netflow sflow

explain the flow monitoring principles and methods, such as open source software xplico application skills, NetFlow in the application of abnormal traffic. The paper also introduces the establishment of a network log traffic monitoring network with open source Ossim security system.This book, from the perspective of cyber security personnel, shows how the network intrusion occurs when you are confronted with a multitude of clues about how to tap into

Http://www.tuicool.com/articles/mAn6ziB Preface Virtual network is really very complex, this time will learn the knowledge "hodgepodge", must have some basic knowledge to understand, such as IP Netns, Openvswitch later have the opportunity to write these basic – Openvswitch is a software that implements multi-tier virtual switches in Linux based on the Apache License 2.0. Can be programmed to achieve large-scale network automation, but also support the standard management interfaces and protocol

Cloud Firewall is a new concept, the first by the IT giant Cisco proposed, their approach is: upgrade their firewalls to the "cloud" firewall, to achieve dynamic prevention, active security. Cisco believes that the emergence of the cloud firewall means the emergence of the fifth generation of firewalls (the first four generations are: software firewalls, hardware firewalls, ASIC firewalls, UTM). The 4 characteristics of cloud Firewall include: Anti-Zombie network/trojan, prevent network interna

-ROUTE-MAP) #set interface null 0 turns on the NetFlow switch on the E0/1 interface of the export router to allow us to view the results and invoke PBR on the interface: Router (config) #interface ETHERNET0/1 Router (config-if) #ip Route-cache Flow Router (config-if) # IP policy route-map PBR Router (config-if) #exit Connectivity testing of devices on a remote host on the intranet: C:>ping 200.1.1.100 Pinging 200.1.1.100 with bytes of data: Re

, with the ability to grab the package we want, the smaller the crawl length, the better. Setting Snaplen to 0 means that tcpdump automatically chooses the appropriate length to crawl the packet. -T type forces tcpdump to parse the received packets by the package structure described by the protocol specified by type. The currently known type has the following protocols: AODV (Ad-hoc on-demand Distance Vector Protocol, on-demand distance vector routing protocol, used in Ad hoc (point-to-point m

corresponding port (each manufacturer has its own understanding) In this way, when the package comes in, the switch will view the hardware forwarding table and directly forward it without going through the route table query, that is, one route of the switch. The principle of the switch is multiple times. Each manufacturer has different definitions in this section, but the principle is the same. The cef table is used in cisco, and software-based cef is also integrated in the vro, the cef incl

configure: Login and password Transport input output Exec-timeout Local AAA SSH timeout and ssh authentication-retries to minimum number Enable only SSH and SCP for access and file transfer to/from the router6. Protect Forwarding Plane Enables Cisco Express Forwarding (CEF) or distributed CEF on the router, when available Anti-spoofing Blocks all IANA reserved IP address blocks Blocks private address blocks if customer desires Installa default route to NULL 0, if a default route is not being u

particular, 6509 is the most widely used. All models support the same super engine and interface module, protecting users' investment. This series of features mainly include: High port density. Supports up to 384 10/100 BaseTx adaptive Ethernet ports, 192 100 BaseFX optical fiber fast Ethernet ports, and 130 Gigabit Ethernet ports (GBIC slots ). Fast. The C6500 switching backplane can be extended to 256 Gbps, and the multi-layer switching speed can be extended to 150 Mpps. The C6000 switching b

, then we get a pointer pointing to the content address memory (memory address memory) in the switch, where it is the matched value. The vswitch also has a triple content address table, which can match 0, 1, or none. That is, not all matching addresses. Centralized forwarding: Only one Forwarding Table (such as the 6500 series and 4000 Series) is available. All data is forwarded through the central forwarding engine, which contains a forwarding table. Distributed forwarding: You can make local f

Cloud fire wall: Source: CISCO defines a text concept of the fifth-generation firewall when promoting ASA; Technology: passthrough firewall supports cloud-related functions such as cloud Policy Library update and cloud access (SSLVPN) Cloud monitoring (Netflow; Entity: it is still deployed at the gateway location such as the enterprise CPE side and data center. Cloud Firewall: Source: a comment made by some cdns in China after the security filter

software, which are basically based on desktop management, device management, and service management. However, SNMP, NetFlow, and most of them are commercial software. We recommend you a good book: Original: Network managementaccounting and performance strategies Chinese version: Network Management: billing and performance management policies It is recommended that you read the English text and read it all. You can basically become a management exper

; The user needs toXilinxof theFPGATo be configured, so you need to installise9.1isoftware, and relatedFPGAthe tools, such asModelsim(FPGAlogic Simulation),Chipscope(on-chip logic analysis). Also need to installNETFPGA Base Packagebefore installation, you will need toJavaand theRpmforge Yumsupport for the toolkit. You need to be aware of the issue of the version of each software that is installed because there is a big dependency on each other. Open Source Projects in the http://www.netfpga.or

the database.The general format of database operations is:Ovs-vsctl list/set/get/add/remove/clear/destroy table record column [value]By default, ovsdb has the following data tables:Bridge, controller, interface, mirror, netflow, open_vswitch, port, qos, queue, ssl, sflowThat is, the table can be any of the above. Record is the value of the name field in the data table, column is the field name and value field value of any field in the data table.Basi

With the increase in network size, complexity and traffic, the need for continuous and precise monitoring is greater than ever. Continuous monitoring is an important part of detecting security issues, misconfiguration, equipment failures, and the execution of traffic engineering.At the highest level, it is a push-based monitoring approach: Data plane devices, such as switches and routers, stream data about traffic and performance to the software that performs the analysis. Network telemetry is b

Nfsen installation encountered the following problems: I:Error Message Can't locate rrds. PM in @ INC (@ INC contains:./libexec./installer-items>/Etc/perl/usr/local/lib/perl/5.10.1/usr/local/share/perl/5.10.1>/Usr/lib/perl5/usr/share/perl5/usr/lib/perl/5.10/usr/share/perl/5.10>/Usr/local/lib/site_perl.) At libexec/nfsenrrd. pmline 38.> Begin failed -- Compilation aborted atlibexec/nfsenrrd. PM line 38.> Compilation failed in require at libexec/nfsen. pmline 43.> Begin failed -- Compilation abort

choice of motherboard integrated graphics card. Figure2. netfpgaSystem Framework Software Centos 4.4 and centos 4.5 centos 5.1 are recommended in the operating system. You need to configure Xilinx FPGA, so you need to install the ise9.1i software and related FPGA tools, for example, Modelsim (FPGA Logical simulation) and chipscope (On-Chip logical analysis. You also need to install netfpga base package, and Java and rpmforge Yum toolkit support before installation. P

banner and provides facility to add text to automatically configure: Login and password Transport input Output Exec-Timeout Local aaa SSH timeout and SSH Authentication-retries to minimum number Enable only SSH and SCP for access and file transfer to/from the router6. Protect forwarding plane Enables Cisco Express Forwarding (CEF) or distributed CEF on the router, when available Anti-Spoofing Blocks all IANA reserved IP address blocks Blocks private address blocks if custome

divide by 1024 and fill in the alert email box to complete the addition of the threshold template. Apply the created threshold template. On the console tab, click devices, select the host to which the template is applied, and click the topCreate graphs for this hostClick the auto-create thresholds link to apply the created threshold template. After setting, click thresholds in the left-side menu under the console tab. You can manage created alarms here. Click the threshld tab to view the tr

Tool Name:Solarwinds engineer Edition Www.solarwinds.net Recommendation reason: Some readers said: "in less than an hour, I downloaded and installed the Authorized Version of solarwinds from the website. Soon, I will be able to prepare a line usage report, and the line usage and basic response time functions are very good. In addition, the data will be saved, this allows me to view data for one week, one month, or one year." Tool Name:NetwatchKit Company Name: crannog Software Website: www.crann

passwordTransport input outputExec-timeoutLocal AAASSH timeout and ssh authentication-retries to minimum numberEnable only SSH and SCP for access and file transfer to/from the router 6. Protect Forwarding PlaneEnables Cisco Express Forwarding (CEF) or distributed CEF on the router, when availableAnti-spoofingBlocks all IANA reserved IP address blocksBlocks private address blocks if customer desiresInstalla default route to NULL 0, if a default route is not being usedConfigures TCP intercept fo