port protocol

resources, the user's TCP/IP protocol generates an IP packet, which contains the following values, these values are in the IP and TCP or UDP headers: (the bold content indicates the project affected by Nat ):　　• Target IP Address: Internet Resource IP Address• Source IP Address: private IP Address• Target Port: Internet Resource TCP or UDP port• Source

TCP/UDP Common port number 7 Echo (PING)9 DiscardDaytimer19 Word Fuzhou Builder20/TCP FTP Data21/TCP FTP Control File Transfer Protocol22/TCP SSH Secure Login, File transfer (SCP), and port redirection23/tcp Telnet Unsafe Text transfer25/tcp SMTP Simple Mail Transfer Protocol (easy Mail Transfer Protocol) (e-mail)53/T

Wireshark analyzes non-standard port traffic and wireshark PortWireshark analysis of non-standard port traffic 2.2.2 analysis of non-standard port traffic Wireshark analysis of non-standard port traffic Non-standard port numbers are always the most common concern of network

confirmation after receiving the UDP message. Although UDP does not provide reliable delivery, in some cases UDP is the most efficient way to work. (2) Transmission Control Protocol TCP (transmission-Protocol) TCP provides connection-oriented services. TCP does not provide broadcast or multicast services. Because TCP provides reliable, connection-oriented transport services , it inevitably adds a lo

Freemodbus port description ZZ, freemodbus port zz 1. Why port Freemodbus? Why do we need to port Freemodbus? This question needs to be answered from two aspects. First, modbus is a very good application layer protocol, which is concise and relatively complete. For those who

to process these small packets. TCP reverse ident scanThe IDENT protocol allows (rfc1413) to see the user name of the owner of any process connected through TCP, even if the connection is not started by this process. So you can, for example, connect to the http port and use identd to check whether the server is running as root. This method can only be seen after a complete TCP connection is established w

Port numberProtocol Port number:The full name of the port number is the protocol port number, it is used for the application layer and transfer into the interaction, when creating a socket need to know the IP address and port numb

SummaryToday, during the writing of the socket, during which I encountered viewing the status of a certain port, I then looked it up from the Internet and summarized it.ContentAs we all know, the port is not independent, it is dependent on the process. When a process is turned on, its corresponding port is turned on and the process shuts down, and the

into 4 categories: 1, according to the Port Division VLAN This method of dividing VLAN is based on the port of the Ethernet switch, such as S2403 1~4 port for VLAN a,5~17 for VLAN b,18~24 VLAN C, of course, these belong to the same VLAN port can be discontinuous, how to configure, by the administrator decision, If y

your native machine.HTTP access to the local HTML file, equivalent to the native as an HTTP server, and then through localhost access to your own computer on the local server, and then through the HTTP server to access your native file resources.The simple point is that file simply requests a local file and opens it as an unresolved static file for the server. And HTTP is to build a local server and then through the server to dynamically parse to get the file.Other differences:The file

, file transfer access, and remote logon. Remote logon TELNET provides interfaces registered on other hosts in the network using the TELNET protocol. The TELNET session provides a character-based virtual terminal. File Transfer access FTP uses the FTP protocol to provide the file copy function between machines in the network. The application layer is generally a user-oriented service. Such as FTP, TELNET, D

Redis Communication Protocol (protocol) This document is translated from: Http://redis.io/topics/protocol. The Redis protocol compromises between the following three goals: ease of implementation can be efficiently analyzed by computer (parse) can easily be read by humans to understand the network layer The client and

Network Protocol Resolution-802.11 Protocol Summary, protocol-802.11802.11 Protocol Version Description Operating frequency 802.11 Original Standard 2.4G (2 Mb/s) 802.11a New Physical Layer supplement 5G (54 Mb/s) 802.11b The most popular standard, Wi-Fi 2

protocol consisting of requests and responses. It is a standard client server model. HTTP is a stateless protocol. Technical Architecture HTTP is a standard (TCP) for client and server requests and responses ). The client is an end user and the server is a website. By using a Web browser, Web crawler, or other tools, the client initiates an HTTP request to the specified

included in the detailed explanation. The PPP protocol is widely used in many fields, typically remote Internet connections, among them, vrouters are mostly interconnected with vrouters. Two routers run the PPP protocol respectively. One uses CHAP authentication and the other uses PAP authentication. 1. Router PPP encapsulation Configuration In Port mode: A (con

. The FTP service is used to download files and upload the homepage.(2) Telnet: It is a port for remote login, the user can remotely connect to the computer as their own identity, through which can provide a DOS-based communication service. As the previous BBS is-the pure character interface, the support BBS server will open 23 ports, external services.(3) SMTP: Defines the Simple mail delivery protocol, wh

: 0 LISTENING listen TCP 127.0.0.1: 7438 0.0.0.0: 0 LISTENING protocol TCP 127.0.0.1: 8015 0.0.0.0: 0 LISTENING 1456TCP 192.168.3.230: 139 0.0.0.0: 0 LISTENING 4TCP 192.168.3.230: 1957 Protocol: 443 ESTABLISHED 3068TCP 192.168.3.230: 2020 183.62. 96.189: 1522 ESTABLISHED 1456TCP 192.168.3.230: 2927 Protocol: 80 ESTABLISHED 4732TCP 192.168.3.230: 2929

IP Datagram IP is the core protocol in the TCP/IP protocol family. All TCP, UDP, ICMP, and IGMP data are transmitted in the IP datagram format. The IP address only provides the best-effort transmission service. If an error occurs, the IP address will lose the data and send an ICMP message to the source. In addition, IP datagram can not be accepted in the sending order. The IP datagram format is as follows:

Chapter Review:"TCP/IP Detailed Volume 1: Agreement" 1th Chapter Overview-Reading Notes"TCP/IP Detailed Volume 1: Protocol" chapter 2nd link layer-Reading notes"TCP/IP Detailed Volume 1: Protocol" 3rd IP: Internet Protocol (1)-Reading notes"TCP/IP Detailed Volume 1: Protocol" 3rd IP: Internet

Today, a customer response, Remote Desktop can not connect, I looked, ping is normal, telnet a remote port, but also can connect, but the remote Desktop is always not connected, first to help him restart a bit. After the reboot, the remote can log in, went to check the server logs, and found such an error: The RDP protocol component x.224 found an error in the protoc