Here you go, two sessions, one with win set in Syn/Ack packet and other
with separate "windows open" Ack packet.
16:59:47.629750 IP (tos 0x0, ttl 123, id 55648, offset 0, flags [DF],
proto TCP (6), length 48)
195.64.148.12.61153 > 193.178.147.113.80: Flags [S], cksum 0x5721
(correct), seq 770400880, win 65535, options [mss 1460,nop,nop,sackOK],
length 0
16:59:47.629774 IP (tos 0x0, ttl 254, id 43755, offset 0, flags [DF],
proto TCP (6), length 48)
193.178.147.113.80 > 195.64.148.12.61153: Flags [S.], cksum 0xeaa3
(correct), seq 2323563246, ack 770400881, win 8192, options [mss
1460,sackOK,eol], length 0
16:59:47.631873 IP (tos 0x0, ttl 123, id 40733, offset 0, flags [DF],
proto TCP (6), length 40)
195.64.148.12.61153 > 193.178.147.113.80: Flags [.], cksum 0x3667
(correct), ack 2323563247, win 65535, length 0
16:59:47.633613 IP (tos 0x0, ttl 123, id 36942, offset 0, flags [DF],
proto TCP (6), length 840)
195.64.148.12.61153 > 193.178.147.113.80: Flags [P.], cksum 0xcfb6
(correct), seq 770400881:770401681, ack 2323563247, win 65535, length 800
16:59:47.633710 IP (tos 0x0, ttl 254, id 22412, offset 0, flags [DF],
proto TCP (6), length 1500)
193.178.147.113.80 > 195.64.148.12.61153: Flags [.], seq
2323563247:2323564707, ack 770401681, win 8760, length 1460
16:59:47.633721 IP (tos 0x0, ttl 254, id 22395, offset 0, flags [DF],
proto TCP (6), length 340)
193.178.147.113.80 > 195.64.148.12.61153: Flags [P.], cksum 0x8323
(correct), seq 2323564707:2323565007, ack 770401681, win 8760, length 300
16:59:47.633745 IP (tos 0x0, ttl 254, id 17184, offset 0, flags [DF],
proto TCP (6), length 40)
193.178.147.113.80 > 195.64.148.12.61153: Flags [F.], cksum 0x0a2e
(correct), seq 2323565007, ack 770401681, win 8760, length 0
16:59:47.636215 IP (tos 0x0, ttl 123, id 65415, offset 0, flags [DF],
proto TCP (6), length 40)
195.64.148.12.61153 > 193.178.147.113.80: Flags [.], cksum 0x2c67
(correct), ack 2323565007, win 65535, length 0
16:59:47.636607 IP (tos 0x0, ttl 123, id 48103, offset 0, flags [DF],
proto TCP (6), length 40)
195.64.148.12.61153 > 193.178.147.113.80: Flags [.], cksum 0x2c66
(correct), ack 2323565008, win 65535, length 0
16:59:47.636841 IP (tos 0x0, ttl 123, id 39732, offset 0, flags [DF],
proto TCP (6), length 40)
195.64.148.12.61153 > 193.178.147.113.80: Flags [F.], cksum 0x2c65
(correct), seq 770401681, ack 2323565008, win 65535, length 0
16:59:47.636855 IP (tos 0x0, ttl 254, id 37717, offset 0, flags [DF],
proto TCP (6), length 40)
193.178.147.113.80 > 195.64.148.12.61153: Flags [.], cksum 0x0a2e
(correct), ack 770401682, win 8759, length 0
17:01:58.437891 IP (tos 0x0, ttl 121, id 23760, offset 0, flags [DF],
proto TCP (6), length 48)
92.231.64.37.61153 > 193.178.147.113.80: Flags [S], cksum 0x5c46
(correct), seq 3652856772, win 16384, options [mss 1452,nop,nop,sackOK],
length 0
17:01:58.437907 IP (tos 0x10, ttl 254, id 61730, offset 0, flags [DF],
proto TCP (6), length 44)
193.178.147.113.80 > 92.231.64.37.61153: Flags [S.], cksum 0x2c06
(correct), seq 3164719252, ack 3652856773, win 0, options [mss 1452],
length 0
17:01:58.514354 IP (tos 0x0, ttl 121, id 23780, offset 0, flags [DF],
proto TCP (6), length 40)
92.231.64.37.61153 > 193.178.147.113.80: Flags [.], cksum 0xffaa
(correct), ack 3164719253, win 17424, length 0
17:01:58.514412 IP (tos 0x10, ttl 254, id 17560, offset 0, flags [DF],
proto TCP (6), length 40)
193.178.147.113.80 > 92.231.64.37.61153: Flags [.], cksum 0x23bb
(correct), ack 3652856773, win 8192, length 0
17:01:58.605052 IP (tos 0x0, ttl 121, id 23789, offset 0, flags [DF],
proto TCP (6), length 690)
92.231.64.37.61153 > 193.178.147.113.80: Flags [P.], cksum 0x6b1c
(correct), seq 3652856773:3652857423, ack 3164719253, win 17424, length 650
17:01:58.605123 IP (tos 0x0, ttl 254, id 54275, offset 0, flags [DF],
proto TCP (6), length 1492)
193.178.147.113.80 > 92.231.64.37.61153: Flags [.], seq
3164719253:3164720705, ack 3652857423, win 8712, length 1452
17:01:58.605142 IP (tos 0x0, ttl 254, id 28400, offset 0, flags [DF],
proto TCP (6), length 346)
193.178.147.113.80 > 92.231.64.37.61153: Flags [P.], cksum 0x6b55
(correct), seq 3164720705:3164721011, ack 3652857423, win 8712, length 306
17:01:58.605162 IP (tos 0x0, ttl 254, id 4658, offset 0, flags [DF],
proto TCP (6), length 40)
193.178.147.113.80 > 92.231.64.37.61153: Flags [F.], cksum 0x184a
(correct), seq 3164721011, ack 3652857423, win 8712, length 0
17:01:58.678888 IP (tos 0x0, ttl 121, id 23803, offset 0, flags [DF],
proto TCP (6), length 40)
92.231.64.37.61153 > 193.178.147.113.80: Flags [.], cksum 0xf642
(correct), ack 3164721011, win 17424, length 0
17:01:58.680737 IP (tos 0x0, ttl 121, id 23804, offset 0, flags [DF],
proto TCP (6), length 40)
92.231.64.37.61153 > 193.178.147.113.80: Flags [.], cksum 0xf641
(correct), ack 3164721012, win 17424, length 0
17:01:58.682290 IP (tos 0x0, ttl 121, id 23806, offset 0, flags [DF],
proto TCP (6), length 40)
92.231.64.37.61153 > 193.178.147.113.80: Flags [F.], cksum 0xf640
(correct), seq 3652857423, ack 3164721012, win 17424, length 0
17:01:58.682314 IP (tos 0x0, ttl 254, id 64325, offset 0, flags [DF],
proto TCP (6), length 40)
193.178.147.113.80 > 92.231.64.37.61153: Flags [.], cksum 0x184a
(correct), ack 3652857424, win 8711, length 0
> sysctl net.inet.tcp
net.inet.tcp.rfc1323: 1
net.inet.tcp.mssdflt: 1460
net.inet.tcp.keepidle: 7200000
net.inet.tcp.keepintvl: 75000
net.inet.tcp.sendspace: 16384
net.inet.tcp.recvspace: 8192
net.inet.tcp.keepinit: 75000
net.inet.tcp.delacktime: 100
net.inet.tcp.v6mssdflt: 1220
net.inet.tcp.cc.available: newreno
net.inet.tcp.cc.algorithm: newreno
net.inet.tcp.hostcache.purge: 0
net.inet.tcp.hostcache.prune: 300
net.inet.tcp.hostcache.expire: 3600
net.inet.tcp.hostcache.count: 519
net.inet.tcp.hostcache.bucketlimit: 30
net.inet.tcp.hostcache.hashsize: 512
net.inet.tcp.hostcache.cachelimit: 15360
net.inet.tcp.recvbuf_max: 2097152
net.inet.tcp.recvbuf_inc: 16384
net.inet.tcp.recvbuf_auto: 0
net.inet.tcp.insecure_rst: 0
net.inet.tcp.ecn.maxretries: 1
net.inet.tcp.ecn.enable: 0
net.inet.tcp.abc_l_var: 2
net.inet.tcp.rfc3465: 1
net.inet.tcp.rfc3390: 1
net.inet.tcp.rfc3042: 1
net.inet.tcp.drop_synfin: 0
net.inet.tcp.delayed_ack: 1
net.inet.tcp.blackhole: 0
net.inet.tcp.log_in_vain: 0
net.inet.tcp.sendbuf_max: 65536
net.inet.tcp.sendbuf_inc: 8192
net.inet.tcp.sendbuf_auto: 0
net.inet.tcp.tso: 1
net.inet.tcp.local_slowstart_flightsize: 4
net.inet.tcp.slowstart_flightsize: 1
net.inet.tcp.path_mtu_discovery: 1
net.inet.tcp.reass.overflows: 0
net.inet.tcp.reass.cursegments: 0
net.inet.tcp.reass.maxsegments: 12852
net.inet.tcp.sack.globalholes: 0
net.inet.tcp.sack.globalmaxholes: 65536
net.inet.tcp.sack.maxholes: 128
net.inet.tcp.sack.enable: 1
net.inet.tcp.soreceive_stream: 0
net.inet.tcp.isn_reseed_interval: 0
net.inet.tcp.icmp_may_rst: 1
net.inet.tcp.pcbcount: 157
net.inet.tcp.do_tcpdrain: 1
net.inet.tcp.tcbhashsize: 8192
net.inet.tcp.log_debug: 0
net.inet.tcp.minmss: 216
net.inet.tcp.syncache.rst_on_sock_fail: 1
net.inet.tcp.syncache.rexmtlimit: 3
net.inet.tcp.syncache.hashsize: 1024
net.inet.tcp.syncache.count: 0
net.inet.tcp.syncache.cachelimit: 102400
net.inet.tcp.syncache.bucketlimit: 100
net.inet.tcp.syncookies_only: 0
net.inet.tcp.syncookies: 1
net.inet.tcp.timer_race: 0
net.inet.tcp.per_cpu_timers: 0
net.inet.tcp.finwait2_timeout: 60000
net.inet.tcp.fast_finwait2_recycle: 0
net.inet.tcp.always_keepalive: 1
net.inet.tcp.rexmit_slop: 200
net.inet.tcp.rexmit_min: 30
net.inet.tcp.msl: 30000
net.inet.tcp.nolocaltimewait: 0
net.inet.tcp.maxtcptw: 102400
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