抓包工具tcpdump

抓UDP数据包：

tcpdump udp port 3333 and host 222.171.241.100

效果：

[root@iz2ze6e46dwrf06vvr5qm7z ~]# tcpdump udp port 3333 and host 222.171.241.100

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode

listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes

14:06:46.398584 IP 222.171.241.100.ati-ip-to-ncpe > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 120

14:06:46.404637 IP 222.171.241.100.31374 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:46.418888 IP 222.171.241.100.34912 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 60

14:06:46.446192 IP 222.171.241.100.59371 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 70

14:06:46.552662 IP 222.171.241.100.fuscript > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 40

14:06:46.598816 IP 222.171.241.100.47847 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 130

14:06:46.646700 IP 222.171.241.100.33590 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 120

14:06:46.854634 IP 222.171.241.100.61679 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:46.889205 IP 222.171.241.100.54187 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 110

14:06:46.933911 IP 222.171.241.100.9168 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 90

14:06:46.993963 IP 222.171.241.100.61075 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 60

14:06:46.996637 IP 222.171.241.100.32461 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:46.999063 IP 222.171.241.100.40781 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 60

14:06:47.022840 IP 222.171.241.100.9168 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 32

14:06:47.083069 IP 222.171.241.100.31153 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 32

14:06:47.130948 IP 222.171.241.100.60106 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 150

14:06:47.153284 IP 222.171.241.100.webobjects > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 60

14:06:47.207898 IP 222.171.241.100.32684 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 60

14:06:47.244182 IP 222.171.241.100.16598 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 60

14:06:47.398974 IP 222.171.241.100.ati-ip-to-ncpe > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 90

14:06:47.405013 IP 222.171.241.100.31374 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:47.553198 IP 222.171.241.100.fuscript > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 40

14:06:47.599160 IP 222.171.241.100.47847 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 70

14:06:47.630245 IP 222.171.241.100.15434 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 70

14:06:47.647338 IP 222.171.241.100.33590 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:47.788452 IP 222.171.241.100.64522 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 60

14:06:47.854811 IP 222.171.241.100.61679 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:47.889236 IP 222.171.241.100.54187 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 70

14:06:47.893075 IP 222.171.241.100.32684 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 32

14:06:47.934329 IP 222.171.241.100.9168 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 80

14:06:47.994091 IP 222.171.241.100.61075 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:47.995042 IP 222.171.241.100.23360 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:47.999187 IP 222.171.241.100.40781 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 70

14:06:48.058794 IP 222.171.241.100.31153 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 40

14:06:48.074759 IP 222.171.241.100.40781 > iz2ze6e46dwrf06vvr5qm7z.dec-notes
4000
: UDP, length 32

14:06:48.088766 IP 222.171.241.100.32461 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 32

14:06:48.116410 IP 222.171.241.100.27380 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 40

14:06:48.153621 IP 222.171.241.100.webobjects > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:48.207889 IP 222.171.241.100.32684 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:48.244194 IP 222.171.241.100.16598 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:48.387537 IP 222.171.241.100.27380 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 32

14:06:48.405284 IP 222.171.241.100.31374 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 50

14:06:48.419123 IP 222.171.241.100.34912 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 40

14:06:48.456136 IP 222.171.241.100.39052 > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 40

14:06:48.553230 IP 222.171.241.100.fuscript > iz2ze6e46dwrf06vvr5qm7z.dec-notes: UDP, length 40