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[root@localhost ~]# netstat -an|grep ":80 " [root@localhost ~]# tcpdump -n port 80 -c 10 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes 11:14:21.075065 IP 218.60.132.210.http > 202.96.155.153.5931: S 1783264581:1783264581(0) ack 617987055 win 17473 11:14:21.100084 IP 173.192.64.171.http > 202.96.155.19.49492: S 173134372:173134372(0) ack 695494683 win 17473 11:14:21.126288 IP 218.60.132.210.http > 202.96.155.153.47703: S 3329693809:3329693809(0) ack 1069703872 win 17473 11:14:21.130454 IP 218.60.132.210.http > 202.96.155.105.21879: S 888380972:888380972(0) ack 1464395311 win 17473 11:14:21.134882 IP 182.50.148.128.http > 202.96.155.154.47184: S 1513981031:1513981031(0) ack 2566593028 win 16384 <mss 1460> 11:14:21.139507 IP 174.127.72.126.http > 202.96.155.154.60956: S 3390026058:3390026058(0) ack 2261836456 win 17473 11:14:21.148721 IP 218.60.132.210.http > 202.96.155.105.10280: S 1690202333:1690202333(0) ack 1926073830 win 17473 11:14:21.295066 IP 173.193.25.244.http > 202.96.155.105.17927: S 248024764:248024764(0) ack 1415390271 win 17473 11:14:21.344014 IP 173.192.64.171.http > 202.96.155.19.45860: S 3287729140:3287729140(0) ack 1238471603 win 17473 11:14:21.390640 IP 218.60.132.210.http > 202.96.154.185.55157: S 2349845591:2349845591(0) ack 4196158787 win 17473 该服务器80端口没有跑任何服务，抓包结果看到其80port不断向外发送数据包，而且tcpdump结果中，左右的ip都不是此机器ip，故怀疑其伪装ip向外发送数据（src ip中还有国外ip），现在需要知道其从80端口发送数据的进程，请大家指点一下吧 补充 ： lsof -i:80 ,也没有输出，因为80端口全部发送的SYN数据包，而且三次握手都是没有建立成功的，否则lsof也可以看到进程名字 用 iptraf 里面第一项看下那个点的发包数过多，频繁 另外iftop -i eth0 -B -m -p 用这个监控下你的网卡出口和进口（-i 后面跟你的网络设备） (责任编辑：IT) |