标题：[相当有用]tcpdump 通过ip看端口之Linux下用tcpdump查看某进程请求某个IP的端口情况。
出处：向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
时间：Fri, 19 Aug 2016 15:17:31 +0000
作者：jackxiang
地址：http://jackxiang.com/post/8900/

内容：
杨永(杨永) 08-19 15:14:56
tcpdump -vnn host  要挂载服务器的IP
杨永(杨永) 08-19 15:15:07
tcpdump -vnn host 192.168.151.201
杨永(杨永) 08-19 15:17:01
看情况得开下4046端口
杨永(杨永) 08-19 15:17:12
发给张腾让他开下
杨永(杨永) 08-19 15:18:02
10.71.182.97.55818 > 192.168.151.201.4046
卡在这了
杨永(杨永) 08-19 15:18:09
访问4046端口没权限 （ength 0）
    10.71.182.97.37218 > 192.168.151.201.4046: Flags [S], cksum 0xf506 (correct), seq 2144183597, win 14600, options [mss 1460,sackOK,TS val 1372580057 ecr 0,nop,wscale 9], length 0
——————————————————————————————————————————————
   10.71.182.97.48860 > 192.168.151.201.111: Flags [F.], cksum 0x0a06 (correct), seq 61, ack 33, win 29, options [nop,nop,TS val 1372580057 ecr 798553157], length 0
15:16:24.794577 IP (tos 0x0, ttl 64, id 19956, offset 0, flags [DF], proto TCP (6), length 60)
    10.71.182.97.37218 > 192.168.151.201.4046: Flags [S], cksum 0xf506 (correct), seq 2144183597, win 14600, options [mss 1460,sackOK,TS val 1372580057 ecr 0,nop,wscale 9], length 0
15:16:24.795999 IP (tos 0x0, ttl 57, id 8451, offset 0, flags [DF], proto TCP (6), length 52)
    192.168.151.201.111 > 10.71.182.97.48860: Flags [.], cksum 0xe7ea (correct), ack 62, win 8760, options [nop,nop,TS val 798553157 ecr 1372580057], length 0
15:16:24.796009 IP (tos 0x0, ttl 57, id 8707, offset 0, flags [DF], proto TCP (6), length 52)
    192.168.151.201.111 > 10.71.182.97.48860: Flags [F.], cksum 0xe7e9 (correct), seq 33, ack 62, win 8760, options [nop,nop,TS val 798553157 ecr 1372580057], length 0
15:16:24.796014 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 52)
    10.71.182.97.48860 > 192.168.151.201.111: Flags [.], cksum 0x0a04 (correct), ack 34, win 29, options [nop,nop,TS val 1372580058 ecr 798553157], length 0
15:16:25.794390 IP (tos 0x0, ttl 64, id 19957, offset 0, flags [DF], proto TCP (6), length 60)
    10.71.182.97.37218 > 192.168.151.201.4046: Flags [S], cksum 0xf11e (correct), seq 2144183597, win 14600, options [mss 1460,sackOK,TS val 1372581057 ecr 0,nop,wscale 9], length 0
15:16:27.794397 IP (tos 0x0, ttl 64, id 19958, offset 0, flags [DF], proto TCP (6), length 60)
    10.71.182.97.37218 > 192.168.151.201.4046: Flags [S], cksum 0xe94e (correct), seq 2144183597, win 14600, options [mss 1460,sackOK,TS val 1372583057 ecr 0,nop,wscale 9], length 0


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