1、日間外圍平臺有個交易需要通過走socket，通過報文形式往我平臺發送資訊，以前這部分交易是正常的。
現根據業務需要，把我平臺的18服務器遷移到了145機器上，導致外圍平臺的報文無法發送到我平臺，導致交易失敗。
后通過抓包工具在我平臺作了監測：
tcpdump tcp port 10003 --抓取10003的包
netstat -anc | grep 10003 --檢測10003的埠狀態變化
看了一下抓取的包，期間只有一個Flags [P.]狀態的包，而大部分都是Flags [.]、Flags [.]，
初步斷定是TCP/IP三次握手協議并沒有建立起來，導致我平臺并不能接收到外圍平臺的報文，且我平臺日志資訊也沒有記錄到關于該交易的錯誤資訊。
且10003的埠在交易發起時，一直保持狀態SYN_RECV的狀態。
求各位大神根據我提供的抓取包的資訊，幫我判斷一下是什么原因導致這個報文沒有發送成功？以及應該從什么方面入手進行排查？以及有什么好的命令可以幫助進行排查。謝謝
tcpdump tcp port 10003
20:52:16.636743 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [S], seq 3488142888, win 14600, options [mss 1460,sackOK,TS val 4094561406 ecr 0,nop,wscale 7], length 0
20:52:16.636772 IP cmis1.bocd.com.cn.documentum_s > in-channel.bocd.com.cn.31131: Flags [S.], seq 4286161207, ack 3488142889, win 14480, options [mss 1460,sackOK,TS val 525283554 ecr 4094561406,nop,wscale 7], length 0
20:52:16.637086 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], ack 1, win 115, options [nop,nop,TS val 4094561407 ecr 525283554], length 0
20:52:16.637280 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], seq 1:1449, ack 1, win 115, options [nop,nop,TS val 4094561407 ecr 525283554], length 1448
20:52:16.637394 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [P.], seq 1449:2746, ack 1, win 115, options [nop,nop,TS val 4094561407 ecr 525283554], length 1297
20:52:16.837832 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], seq 1:1449, ack 1, win 115, options [nop,nop,TS val 4094561608 ecr 525283554], length 1448
20:52:17.239826 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], seq 1:1449, ack 1, win 115, options [nop,nop,TS val 4094562010 ecr 525283554], length 1448
20:52:17.636491 IP cmis1.bocd.com.cn.documentum_s > in-channel.bocd.com.cn.31131: Flags [S.], seq 4286161207, ack 3488142889, win 14480, options [mss 1460,sackOK,TS val 525284554 ecr 4094562010,nop,wscale 7], length 0
20:52:17.636752 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], ack 1, win 115, options [nop,nop,TS val 4094562407 ecr 525284554,nop,nop,sack 1 {0:1}], length 0
20:52:18.043843 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], seq 1:1449, ack 1, win 115, options [nop,nop,TS val 4094562814 ecr 525284554], length 1448
20:52:19.636493 IP cmis1.bocd.com.cn.documentum_s > in-channel.bocd.com.cn.31131: Flags [S.], seq 4286161207, ack 3488142889, win 14480, options [mss 1460,sackOK,TS val 525286554 ecr 4094562814,nop,wscale 7], length 0
20:52:19.636673 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], ack 1, win 115, options [nop,nop,TS val 4094564407 ecr 525286554,nop,nop,sack 1 {0:1}], length 0
20:52:19.651788 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], seq 1:1449, ack 1, win 115, options [nop,nop,TS val 4094564422 ecr 525286554], length 1448
20:52:22.867727 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], seq 1:1449, ack 1, win 115, options [nop,nop,TS val 4094567638 ecr 525286554], length 1448
20:52:24.036691 IP cmis1.bocd.com.cn.documentum_s > in-channel.bocd.com.cn.31131: Flags [S.], seq 4286161207, ack 3488142889, win 14480, options [mss 1460,sackOK,TS val 525290954 ecr 4094567638,nop,wscale 7], length 0
20:52:24.036935 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], ack 1, win 115, options [nop,nop,TS val 4094568807 ecr 525290954,nop,nop,sack 1 {0:1}], length 0
20:52:29.299574 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], seq 1:1449, ack 1, win 115, options [nop,nop,TS val 4094574070 ecr 525290954], length 1448
20:52:32.036489 IP cmis1.bocd.com.cn.documentum_s > in-channel.bocd.com.cn.31131: Flags [S.], seq 4286161207, ack 3488142889, win 14480, options [mss 1460,sackOK,TS val 525298954 ecr 4094574070,nop,wscale 7], length 0
20:52:32.036706 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], ack 1, win 115, options [nop,nop,TS val 4094576807 ecr 525298954,nop,nop,sack 1 {0:1}], length 0
20:52:42.163247 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], seq 1:1449, ack 1, win 115, options [nop,nop,TS val 4094586934 ecr 525298954], length 1448
20:52:48.036495 IP cmis1.bocd.com.cn.documentum_s > in-channel.bocd.com.cn.31131: Flags [S.], seq 4286161207, ack 3488142889, win 14480, options [mss 1460,sackOK,TS val 525314954 ecr 4094586934,nop,wscale 7], length 0
20:52:48.036799 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], ack 1, win 115, options [nop,nop,TS val 4094592807 ecr 525314954,nop,nop,sack 1 {0:1}], length 0
20:53:07.890641 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [.], seq 1:1449, ack 1, win 115, options [nop,nop,TS val 4094612662 ecr 525314954], length 1448
20:53:16.696267 IP in-channel.bocd.com.cn.31131 > cmis1.bocd.com.cn.documentum_s: Flags [F.], seq 2746, ack 1, win 115, options [nop,nop,TS val 4094621468 ecr 525314954], length 0
netstat -anc | grep 10003
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 111.111.240.145:10003 111.111.240.220:31572 SYN_RECV
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 111.111.240.145:10003 111.111.240.220:31572 SYN_RECV
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 111.111.240.145:10003 111.111.240.220:31572 SYN_RECV
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 111.111.240.145:10003 111.111.240.220:31572 SYN_RECV
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 111.111.240.145:10003 111.111.240.220:31572 SYN_RECV
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 111.111.240.145:10003 111.111.240.220:31572 SYN_RECV
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 111.111.240.145:10003 111.111.240.220:31572 SYN_RECV
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 111.111.240.145:10003 111.111.240.220:31572 SYN_RECV
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 :::10003 :::* LISTEN
tcp 0 0 :::10003 :::* LISTEN
uj5u.com熱心網友回復：
這個還真不知道uj5u.com熱心網友回復：
我也不懂,希望樓下能幫您 ( ??ω??)uj5u.com熱心網友回復：
先利用tcp 測驗小工具， 外網做客戶端 ，服務器做服務端，看看是否能連接上。是不是你服務器的ip地址和上次的服務器ip地址不一樣造成的。或是埠被占用。。。。。uj5u.com熱心網友回復：
先ping一下，再檢測一下防火墻轉載請註明出處，本文鏈接：https://www.uj5u.com/qita/109982.html
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