best packet sniffer

Packaging and unpacking (Classic Collection)For the TCP-based development of the communication program, there is a very important problem to be solved, that is, the packet and unpacking. Since I've been working on network communication programming (about three years), I've been thinking about and improving the way that packets and unpacking are addressed. Here's what I think about this question. If it's wrong, The wrong place, begged everyone to corre

Wireshark and tcpdump packet capture analysis experiences 1. Wireshark and tcpdump Introduction Wireshark is a network protocol detection tool that supports windows and UNIX platforms. I generally only use Wireshark on Windows platforms. If it is Linux, I directly use tcpdump, in my work environment, Linux generally only has a character interface. Generally, Linux uses tcpdump, or uses tcpdump to capture packets and then use Wireshark to open the ana

Chengdu Neusoft Information Technology Vocational College (Level 04) Apply layer network packet capture using Hook Technology Class: Class 2 of Visual ProgrammingINSTRUCTOR: Li DanStudent ID: 04311110210 Name: Liu Haiping Abstract Packet capture (interception) technology is mainly used in information security-related fields, especially firewall technology. With the development of the online game industry, m

I. OverviewLinux has already had the packet filtering function since the 1.1 kernel. In the 2.0 kernel, we use ipfwadm to operate on the kernel packet filtering rules. Later, we used ipchains in the 2.2 kernel to control kernel packet filtering rules. In the 2.4 kernel, we no longer use ipchains, but use iptables, a brand new kernel package filtering management t

We know that a gigabit port's wire-speed packet forwarding rate is 1.4881MPPS, The speed packet forwarding rate of the gigabit port is 0.14881MPPS, which is the international standard, but how is it obtained? The specific packets in the transmission process will be preceded by each package 64 (leader) preamble is a 64-byte packet, originally only 512 bit, but in

1. Wireshark and tcpdump Introduction ? Wireshark is a network protocolDetectionToolsIt supports windows and UNIX platforms. I generally only use Wireshark on Windows platforms. If it is Linux, I directly use tcpdump, because Linux in my work environment generally only has a character interface, generally, Linux uses tcpdump, or uses tcpdump to capture packets and then use Wireshark to open the analysis. On Windows, Wireshark uses Winpcap to capture packets, which is encapsulated well and ea

Author: Hunger Garfield (QQ120474) Iojhgfti@hotmail.com Absrtact: For the increasingly rampant denial of service (DoS) attacks on the Internet, this paper analyzes the performance defects of the traditional random data packet tagging algorithm, proposes a new return tracking algorithm based on hash message authentication code, and hppm that the algorithm improves the efficiency and accuracy of the return tracking DoS attack by analyzing its performan

understand the iso8583 standard in English, there are also similar behaviors on the Internet. We have translated the Chinese version of iso8583, so my goal is to learn about iso8583 after reading this article, so that people who have never been in touch with it can comply with the iso8583 packet specification. Now, we should turn into the subject. At the very beginning, financial systems were provided only by big companies such as IBM, such as va

IP source address IP Destination Address TTL service type (ToS) protocol segment offset IPv4 header keyword segment :. The destination IP address field contains a 32-bit binary value, representing the network layer address of the destination host of the data packet. The IP Source Address field contains a 32-bit binary value, representing the network layer address of the data packet source host. TTL is an 8-

TCP Transmit small packet efficiency issues (translated from MSDN) Http://www.ftpff.com/blog/?q=node/16 Summary: When using TCP to transmit small packets, the design of the program is quite important. If the TCP packet is not in the design scenario, theDelay response, Nagle algorithm, and the importance of Winsock Buffering will seriously affect the performance of the program. This article discusses theseP

Solution to TCP packet sticking problem from http://hi.baidu.com/liuwenfei54/blog/item/24fe282dc1f7de34359bf7e1.html2007-03-07 Currently, TCP/IP communication protocol and its standard socket application programming interface (API) are widely used in network transmission applications ). The TCP/IP transport layer has two parallel protocols: TCP and UDP. TCP (Transport Control Protocol) is connection-oriented and provides high-reliability serv

The process of sk_buff encapsulation and Network Packet encapsulation is described in detail.It can be said that the sk_buff struct is the core of the Linux network protocol stack, and almost all operations are performed around the sk_buff struct, its importance is similar to that of BSD's mbuf (I have read "TCP/IP details Volume 2"). What is sk_buff?Sk_buff is the network data packet itself and the operati