linux sniff network traffic

indicates the carrier error rate; rxfram/s frame arrangement error; rxfifo/s accept FIFO error; txfifo/s send FIFO error. The above output shows that all kinds of errors are zero, which proves that the network works well. Linux performance monitoring is generally used to monitor network performance. Here are the following points: 1. Check all

How to limit network bandwidth in Linux If you often run multiple network applications on the Linux desktop or share bandwidth with multiple computers at home, you may want to better control the bandwidth usage. Otherwise, when you download a large file using the download tool, the interactive SSH session may become sl

Linux Advanced Programming --BSD Socket of network programmingTenet: The learning of technology is limited and the spirit of sharing is limitless.a Fundamentals of network communicationTCP/IP Protocol Cluster Foundation: TCP/IP is a protocol cluster because TCP/IP includes TCP, IPS, UDP, ICMP, and many other protocols. is the OSI model and the TCP/IP model, TCP/

Ifconfig eth0 shows the configuration of an Ethernet card Ifup eth0 enable a ' eth0 ' network device Ifdown eth0 disables a ' eth0 ' network device Ifconfig eth0 192.168.1.1 netmask 255.255.255.0 control IP Address Ifconfig eth0 promisc set ' eth0 ' into promiscuous mode to sniff packets (sniffing) Dhclient eth0 enable ' eth0 ' in DHCP mode Route-n Show rou

Original link: http://www.ibm.com/developerworks/cn/linux/l-hisock.htmlUsing the Sockets API, we can develop client and server applications that can communicate on the local network or on a global scale over the Internet. As with other APIs, you can use the Sockets API in a number of ways to improve the performance of the socket or to limit the performance of the socket. This article explores 4 ways to use

Now it's time to put all of the previous theoretical knowledge into practice. Next, we will explore: ? Configuration file for network interface in Red Hat 7 ? Using Ifconfig to check and configure interfaces ? Adding and editing static routes ? Using Netstat to monitor/troubleshoot network interfaces A Key files and scriptsThe actual process of network interface

Guide The most important and basic Linux Network command collection that aspiring Linux system administrators and Linux enthusiasts must know. At It's FOSS we are not talking about the "command line aspect" of Linux every day. Basically, I'm more focused on the desktop

Basic Linux Network commands, you deserveGuideAmbitious Linux system administrators and Linux enthusiasts must know the most important and basic collection of Linux Network commands. In It's FOSS, we don't talk about Linux's "comm

Article title: Tcpdump command usage and example-linux network analysis. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. As the name suggests, TcpDump can completely intercept the "

variable in Linux, representing the time. Its unit varies with the hardware platform.A constant Hz is defined in the system, representing the number of minimum time intervals per second. In this way, the unit of jiffiesIt is 1/Hz. Jiffies on Intel is measured in 1/100 seconds, which is the minimum time that can be distinguished by the system.Interval. Therefore, expires/Hz is the cycle of the clock in seconds.Function is the callback function after t

interface will affect the security and stability of the server to some extent, therefore, This is not a detailed introduction to this approach here. ） ifconfigThe command temporarily configures the IP address (temporarily configuring the IP address, i.e. the configuration will expire when we restart the computer or restart the network service) setupThe tool permanently configures the IP address (the tool setup is Red Hat developed so that und

ensuring a certain degree of security. RFC 1918 specifies the IP address range that can be used for local TCP/IP networks. These IP addresses are not routed over the Internet and therefore do not need to be registered. By assigning IP addresses in this range, you can effectively limit network traffic to the local network. This is a fast and effective way to allo

can let snort analyze the network traffic to match some user-defined rules and take certain actions based on the results of the test.Snort download, install,Snort configurationGroupadd snortUseradd-g Snort snort-s/bin/falsePasswd-s snortMkdir-p/etc/snort/rulesMkdir-p/var/log/snort/archiveChown-r Snort.snort/var/log/snortCD etc; CP */etc/snortSniffing deviceSnort-dev-VUsing this command will cause snort to

the network interface, traffic and more properties.2. Use the hostname command-view host nameIn a Linux system, a considerable portion of the network services are identified by the host name of the machine, if the hostname is improperly configured, may cause program function failure. Use the hostname command to view t

Brother Bird's Linux private cuisine (server)@ (Study note) [linux| Markdown| Notes][TOC] Chapter II Network basic Concept 2.1 What is a network? OSI Seven layer protocol Layered Responsible for content Layer 1Physical layers Physical Layer Because the

-I eth0 indicates the network port to listen -W log output to the file named log (libpcap format) The filter_expression parameter is tcp dst port 50000, which only listens to tcp packets whose target port is 50000. More examples: /* The monitored destination address is traffic other than the intranet address (192.168.3.1-192.168.3.254 */ # Tcpdump dst net not 192.168.3.0/24 /* Monitor

need to tell yourself what to do in a packet, and you should suggest how to do it.The main algorithms for detecting and controlling data traffic through windows are:RttTo determine whether congestion, not only through the window to detect congestion, but also through the direct measurement of round-trip time. Window detection is observed, and round trip time belongs to the measurement. The first congestion control algorithm Vegas is monitored and con

If you often run multiple network applications on a Linux desktop or have multiple computers sharing bandwidth at home, you might want to better control the use of bandwidth. Otherwise, when you download a large file using the downloader, the interactive SSH session can become slow and unusable, or when you sync a large folder through Dropbox, your roommate may complain that the video stream is choppy on he

First, the Linux system networking settingsAfter we installed the Linux system, the first is to configure the network services, after all, if the computer is not networked it is a calculator. When configuring network functions, it is simple and quick to start with the dhclient command (

(CPU execution Time), the proportion of time spent by the three is about 250: 30: 1, which is based on the packet size of bytes. The larger the ratio of the three, the longer the transmission (or receipt) and DMA packets are the time bottlenecks. During interrupt processing, it takes a little longer to "New packets arrive" than "packet transfer completed. Keywords: Linux, Protocol driver, network card driv