 12:06:44.216109 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 1078: (tos 0x0, ttl 53, id 45322, offset 0, flags [DF], proto TCP (6), length 1064) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x2c23 (correct), seq 1025:2049, ack 518, win 65018, length 1024 12:06:44.216207 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 1078: (tos 0x0, ttl 53, id 45323, offset 0, flags [DF], proto TCP (6), length 1064) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x3633 (correct), seq 2049:3073, ack 518, win 65018, length 1024 12:06:44.216220 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [.], cksum 0x5301 (correct), seq 518, ack 2049, win 65535, length 0 12:06:44.216312 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 1078: (tos 0x0, ttl 53, id 45324, offset 0, flags [DF], proto TCP (6), length 1064) 194.54.14.131.443 > 176.99.179.102.54064: Flags [P.], cksum 0xa2d7 (correct), seq 3073:4097, ack 518, win 65018, length 1024 12:06:44.216315 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 308: (tos 0x0, ttl 53, id 45325, offset 0, flags [DF], proto TCP (6), length 294) 194.54.14.131.443 > 176.99.179.102.54064: Flags [P.], cksum 0xee3e (correct), seq 4097:4351, ack 518, win 65018, length 254 12:06:44.216429 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [.], cksum 0x4b01 (correct), seq 518, ack 4097, win 65535, length 0 12:06:44.218606 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 180: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 166) 176.99.179.102.54064 > 194.54.14.131.443: Flags [P.], cksum 0x9a34 (correct), seq 518:644, ack 4351, win 65535, length 126 12:06:44.221796 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 53, id 45326, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x4c08 (correct), seq 4351, ack 644, win 64892, length 0 12:06:44.222418 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 105: (tos 0x0, ttl 53, id 45327, offset 0, flags [DF], proto TCP (6), length 91) 194.54.14.131.443 > 176.99.179.102.54064: Flags [P.], cksum 0xc06a (correct), seq 4351:4402, ack 644, win 64892, length 51 12:06:44.232616 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [.], cksum 0x3b93 (correct), seq 4163, ack 4402, win 65535, length 0 12:06:54.222862 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [.], cksum 0x4953 (correct), seq 643, ack 4402, win 65535, length 0 12:06:54.226087 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 53, id 63692, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x4bd5 (correct), seq 4402, ack 644, win 64892, length 0 12:07:09.229361 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [.], cksum 0x4953 (correct), seq 643, ack 4402, win 65535, length 0 12:07:09.232522 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 53, id 23671, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x4bd5 (correct), seq 4402, ack 644, win 64892, length 0 12:07:19.236480 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [.], cksum 0x4953 (correct), seq 643, ack 4402, win 65535, length 0 12:07:19.239595 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 53, id 38859, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x4bd5 (correct), seq 4402, ack 644, win 64892, length 0 12:07:29.245054 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [.], cksum 0x4953 (correct), seq 643, ack 4402, win 65535, length 0 12:07:29.248105 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 53, id 57047, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x4bd5 (correct), seq 4402, ack 644, win 64892, length 0 12:07:39.255329 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [.], cksum 0x4953 (correct), seq 643, ack 4402, win 65535, length 0 12:07:39.259131 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 53, id 9053, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x4bd5 (correct), seq 4402, ack 644, win 64892, length 0 12:07:49.260393 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [.], cksum 0x4953 (correct), seq 643, ack 4402, win 65535, length 0 12:07:49.263502 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 53, id 23797, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x4bd5 (correct), seq 4402, ack 644, win 64892, length 0 12:07:59.272445 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [.], cksum 0x4953 (correct), seq 643, ack 4402, win 65535, length 0 12:07:59.275522 78:da:6e:28:c9:c0 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 53, id 39984, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 176.99.179.102.54064: Flags [.], cksum 0x4bd5 (correct), seq 4402, ack 644, win 64892, length 0 12:08:03.643990 70:85:c2:43:67:5b > 78:da:6e:28:c9:c0, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 176.99.179.102.54064 > 194.54.14.131.443: Flags [R.], cksum 0x3b8f (correct), seq 4163, ack 4402, win 0, length 0 On lan: 12:19:58.237255 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 74: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 60) 172.16.0.3.6890 > 194.54.14.131.443: Flags [S], cksum 0x6428 (correct), seq 1450364111, win 65535, options [mss 8960,nop,wscale 10,sackOK,TS val 4221439542 ecr 0], length 0 12:19:58.238404 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 58, id 2055, offset 0, flags [none], proto TCP (6), length 40) 194.54.14.131.443 > 172.16.0.3.6890: Flags [S.], cksum 0x2779 (correct), seq 3562010452, ack 1450364112, win 0, length 0 12:19:58.238460 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 172.16.0.3.6890 > 194.54.14.131.443: Flags [.], cksum 0x277a (correct), seq 1, ack 1, win 65535, length 0 12:19:58.242210 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 58, id 59736, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0x277a (correct), seq 1, ack 1, win 65535, length 0 12:19:58.242320 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 571: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 557) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0x927e (correct), seq 1:518, ack 1, win 65535, length 517 12:19:58.245317 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 52, id 31249, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0x277a (correct), seq 1, ack 518, win 65018, length 0 12:19:58.246908 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 1078: (tos 0x0, ttl 52, id 31250, offset 0, flags [DF], proto TCP (6), length 1064) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0x35ac (correct), seq 1:1025, ack 518, win 65018, length 1024 12:19:58.246998 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 1078: (tos 0x0, ttl 52, id 31251, offset 0, flags [DF], proto TCP (6), length 1064) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0xf696 (correct), seq 1025:2049, ack 518, win 65018, length 1024 12:19:58.247088 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 172.16.0.3.6890 > 194.54.14.131.443: Flags [.], cksum 0x1d75 (correct), seq 518, ack 2049, win 65535, length 0 12:19:58.247092 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 1078: (tos 0x0, ttl 52, id 31252, offset 0, flags [DF], proto TCP (6), length 1064) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0x00a7 (correct), seq 2049:3073, ack 518, win 65018, length 1024 12:19:58.247161 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 1078: (tos 0x0, ttl 52, id 31253, offset 0, flags [DF], proto TCP (6), length 1064) 194.54.14.131.443 > 172.16.0.3.6890: Flags [P.], cksum 0xefb1 (correct), seq 3073:4097, ack 518, win 65018, length 1024 12:19:58.247191 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 308: (tos 0x0, ttl 52, id 31254, offset 0, flags [DF], proto TCP (6), length 294) 194.54.14.131.443 > 172.16.0.3.6890: Flags [P.], cksum 0xf9d5 (correct), seq 4097:4351, ack 518, win 65018, length 254 12:19:58.247256 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 172.16.0.3.6890 > 194.54.14.131.443: Flags [.], cksum 0x1575 (correct), seq 518, ack 4097, win 65535, length 0 12:19:58.249623 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 180: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 166) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xe897 (correct), seq 518:644, ack 4351, win 65535, length 126 12:19:58.251076 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde33 (correct), seq 644:4163, ack 4351, win 65535, length 3519 12:19:58.252582 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 52, id 31255, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0x167c (correct), seq 4351, ack 644, win 64892, length 0 12:19:58.253245 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 105: (tos 0x0, ttl 52, id 31256, offset 0, flags [DF], proto TCP (6), length 91) 194.54.14.131.443 > 172.16.0.3.6890: Flags [P.], cksum 0xb7e8 (correct), seq 4351:4402, ack 644, win 64892, length 51 12:19:58.263513 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 172.16.0.3.6890 > 194.54.14.131.443: Flags [.], cksum 0x0607 (correct), seq 4163, ack 4402, win 65535, length 0 12:19:58.581446 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:19:59.049194 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:19:59.768280 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:20:01.004359 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:20:03.268259 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:20:07.596005 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:20:08.253855 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 172.16.0.3.6890 > 194.54.14.131.443: Flags [.], cksum 0x13c7 (correct), seq 643, ack 4402, win 65535, length 0 12:20:08.256975 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 52, id 48760, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0x1649 (correct), seq 4402, ack 644, win 64892, length 0 12:20:16.064202 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:20:18.260096 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 172.16.0.3.6890 > 194.54.14.131.443: Flags [.], cksum 0x13c7 (correct), seq 643, ack 4402, win 65535, length 0 12:20:18.263312 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 52, id 3861, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0x1649 (correct), seq 4402, ack 644, win 64892, length 0 12:20:28.264898 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 172.16.0.3.6890 > 194.54.14.131.443: Flags [.], cksum 0x13c7 (correct), seq 643, ack 4402, win 65535, length 0 12:20:28.268240 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 52, id 20944, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0x1649 (correct), seq 4402, ack 644, win 64892, length 0 12:20:32.784190 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:20:38.268181 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 172.16.0.3.6890 > 194.54.14.131.443: Flags [.], cksum 0x13c7 (correct), seq 643, ack 4402, win 65535, length 0 12:20:38.271373 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 52, id 38465, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0x1649 (correct), seq 4402, ack 644, win 64892, length 0 12:20:48.275277 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 172.16.0.3.6890 > 194.54.14.131.443: Flags [.], cksum 0x13c7 (correct), seq 643, ack 4402, win 65535, length 0 12:20:48.279208 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 52, id 56414, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0x1649 (correct), seq 4402, ack 644, win 64892, length 0 12:20:58.287132 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 40) 172.16.0.3.6890 > 194.54.14.131.443: Flags [.], cksum 0x13c7 (correct), seq 643, ack 4402, win 65535, length 0 12:20:58.290278 70:85:c2:43:67:5b > 70:85:c2:37:57:22, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 52, id 10709, offset 0, flags [DF], proto TCP (6), length 40) 194.54.14.131.443 > 172.16.0.3.6890: Flags [.], cksum 0x1649 (correct), seq 4402, ack 644, win 64892, length 0 12:20:58.290453 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:21:31.555198 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:22:35.565122 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:23:39.568298 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 12:24:43.568318 70:85:c2:37:57:22 > 70:85:c2:43:67:5b, ethertype IPv4 (0x0800), length 3573: (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto TCP (6), length 3559) 172.16.0.3.6890 > 194.54.14.131.443: Flags [P.], cksum 0xde00 (correct), seq 644:4163, ack 4402, win 65535, length 3519 ...
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