netflow sflow

series with redundant super engine, redundant Load Balancing power supply, redundant fan, redundant system clock, redundant uplink, redundant switching back board (only for C6500 series ), high Availability of the system is achieved.　 Rich software features. C6000 software supports a wide range of protocols, including NetFlow, VTP (VLAN Trunking Protocol), VQP (VLAN Query Protocol), ISL Trunking, HSRP (Hot Standby Router Protocol) port Security, TACA

master device automatically restarts and becomes a slave device. 8. When the role is stable, the configuration priority and preemption will not take effect immediately. They will take effect only when the role is restarted. VSL Link VSL transmits data traffic and controls traffic. All traffic passing through VSL is encapsulated with a 32-byte header, including the input and output switch port indexes, VLAN numbers, COS values, and other information. Layer-2 protocols supported on VSL include ST

performance standards from servers, storage systems, and network devices, and the duration is no less than 30 days. Monitor the application and server running status through standard business processes, and then determine the peak and low usage of the application, as well as the type and quantity of resources used by the application. Remember, if your Server OS's built-in monitoring tool recognizes virtualization, you can also monitor it or seek professional consultants. 2. Use tools to help co

VPN encryption module that can be installed on site. The VPN encryption module can take over the encryption tasks of the Cisco 1700 series server guard and provide performance up to T1/E1. VPN encryption module MOD 1700-VPN) supports up to 100 remote access tunnels. Cisco IOS software feature set The Cisco Access Router supports all Cisco IOS functions, including multi-protocol routing, QoS, VPN, firewall/IDS, traditional IBM protocols, and currently used applications. Cisco 1720 and 1721 Cisco

interfaces that control the packets that are in and out of the port. ACLs apply to all routed protocols, such as IP, IPX, AppleTalk, and so on.2, NetFlow Flow calculation method: The system needs to process the number of flow per second: (The system needs to analyze the traffic size x1024x1024x1024)/(500x384x8) (280x1024x1024x1024)/(1000x384x8) = 97867.09333 280G bandwidth; sample ratio: 1000:1 384 The average packet length of packets in a class-like

Distributed System View sensor statusin the in a distributed deployment of OSSIM systems, we often need to quickly preview the status of multiple sensors, such as IDS, vulnerability scanning,Netflow, and other subsystems. before completing the experiment, please make sure the browser can connect to Google Maps properly, and set the following method . First inDashboards→Risk Mapsthe sensor is defined in theon first entry, click "Set Indicatorsbutton,

Ossim Server and sensor communication issuesServer analysis data, all from Sensor . communication between server and sensor is important when sensor and server The following subsystems cannot display data when they cannot be contacted: Dashboards instrument panel analysis→SIEM Vulnerabilities Vulnerability Scan not working properly Profiles→Ntop detetion→ossec Server fails Deployment→alienvault→Center cannot contact Asset can initiate a scan to a resource that cannot be added to the datab

full virtual network, providing a speed comparable to memory for private virtual machine-to-virtual-machine traffic.VLAN support:Virtual machines can be bound to separate VLANs to isolate traffic between virtual machines from other physical servers, reduce network load, improve security, and simplify reconfiguration.650) this.width=650; "Width=" 278 "height=" 262 "style=" Width:auto;height:auto; "src=" http://mmbiz.qpic.cn/mmbiz/ orl2fuhmgzcpswwt214liciaoccyvzjnwt7ibgqmhnlxnyonwq23a861jbzptbyfu

a number of plugins, such as file, Elasticsearch, Redis, and so on. Each stage can also be specified in a variety of ways, such as output can be output to elasticsearch, or can be specified to stdout in the console printing. Codec is a new concept introduced by Logstash starting with version 1.3.0 (Codec from Coder/decoder two words). Prior to this, Logstash only supported plain text input and then processed it with a filter. But now, we can process different types of data during the input per

In some business systems, a large amount of data needs to be inserted into the database every minute. I am developing a NetFlow management system and receive more than several thousand data per minute in the database. Although the data volume is not large, it cannot be processed well, and the database may not be stable. If you need to insert so many SQL statements to the database every minute, many of my friends have proposed batch submission, and I a

data between different ports, they are also the destination MAC address based on data packets. The realization of a vswitch usually adopts a full hardware structure and is fast, but it does not have the ability to isolate broadcast data packets like a bridge. L3 switching technology (LAYER3SWITCHING) is an emerging network interconnection technology that integrates the advantages of the above two technologies, also known as layer-3 switching technology. If you only consider IP, it is called IP

performs Packet Exchange through hardware. Routing, such as a single mailbox, can process multiple processes at the same time.L3 devices include routers and switches. Two basic functions are available: Selecting and exchanging L2 information and reducing TTL.Catalyst Switch product with two major L3 switching implementation solutions: multilayer switching and CEFGSR performs L3 line rate switching through the switching matrix. The Catalyst series multi-layer switches implement L3 switching thro

IV ), with a large number of examples to explain the flow monitoring principles and methods, such as open source software xplico application skills,NetFlow The application in the 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

The script is as follows:netflow.sh#!/bin/bash#whiletrue;do # #死循环R1 = ' cat/sys/class/net/eth0/statistics/rx_bytes ' # #获取eth0的收到流量字节数T1 = ' Cat/sys/class/net/eth0/statistics/tx_bytes ' # #获取eht0发送的流量字节数 #sleep5r2= ' cat/sys/ Class/net/eth0/statistics/rx_bytes ' # #获取5s后收到的流量字节数T2 = ' cat/sys/class/net/eth0/statistics/tx_ Bytes ' # #获取5s后发送出去的流量数 #tbps= ' expr $T 2- $T 1 ' # #相减RBPS = ' expr $R 2- $R 1 ' tkbps= ' expr $TBPS / 10240 ' # #换算为KB, as this should be divided by 1024 again in 8 and t

, such as Oracle Web Forms. As more and more applications have web interfaces, this function of NAM becomes very important because it allows administrators to monitor the enterprise's Web communications and behavior. Cisco also uses NAM to monitor IP telephony to find problems in the data tier. Although Cisco's IT department has not yet specifically assessed the benefits of using NAM, ng roughly describes the results they have achieved: "So far it has been interesting." After we installed the

Michigan University in Michigan uses the Lancope Stealthwatch Network Analyzer to detect behavior on the WLAN and track user activity. "We use Stealthwatch to look up abnormal behavior and find out what users are looking at," says Ryan Laus, the university's network manager. Then we use the NAC device (from Bradford Networks) to identify the user, which is a manual process. ” The Stealthwatch,central Michigan University is able to detect externally launched botnet attacks, worms and advanced o

, before doing the project, the foreground and backstage interact in the way. A list and a brief description. 7, talk about the way you know how to do database paging. Table variables, temporary tables, SQL (not In,max), and so on. Then asked me to explain the principle of rownumber, I directly think of the secret. Well, you hit my Achilles heel, and the database doesn't really have much insight. 8, previously done some knowledge of the network aspects of the IDC system. Talked about the icmp,