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Network Monitoring System In CSTNET Long Chun China Science & Technology Network Agenda 1 Introduction of Peakflow SP 2 Basic Traffic Analysis 3 BGP Analysis Function 44 Role of Peakflow SP in Security Area 4 2 Peakflow SP Platform Managed Services Device Customer facing DoS detection and mitigation Converged Platform Device Infrastructure Security Traffic and Routing Analysis Infrastructure Security DoS/worm detection Traceback Analysis Mitigation Traffic and Routing Routing management Transit/peering mgmt Customer accounting Backbone mgmt 3 Peakflow Network Appliances Measurement Collect Netflow, Cflow, Sflow, SNMP and optionally BGP information from network routers/devices Collector – collect data from routers, baseline traffic, detect anomalies. Controller –aggregate data from other devices; create a central network-wide view Intel 2U Servers Deployment Monitor up to 5 routers per Peakflow Device Up to 15 devices managed by controller Reporting Reports available on controller through CLI or GUI Notifications via email, snmp, or syslog 4 Netflow Peakflow examines NetFlow packets that are generated by the router or switch as traffic is forwarded. The NetFlow is analyzed to benchmark network behavior and identify anomalies. 5 Topology 6 Agenda 1 Introduction of Peakflow SP 2 Basic Traffic Analysis 3 BGP Analysis Function 44 Role of Peakflow SP in Security Area 4 7 Traffic Analysis Automatically Configured Analysis Objects: -【Network】 -【Router】 -【Peer】 -【Interface】 No Complex Configuration Objects Customized by User: -【Customer】 -【Profile】 Flexibly customize objects we need 8 Traffic Analysis User define objects: -【Profile】 Include: 1、IP Address(or Block of IP Addresses) 2、AS Path Regular Expressions 3、Local AS/Sub AS 4、BGP community 5、Peer ASN 6、TCP/UDP port 7、 Interface Boolean Operation:AND、OR、NOT We can define analysis objects flexibly: community '2:20'and not 92.2.1.0/25 aspath ‘^23849’ and not aspath ‘^23849_9800’ community ‘2:20’ and aspath ‘^4134’ 9 Traffic Summary 10 Traffic Analysis Base on TCP/UDP Port (1) 11 Traffic Analysis Base on TCP/UDP Port(2) 12 Top Talkers 13 Agenda 1 Introduction of Peakflow SP 2 Basic Traffic Analysis 3 BGP Analysis Function 44 Role of Peakflow SP in Security Area 4 14 Transit Traffic Analysis Object:【Network】 【Router】【Peer】 【Customer】【Profile】【Interface】 Operation:Network BGP Attribute ASxAS 15 Traffic Analysis Base on AS 16 Traffic Analysis Base on AS Path 17 Peering Evaluation and Visualization 18 Agenda 1 Introduction of Peakflow SP 2 Basic Traffic Analysis 3 BGP Analysis Function 44 Role of Peakflow SP in Security Area 4 19 Peakflow SP Anomaly Reporting Profiled Anomalies – deviations from normal traffic levels on the network Misuse Anomalies – Traffic towards specific hosts that exceed what should normally be seen on a network Fingerprint/Worm Anomalies – Traffic that fits a user specified signature 20 Detect Attack - Profiled Anomalies Detects network-wide anomalies such as DDoS attacks and worm outbreaks in non-intrusive data collection methods. A baseline of normal behavior leveraging flow data available from the routers deployed on the network would be built. In real-time, the system compares traffic against the baseline. 21 Detection Classes: Misuse Detected independently from the established baselines, on a set of known attack signatures. Traffic of specific types exceeding what should be normal for a network. Misuse anomalies cover the following types of traffic: ICMP Anomaly TCP NULL Flag Anomaly TCP SYN Flag Anomaly TCP RST Flag Anomaly IP NULL (Proto 0) Anomaly IP Fragmentation Anomaly IP Private Address Space Anomaly 22 Misuse Anomalies - Dark IP 23 Fingerprint/Worm Anomalies(1) 24 Tracing Anomalies Automatically trace the source and destination IP/Port, TCP Flag of abnormal traffic. Distribution of attack traffic by source and destination IP/Port. Trace the network device that the abnormal traffic pass through. 25 Prevent/Mitigate Network-wide Anomalies System can recommend appropriate mitigation measures to mitigate anomalies such as DoS attack and worm outbreaks. Generate recommended ACLs or rate limit commands. Blackhole routing Sinkhole routing 26 Alert BGP Data Source BGP Instability BGP Route Hijacking BGP Down Flow Down SNMP Down DoS Alert Interface Usage: traffic exceeded configured baseline Use E-mail, SNMP Traps, Syslog etc to notify network administrators. 27 Thank you !