linux trace network traffic

lower, because the Upload file (including ftp upload and email SMTP) is large, A single traffic volume makes the bandwidth overhead packets and all data packets queue and wait according to the first-in-first-out principle, this explains why the entire network speed becomes slow when someone uploads a file or sends a large email over ftp. Solution speed: 1. to solve these speed problems, the data passing th

Red Hat Linux 7.3 kernel 2.4.18. The eth0 of the server is bound to the external address eth0:192.168.1.3,eth1 bind the internal address eth1:1 172.17.1.1,eth1:2 172.18.1.1,eth1:3 172.19.1.1. Now to achieve the function is the entire export limit in the 512kbit (upload traffic), 172.17 network download traffic to down

."), 0); memset (buf, 0x00, Bufsiz);while (len = recv (CLIENT_SOCKFD, buf, Bufsiz, 0)) > 0){Buf[len]= ' ";printf ("Message from client=[%s]\n", buf);}Close (CLIENT_SOCKFD);}Close (SERVER_SOCKFD);return 0;} 2 Create a client using the Telnet command in Linux Create a new shell script netstat_nap.sh that contains only one valid command Netstat-nap|head-n 2;netstat-nap|grep 8000. Open a Linux termina

In a Linux operating system, P2P Traffic in a heterogeneous network-Linux Enterprise Application-Linux server application information. For details, refer to the following section. Peer-to-Peer (P2P) is a new technology used for file exchange. It allows you to establish distr

Tcpcopy can be used as a stress testing tool, but also to gain real user access traffic to simulate a real-world operating environment, as Tcpcopy's developers introduce it: Tcpcopy is a request-replication (all TCP-based packets) tool with a wide range of applications, Using the Tcpcopy program, you can copy the system traffic that accesses memcached to the membase system. For membase, this

Use linux as the nat service, and use tc to limit traffic-Linux Enterprise Application-Linux server application information. For details, refer to the following section. Recently, some colleagues used bt and e for crazy download. We were greatly affected when playing cs on the Internet, so we made

Linux Command Line tool for sniffing HTTP traffic: httpry For some reason, you need to sniff the HTTP site traffic (such as HTTP requests and responses ). For example, you may be testing the experimental function of a web server, or you are troubleshooting a web application or RESTful service, or you are) troubleshooting or searching for malware downloaded from a

In my previous article shared a "real-time" view of some Linux network card traffic of small script, today to share a view of the local to a specific IP traffic between the idea. I have this requirement because: our storage is a Dell storage device that is used by NFS for multiple business machine mounts, and I need to

Linux traffic control is in today's Network World, and there may not be many people that TC knows. This article is a reference. Explanations and configuration files recorded in previous studies on TC. Eth1: 192.168.1.1, internal network port business requirements: Ensure normal web browsing, FTP, SMTP, POP3, to all oth

Cacti in the English meaning is the meaning of cactus, Cacti is a set of PHP,MYSQL,SNMP and rrdtool development of network Traffic Monitoring Graphics analysis tool, using PHP development, it is composed of a number of PHP page software, mainly for the enterprise's large number of network equipment, server host Can monitor the service, can provide the CPU load, m

Recently, some colleagues used Bt and e for crazy download. We were greatly affected when playing Cs on the Internet, so we made traffic control on Nat and introduced some experience to netizens, hope to help CS fans.The Internet environment is as follows:Eth0 Internet IP Address: A. B. C. dEth1 Intranet IP1: 192.168.0.0/24 for the boss and BTEth2 Intranet ip2: 192.168.1.0/24 For Me And csfansThe Linux-base

Linux Real-time traffic monitoring (iptraf Chinese illustration) After the installation of Red Hat 4, the default will be installed IPTRAF Network Tools, if you do not fully install, you can find Iptraf RPM package installed in the CD, installation completed in the terminal under the Input Iptraf Open tool, successfully opened, you will see the monitoring softwa

Sometimes our customers will find that the server or VPS network is slow, and further find that a lot of bandwidth is occupied, some customers so far do not know how to do. Is there a simple way to figure out which program (or process) is taking up the bandwidth? Linux monitors the flow of small tools, such as Iftop, Iptraf, Ifstat, Darkstat, Bwm-ng, Vnstat, and so on, mostly statistics and monitoring

According to many documents of TC, I have also compiled a configuration record. In actual use, the effect is good. I would like to share it with you for your reference.Environment: the local area network is not large enough to support more than 40 machines. Nat Internet sharing (Intranet: eth0 Internet: eth2)CBQ uses the idle time of hardware to calculate the queue. The hardware is different and the effect is different. It is better to use htb for a l

I have been troubled by this problem for at least two weeks. I have repeatedly reviewed a lot of information and can finally complete the configuration today. Now I'm so excited to write it down. Requirement: I want to test ipp2p traffic control, so I need to build a test environment within the company. Build a dual-nic Linux machine between my network and my co

is available if necessary. 7, optimize Because it is a network device, mainly used to view the next network traffic, and from the 4th can be seen, its collection of all the port can be collected traffic, in fact, many times is not used or not we want to see, here will need to edit the Mrtg.cfg file only need to moni

1. Adding traffic statistics for ip/portsNetwork traffic:0.0. 0.0 8087Out-of-network traffic:172.12. 5.25 82832. View traffic statisticsIptables-l-v-n-XExamples of results:Chain INPUT (Policy ACCEPT29059Packets7794993bytes) pkts bytes Target prot optinchOut Source Destinatio

Network traffic monitoring for Linux machines can be done using iftopInstallation methodUnder the CentOS system1. Install the necessary packagesyum install libpcap libpcap-devel ncurses ncurses-devel2. Download and install Iftop1.0pre4Version is the latest version to February 9, 2017.cd /tmpwget http://www.ex-parrot.com/pdw/iftop/download/iftop-1.0pre4.tar.gztar

Sometimes we need a more real-time view of the network card traffic on the server, here I wrote two small scripts, one with the shell (first write, only one network card can be viewed at a time), the other with Python (after the write, one can view multiple network cards). The script uses a while true "dead loop", ever

(Intelligent learning function). When the study is complete After opening, this time all the traffic is not imported into the spectrometer, directly into the device. And the back end of that device Once cleaned and then back to the server. The previous configuration information is retained. Not proofread will give up! Incoming traffic is normal flow (will release, abnormal will give up) Intelligent Learnin