Tag：data packet
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Time：2021-9-22
Although tools like snort do a great job filtering all the content coming through our network, sometimes you have to look at the raw data. Our best tool for this is “tcpdump”. The most basic way to use tcpdump is to simply issue the following command: tcpdump You can use the – V option for […]
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Time：2021-9-21
Command introduction Ptraf command is an IP LAN Monitor Based on ncurses. It generates various network statistics, including TCP information, UDP count, ICMP and OSPF information, Ethernet load information, node statistics, IP checksum error, etc. [[email protected] ~]# iptraf -bash: iptraf: command not found [[email protected] ~]# yum install iptraf -y Iptraf command is an interactive and colorful IP LAN monitoring tool. It can display the amount of […]
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Time：2021-9-19
Let’s start with a fitness coach. Li Dong, who claims to be the terminator of Asian health, tried to expand his business with the Internet plus mode. In a newly developed chat softwareChen ChenAdvertise on the Internet. The keyboard comes at once. Send “Li Dong” crazily, press enter to send! ” “Sub health terminator”, and […]
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Time：2021-9-13
By James Snell Crazy technology house https://www.nearform.com/blog… In March 2019, by nearform andProtocol LabsI started to implement it for node.jsQuic protocolsupport. This new UDP based transport protocol is intended to eventually replace all HTTP communications using TCP. People familiar with UDP may be skeptical. As we all know, UDP is unreliable, and packets are often […]
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Time：2021-9-9
Introduction to Wireshark packet capture tool This article mainly introducesWiresharkHow does this tool capture packets? Learning and using packet capture tools are very helpful for learning various network protocols. 1. How to capture messages (1) OpenWiresharkAfter the packet capture tool, clickCapture – > Options： (2) In the newly openedCapture optionsYou can see the following interface: […]
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Time：2021-9-8
preface On the Internet, I think you big brothers love and hate What I love is that various powerful technical frameworks have already encapsulated the network, which is simple and easy to use. Every day, requests and fetchdata fly up Hate to be asked at every interview: “What’s the difference between HTTP and TCP?” “What […]
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Time：2021-8-24
preface < font color = #999aaa > as an efficient and free packet capturing tool, Wireshark can capture and describe network packets. Its biggest advantage is free, open source and multi platform support. Under the guarantee of GNU General Public License, users can obtain software and code for free and have the right to modify […]
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Time：2021-8-20
Limited to my low technical level, I hope you can tell me if there are problems in the article.Today, we talk about the communication of swoole.There are already examples on the homepage of the official website of swoole, TCP server and TCP clientOfficial website demoIt’s actually four stepsDetailed introduction on the official website Building server […]
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Time：2021-8-10
1、 Network protocol checksum definition RFC 1071The definition of checksum in: (1) Adjacent octets to be checksummed are paired to form 16-bit integers, and the 1’s complement sum of these 16-bit integers is formed.(2) To generate a checksum, the checksum field itself is cleared, the 16-bit 1’s complement sum is computed over the octets concerned, […]
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Time：2021-8-10
Xhprof is a tool for analyzing PHP execution. I won’t talk about the specific usage here. The analysis result package generated by xhprof often needs to be matched with nginx + graphviz, and relevant files need to be configured to the specified path. However, when using windows or Mac, you often don’t want to bother […]
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Time：2021-8-9
CEIWEI CommMonitor Serial port monitoring wizard is a professional for RS232 / RS422 / RS485 port monitoring Powerful system utility software. CEIWEI Commmonitor monitors, displays, records and analyzes all serial data in the system Port activity. This is a potential problem in tracking application or driver development, serial device testing and optimization […]
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Time：2021-8-6
This article is a reprint of the article. You can get the source code by reading the original text. There is a link to the original text at the end of the article PS: This article is about inter process communication using socket, and the demo is written in kotlin language 1. Using socket Socket […]
