tcpdump -n -i lo0 host 127.0.0.1 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on lo0, link-type NULL (BSD loopback), capture size 65535 bytes 13:21:18.931044 IP 127.0.0.1.19750 > 127.0.0.1.80: Flags [S], seq 1314919130, win 65535, options [mss 16344,nop,wscale 6,sackOK,TS val 1045544593 ecr 0], length 0 13:21:18.931098 IP 127.0.0.1.80 > 127.0.0.1.19750: Flags [S.], seq 3925474591, ack 1314919131, win 65535, options [mss 16344,nop,wscale 6,sackOK,TS val 1631978999 ecr 1045544593], length 0 13:21:18.931108 IP 127.0.0.1.19750 > 127.0.0.1.80: Flags [.], ack 1, win 1275, options [nop,nop,TS val 1045544593 ecr 1631978999], length 0 13:21:18.931159 IP 127.0.0.1.19750 > 127.0.0.1.80: Flags [P.], seq 1:457, ack 1, win 1275, options [nop,nop,TS val 1045544593 ecr 1631978999], length 456 13:21:18.931506 IP 127.0.0.1.80 > 127.0.0.1.19750: Flags [.], seq 1:16333, ack 457, win 1275, options [nop,nop,TS val 1631978999 ecr 1045544593], length 16332 13:21:18.931521 IP 127.0.0.1.80 > 127.0.0.1.19750: Flags [.], seq 16333:32665, ack 457, win 1275, options [nop,nop,TS val 1631978999 ecr 1045544593], length 16332 13:21:18.931549 IP 127.0.0.1.19750 > 127.0.0.1.80: Flags [.], ack 32665, win 765, options [nop,nop,TS val 1045544593 ecr 1631978999], length 0 13:21:18.931555 IP 127.0.0.1.80 > 127.0.0.1.19750: Flags [P.], seq 32665:35458, ack 457, win 1275, options [nop,nop,TS val 1631978999 ecr 1045544593], length 2793 13:21:18.931665 IP 127.0.0.1.80 > 127.0.0.1.19750: Flags [F.], seq 35458, ack 457, win 1275, options [nop,nop,TS val 1631979000 ecr 1045544593], length 0 13:21:18.931682 IP 127.0.0.1.19750 > 127.0.0.1.80: Flags [.], ack 35459, win 977, options [nop,nop,TS val 1045544594 ecr 1631978999], length 0 13:21:18.931994 IP 127.0.0.1.19750 > 127.0.0.1.80: Flags [F.], seq 457, ack 35459, win 1275, options [nop,nop,TS val 1045544594 ecr 1631978999], length 0 13:21:18.932013 IP 127.0.0.1.80 > 127.0.0.1.19750: Flags [.], ack 458, win 1275, options [nop,nop,TS val 1631979000 ecr 1045544594], length 0 ^C 12 packets captured 12 packets received by filter 0 packets dropped by kernel