netflow

运用Ntop监控网络流量(视频Demo)

牧云@^-^@ 提交于 2020-03-03 07:22:21
运用Ntop监控网络流量 ____ 网络流量反映了网络的运行状态,是判别网络运行是否正常的关键数据,在实际的网络中,如果对网络流量控制得不好或发生网络拥塞,将会导致网络吞吐量下降、网络性能降低。通过流量测量不仅能反映网络设备(如路由器、交换机等)的工作是否正常,而且能反映出整个网络运行的资源瓶颈,这样管理人员就可以根据网络的运行状态及时采取故障补救措施和进行相关的业务部署来提高网络的性能。对网络进行流量监测分析,可以建立网络流量基准,通过连接会话数的跟踪、源/目的地址对分析、TCP流的分析等,能够及时发现网络中的异常流量,进行实时告警,从而保障网络安全。本节将介绍的Ntop便可以提供详细的网络流量明细表。在Ossim系统中集成了Ntop可以直接使用。 1.Ntop简介 ____ Ntop是一种监控网络流量的工具,用NTOP显示网络的使用情况比其他一些网管软件更加直观、详细。NTOP甚至可以列出每个节点计算机的网络带宽利用率。 2.Ntop主要功能 Ntop主要提供以下一些功能: ①.自动从网络中识别有用的信息; ②.将截获的数据包转换成易于识别的格式; ③.对网络环境中通信失败的情况进行分析; ④.探测网络环境中的通信瓶颈,记录网络通信的时间和过程。 ____ Ntop可以通过分析网络流量来确定网络上存在的各种问题;也可以用来判断是否有黑客正在攻击网络系统

OpenNMS 利用 Sentinel处理Netflow(流量流向分析)

梦想的初衷 提交于 2019-12-05 06:21:22
准备环境 CentOS-7-x86_64 Java8 OpenNMS 23.0.4 minion-23.0.4 sentinel-23.0.4 elasticsearch-6.7.1.tar.gz OpenNMS 配置 1 配置ActiveMQ vi $OPENNMS_HOME/etc/opennms-activemq.xml 取消注释 <transportConnector name="openwire" uri="tcp://0.0.0.0:61616?useJmx=false&maximumConnections=1000&wireformat.maxFrameSize=104857600"/> 2 添加minion用户 角色选择 ROLE_MINION和 ROLE_ADMIN minion/minion 启动 Elasticsearch bin/elasticsearch -d Minion 配置 1 配置控制器 config:edit org.opennms.minion.controller config:property-set location Office-Pittsboro config:property-set http-url http://127.0.0.1:8980/opennms config:property-set broker-url

Converting a PCAP trace to NetFlow format

前提是你 提交于 2019-11-30 03:06:47
问题 I would like to convert some PCAP traces to Netflow format for further analysis with netflow tools. Is there any way to do that? Specifically, I want to use "flow-export" tool in order to extract some fields of interest from a netflow trace as follows: $ flow-export -f2 -mUNIX_SECS,SYSUPTIME,DPKTS,DOCTETS < mynetflow.trace In this case, the mynetflow.trace file is taken by converting a PCAP file using the following commands: $ nfcapd -p 12345 -l ./ $ softflowd -n localhost:12345 -r mytrace

Configure Netflow on network devices for PRTG Netflow Monitoring

 ̄綄美尐妖づ 提交于 2019-11-26 16:24:35
Netflow is a feature first introduced into Cisco routers and switches and then flow concept has been widely accepted by other network product vendors. Basically the network devices which support xflow feature can collect IP traffic statistics on the interfaces where xFlow is enabled, and export those statistics as xFlow records to remote defined xFlow collector. PRTG can use this NetFlow feature for detailed bandwidth usage monitoring and it also shows you: where your bandwidth is used who is using it how it is being used why it is being used It lets you see which specific applications are