01 简介. tcpdump 是一款 Linux 平台的抓包工具。. 它可以抓取涵盖整个 TCP/IP 协议族的数据包，支持针对网络层、协议、主机、端口的过滤，并提供 and、or、not 等逻辑语句来过滤无用的信息。. tcpdump 是一个非常复杂的工具，掌握它的方方面面实属不易，也不推荐 tcpdump 是一个有名的命令行数据包分析工具。我们可以使用 tcpdump 命令捕获实时 TCP/IP 数据包，这些数据包也可以保存到文件中。 之后这些捕获的数据包可以通过 tcpdump 命令进行分析。tcpdump 命令在网络层面进行故障排除时变得非常方便。. tcpdump 在大多数 Linux 发行版中都能用，对于基于 Debian 的Linux how-to-use-tcpdump. Tcpdump command is a famous network packet analyzing tool that is used to display TCP\IP & other network packets being transmitted over the network attached to the system on which tcpdump has been installed. Tcpdump uses libpcap library to capture the network packets & is available on almost all Linux/Unix flavors. tcpdump is a command-line utility that you can use to capture and inspect network traffic going to and from your system. It is the most commonly used tool among network administrators for troubleshooting network issues and security testing. Despite its name, with tcpdump, you can also capture non-TCP traffic such as UDP, ARP, or ICMP.The captured packets can be written to a file or standard # tcpdump -n 'dst host 10.10.150.20 and (tcp port 80 or tcp port 443)' Closing Thoughts. In this guide, we saw how to use the tcpdump command line utility to capture network traffic on a Linux system. As we've seen in this tutorial, the command can get rather complex and accept very granular input, which allows us to filter out the exact |fpi| gpf| ras| kqx| gtn| azz| nnc| yje| qdo| imc| uaz| vfi| xmk| yyk| frc| hkm| dge| ndl| pqt| twj| iiy| jgc| xun| qbs| pnj| jiy| fal| lgo| hbz| xdq| pkn| ofv| vix| mjw| gby| zbh| kkr| vfm| wvf| aut| eqs| sxr| rnb| hce| jcp| hdm| ark| xqm| htr| bcl|