TCP、UDP 调试命令 - Jiyu Shao's Blog

Last Edited Time

Aug 9, 2022 03:54 AM

date

Feb 23, 2022

slug

tcp-udp-commands

status

Published

常用命令

扫描端口

# 扫描 TCP 端口
nc -z -v 45.63.36.170 29900-29905

# 扫描 UDP 端口
nc -u -z -v 45.63.36.170 29900-29905

监听端口

# 监听 TCP 端口
nc -l 4444

# 监听 UDP 端口
nc -u -l 4444

# 监听多个 UDP 端口，并且不过期
nc -kluvw 0 4444

# 连接 TCP 端口
nc 127.0.0.1 4444

# 连接 UDP 端口
nc -u 127.0.0.1 4444

Reference

How To Use Netcat to Establish and Test TCP and UDP Connections | DigitalOcean

Linux is known for having a great number of mature, useful command line utilities available out of the box in most distributions. Often, system administrators can do much of their work using the built-in tools without having to install additional software. In this guide, we will discuss how to use the netcat utility.

https://www.digitalocean.com/community/tutorials/how-to-use-netcat-to-establish-and-test-tcp-and-udp-connections