linux trace network traffic

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

Linux System and Performance Monitoring (Network)Date: 2009.07.21Author: Darren HochTranslation: Tonnyom [AT] hotmail.com Followed by the first three articles:Linux System and Performance Monitoring (CPU)Linux System and Performance Monitoring (Memory)Linux System and Performance Monitoring (I/O) 8.0

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

Build a Linux-based VPN Network-Linux Enterprise Application-Linux server application information. The following is a detailed description. Building a VPN is almost one of the most advanced Linux applications. Learning this technology is enough to make you proud of the capit

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

Transfer from http://www.ibm.com/developerworks/cn/linux/l-cn-networkdriver/Network Equipment IntroductionNetwork equipment is an essential part of computer architecture, and if the processor wants to communicate with the outside world, it usually chooses the network device as the communication interface. As is known to all, in the OSI (open Systems Interconnecti

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

be able to know that the hardware is idle in time, that is, after mark_bh, the system will wait for a while before sending. The sending efficiency is very low. The usage of 2 m lines is less than 10%. The kernel version is 2.0.35. 　　 My final implementation is not to set tbusy to 1, so that the system always considers the hardware idle, but the report is not sent successfully. The system will always try again. In this way, the processing will run normally. However, the

network adapter is still a lot of commands, similar to Ifconfig/netstat (click to view the command) is a long time ago the command set, just because the habit of most people still useMany times the network card service restarts when many features do not take effect, this time need to uninstall/reinstall NIC driver moduleQuery NIC module Name:Ethtool-i eth0 #eth0为ifconfig命令查询出来的网卡名Unloading:Modprobe-r Pcnet

Bluetooth devices discussed above, irda-usb.c device drivers support USB IrDa FIR software dogs. IrLAP is a link access protocol layer responsible for IrDa device discovery, retransmission, and traffic control. The IrLMP link management layer and Tiny transport protocol layer (TinyTP) reside on IrLAP. The IrCOMM and IrLAN layers are above them. IrCOMM (implemented in net/irda/ircomm/) provides serial simulation to enable applications running on seria

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

Linux Network Bridge operations-Linux Enterprise Application-Linux server application information, the following is a detailed description. I. Settings 1. Obtain ''bridge configuration'' Ftp://shadow.cabi.net/pub/Linux/BRCFG.tgz 2. Obtain and read ''multiple ethernet ''H

[O M personnel? Why? 06] Using sniffer to diagnose Linux network faults? Why? 05] system security inspection tool-nmaphttp: // www.2cto.com/ OS /201304/200744.htmlfu O M personnel are also known as sniffer in network security. [in O M? Why? 06] Using sniffer to diagnose Linux ne