====== General Description ======  
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SSG supports statistics export for the following [[en:dpi:dpi_options:opt_statistics:statistics_settings|main data streams]]:  
  - NetFlow by protocols — protocol-related information. [[en:dpi:dpi_options:protocols|Protocol numbers are transmitted according to the reference guide]],  
  - NetFlow by directions — information on Autonomous System (AS) numbers. [[en:dpi:dpi_options:opt_statistics:statistics_asn|AS numbers are transmitted according to the reference guide]],  
  - NetFlow for billing (RADIUS accounting) — information on the volume of transmitted data per subscriber. [[en:dpi:bras_bng:radius_integration:radius_accounting|This stream is sent to fastPCRF and converted into RADIUS accounting]],  
  - Full NetFlow — complete (unsampled) data for each subscriber with additional fields for [[en:dpi:qoe:paramdescript|QoE (RTT, retransmissions)]] and NAT flow. [[en:dpi:dpi_options:opt_statistics:statistics_ipfix|Additional fields are available only for the IPFIX format (NetFlow v10)]].  

Full NetFlow can be exported in one of the following formats:  
  * [[https://en.wikipedia.org/wiki/IP_Flow_Information_Export|IPFIX (NetFlow v10)]],  
  * [[http://en.wikipedia.org/wiki/Netflow|NetFlow v5]].  

<note tip>For receiving, processing, and storing NetFlow, we recommend using the [[en:dpi:dpi_components:qoestor|QoE Store statistical data collection software]] and the [[en:dpi:dpi_components:dpiui|DPIUI2 graphical interface]].</note>  

[[en:dpi:dpi_options:opt_li:li_ipfix|IPFIX export for the implementation of Lawful Interception (LI)]]:  
  * ClickStream — users' web requests. [[en:dpi:qoe:use_cases:clickstream_analytics|Use cases in the QoE module]]  
  * Protocol metadata: FTP, SIP, XMPP, POP, IMAP, SMTP  

Additional data streams for IPFIX export:  
  * NAT flow - [[en:dpi:opt_cgnat:log|]]  
  * GTP flow - [[en:dpi:dpi_components:platform:dpi_mobile_spec:ipfix|export of GTP-C signaling information for mobile networks to implement Location-Based Services]]