udp connection

A denial of service attack is an attacker trying to get the target machine to stop providing service or resource access. These resources include disk space, memory, processes, and even network bandwidth, preventing access for normal users. In fact,

TCP HTTP UDP: This is the communication protocol, that is, the rules of communication, only the two sides in accordance with this rule "speak", the other party can understand or serve. Socket This is to achieve the above communication process to

Http://topic.csdn.net/u/20090105/15/9ee19e77-d848-4186-984a-542292b0d742.html Telnet IP Port =========http://blog.sina.com.cn/s/blog_5f2f51490100di66.html First, how to see which ports the computer is open1, the use of netstat commandWindows

Recently our website often reported 503 errors: "HTTP error 503." The service is unavailable. But the brush one or two and normal. It is estimated that the maximum number of concurrent connections to the Web site is likely to be exceeded. What

Ifstat Introduced Ifstat tool is a network interface monitoring tool, relatively simple to see network traffic Instance Default use #ifstatEth0 eth1KB/S in kb/s out kb/s in kb/s out0.07 0.20 0.00 0.000.07 0.15 0.58 0.00 The default ifstat does

1. Table header File #include #include #include 2. Function prototypes int select (int n,fd_set * Readfds,fd_set * writefds,fd_set * exceptfds,struct timeval * timeout); 3. Function description Select () is used to wait for a change in the state of

MMORPG Server Architecture I. Summary 1. Online game MMORPG Overall server framework, including early, mid-term, some current mainstream architectures 2. Network Game Network layer, including network protocol, IO model, network framework, message

First, the working principle of OpenVPN VPN technology establishes a private tunnel on the public network through key exchange, encapsulation, authentication and encryption, which guarantees the integrity, privacy and effectiveness of the

Bash Socket Programming You can use two special device files in the system to determine if a host's port is open. /dev/tcp/' hostname| Ip/prot #如果是hostname和port是合法的话, Bash will try to account for a TCP connection /dev/udp/' hostname ' | Ip/port

With the development of computer technology, network communication technology and information construction, the number of computers and equipment in enterprise data center is increasing, and the engine room has become an important hub for many

Because recently took over the project is based on the embedded Linux OpenWrt, initially thought will be with the previous server development no big difference, but encountered the problem to analyze the time only found that the tool chain is still

how the TCP/IP protocol stack works 2010-11-14 21:05:42 Tags: tcp  congestion control   Slow start   retransmission   restore original works, allow reprint, please be sure to mark the article   original source  , author information and this

Case 1: Building memcached ServicesCase 2:lnmp+memcachedLocal session information for case 3:phpCase 4:php Implementation session sharing1 Case 1: Building memcached Services1.1 QuestionsThis case requires a quick set up a memcached server, and the

1. Hardware knowledge1.1 nic? RoleModulation or reception of different signals via network card, modulation and demodulation of the number of corresponding signals in unit time? Type10M, 100M, 1000M100Mbps equal to 100M bit per second1.2 Network

Ten years did not write C, this can be said to re-learn, the bottom of the program is to change from W.richard Stevens's masterpiece-Networking apis:sockets and XTI, for two reasons: (1) In my development environment scientific LI Nux 7.0 on the

"51CTO Featured Translations" This article describes some of the Linux command-line tools that you can use to monitor network usage. These tools can monitor data transmitted over a network interface and measure the speed at which data is being

The "four big names" of Linux process ManagementOne or four name catch The four big catch, originally appeared in Winrian creation of martial arts novels, is the court in the Justice of the power of the four disciples, four each bosom stunt,

18 Common commands for monitoring network bandwidth on a Linux serverThis article describes some of the Linux command-line tools that you can use to monitor network usage. These tools can monitor data transmitted over a network interface and measure

1. Linux system service ManagementTool NTSYSV similar to the graphical interface management tool, if no command is installed using Yum install-y NTSYSVCommon services: Crond, iptables, Network, sshd, Syslog, Irqbalance, SendMail, Microcode_ctlAdded

Process Management ToolsProcess management Tools Top/htop/glances/dstat/sarTopis a real-time display of the current system running information of a tool650) this.width=650; "src="