netflow packet

Packet forwarding rate is an important indicator that affects route performance. Here we mainly explain the specific application of packet forwarding rate in routing. There are many indicators when describing the performance of a vswitch, such as switching capacity (Gbps), Board bandwidth (Gbps), throughput or packet forwarding rate (Mpps) and so on. The most imp

ICMP Packet AnalysisI. Overview:1. ICMP allows the host or route to report errors and provide relevant exceptions. ICMP is a standard protocol for the Internet, but ICMP is not a high-level protocol, but an IP layer protocol. Generally, ICMP packets are used by the IP layer or higher-level protocols (TCP or UDP. Some ICMP messages return error messages to the user process.2. The ICMP packet is used as the d

TCP/IP packet structure In general, we only need to call encapsulated functions or components to complete most of network programming. However, in some special cases, we need to have a deep understanding of the structure of network data packets, and protocol analysis. Such as network monitoring and troubleshooting ...... The IP package is insecure, but it is the foundation of the Internet and widely used in various aspects. There are more than 10 pro

1. tcpdump is a good tool for tracking the system behavior of processes in the local machine. in the debugging of network problems, tcpdump is an indispensable tool, like most excellent linux tools, it features simplicity and power. By default, tcpdump does not capture packets for internal communication on the local machine. According to the network Association I,Tcpdump Strace is a good tool for tracking system behavior calls of processes in the local machine. in network debugging, tcpdump is a

In order to prevent crawlers from crawling articles on unscrupulous websites, we hereby mark and repost the source of the article. Laplacedemon/sjq. Http://www.cnblogs.com/shijiaqi1066/p/3898248.html Overview The tcpdump command is a Linux packet capture command tool that is powerful and easy to use. Tcpdump is developed based on the underlying libpcap library and requires the root permission to run the program. Basic usage and Command Options For e

I. Overview: 1. ICMP agrees to report errors on the host or route and provides relevant exceptions. ICMP is a standard protocol for the Internet, but ICMP is not a high-level protocol, but an IP layer protocol. Generally, ICMP packets are used by the IP layer or higher-level protocols (TCP or UDP. Some ICMP messages return error messages to the user process. 2. The ICMP packet is used as the data of the IP layer datagram, And the header of the datagr

During the packet capture module, we have seen some data packet interception methods as follows:1. Use the pcap software package. The Linux version of pcap is the Libpcap function library, and the corresponding function library in Windows is Winpcap. The protocol analysis software etheral is implemented based on this software package (but not limited.2. Use the original socket. For example, the UDP proxy se

Reading directory Wireshark Introduction Wireshark cannot do Wireshark vs fiddler Other similar tools Who will use Wireshark? Wireshark starts packet capture Wireshark window Introduction Wireshark display Filtering Save Filter Filter expression Packet List Pane) Packet details pane) Wireshark and corresponding OSI Layer-7 Model Specific content of

DHCP principles and packet formatsDynamic Host Configuration Protocol (DHCP) is a Protocol designed by IETF to achieve automatic IP Configuration, it can automatically assign IP addresses, subnet masks, default gateways, DNS Server IP addresses, and other TCP/IP parameters to the client. Understanding the DHCP process can help us eliminate problems related to the DHCP service. DHCP is an application based on the UDP layer (that is to say, only UDP pac

For general users, it is difficult to crack the neighbor's wireless LAN password. Of course, you can also find specific methods and steps by searching. I am also a beginner. Here are my articles. If you are interested, take a look.The following methods are all tested on the XP platform:.You must note in advance that the prerequisite for cracking isYou must have a NIC that is supported by the airodump software., The support Nic can be checked online (http://www.wildpackets.com/support/downloads/d

These two days to see csdn some of the socket sticky packet, socket buffer settings, found that they are not very clear, so check the data to understand the record: One. Two simple concept long connection with short connection:1. Long connection Client side and server to establish a communication connection, the connection is established to open, and then send and receive messages. 2. Short connection The client side communicates with server every tim

for the TCP-based development of the communication program, there is a very important problem to solve, that is, packet and unpacking. I. Why TCP-based communication programs require packets and unpacking. TCP is a "flow" protocol, the so-called flow, is a string of data without bounds. You can think of the river water, is connected into a piece, in the meantime there is no dividing line. However, the general communication program development needs to

Traditional Campus Network Services lacks effective E2E locating methods, resulting in long fault diagnosis time and difficulty, making it difficult to meet user requirements. Network Performance Fault Diagnosis and quality evaluation are very important. Currently, many research groups and standards organizations are engaged in technical research and standard formulation. IETF has developed RFC5357 (A Two-Way Active Measurement Protocol) and RFC4656 (A One-way Active Measurement Protocol (OWAMP

I. Overview: 1. ICMP agrees to report errors on the host or route and provides relevant exceptions. ICMP is a standard protocol for the Internet, but ICMP is not a high-level protocol, but an IP layer protocol. Generally, ICMP packets are used by the IP layer or higher-level protocols (TCP or UDP. Some ICMP messages return error messages to the user process. 2. The ICMP packet is used as the data of the IP layer datagram, And the header of the datagr

I. Overview: 1. ICMP agrees to report errors on the host or route and provides relevant exceptions. ICMP is a standard protocol for the Internet, but ICMP is not a high-level protocol, but an IP layer protocol. Generally, ICMP packets are used by the IP layer or higher-level protocols (TCP or UDP. Some ICMP messages return error messages to the user process. 2. The ICMP packet is used as the data of the IP layer datagram, And the header of the datagr

Code protocol structure definition---------------------------------------# Pragma pack (1) // enters the byte alignment ModeTypedef struct framheader_t{// The data frame header captured by pcapByte dstmac [6]; // target MAC addressByte srcmac [6]; // source MAC addressWord frametype; // Frame Type} Framheader_t;Typedef struct ipheader_t{// Ip address data HeaderByte ver_hlen; // version + Header LengthByte TOS; // service typeWord totallen; // The total length.Word ID; // IDWord flag_segment; //

I have answered a few questions I have submitted in blog posts and csdn. I found a solution code later: Now we need to use C # As a WebServices interface for C ++ to call.WebServices has been defined (only one of the simplest web methods is described here, and security verification is omitted ):Void process (byte [] request, out byte [] Response) (this parameter cannot be changed)Parameter description: the type of the received parameter byte []. The output parameter byte []. Based on the receive

Evaluation of several network packet capture tools and several toolsEvaluation of several packet capture tools by Bin Laden's brotherRecently, I wrote a CMD remote control that says I want to do something on the server.We all know that soft false positives, especially those reported by black software, are normal.For this reason, some people may not install software. Basically, they rely on themselves to ana

I. Overview: 1. ICMP agrees to report errors on the host or route and provides relevant exceptions. ICMP is a standard protocol for the Internet, but ICMP is not a high-level protocol, but an IP layer protocol. Generally, ICMP packets are used by the IP layer or higher-level protocols (TCP or UDP. Some ICMP messages return error messages to the user process. 2. The ICMP packet is used as the data of the IP layer datagram, And the header of the datagr

I. Overview: 1. ICMP allows the host or route to report errors and provide relevant exceptions. ICMP is a standard protocol for the Internet, but ICMP is not a high-level protocol, but an IP layer protocol. Generally, ICMP packets are used by the IP layer or higher-level protocols (TCP or UDP. Some ICMP messages return error messages to the user process. 2. The ICMP packet is used as the data of the IP layer datagram, And the header of the datagram i