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    Strata Copilot
    Syslog Flow Export
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    6. Syslog Server Support in Prisma SD-WAN
    7. Syslog Flow Export
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    Prisma SD-WAN

    Syslog Flow Export

    Table of Contents

    Syslog Flow Export

    Prisma SD-WAN will now generate Syslog messages on initial flow-rule classification and end-of-flow for all flows handled by the ION device.
    Where Can I Use This?What Do I Need?
    • Prisma SD-WAN (Managed by Strata Cloud Manager)
    • Prisma SD-WAN
    Generate Syslog messages on initial flow-rule classification and end-of-flow for all flows handled by the ION device. These Syslog messages are in RFC 5424 format. You may configure to export flow logs from an ION device to one or more Syslog servers.
    The minimum device software version required for flow logging is Release 5.1.17 or Release 5.2.3.
    The Format of the flow log and description of the different fields exported in the flow logs are listed below:
    Some of the fields are reserved for future use, and therefore, will not be populated in the flow log.
    Field Name Description
    event time
    Time event occurred on the ION device
    src ip
    Source IP address
    dst ip
    Destination IP address
    dst port
    Destination port
    protocol name
    Protocol name
    reserved for future use
    Field will be always blank in cgxFlowLogV1
    reserved for future use
    Field will be always blank in cgxFlowLogV1
    pkts sent
    Number of packets sent from src ip to dst ip
    pkts recvd
    Number of packets received from dst ip by src ip
    bytes sent
    Total bytes sent from src ip to dst ip
    bytes recvd
    Total bytes received from dst ip by src ip
    src interface
    Interface from which traffic originated
    dst interface
    Interface from which traffic egressed
    path id
    Prisma SD-WAN Path ID of the WAN Path
    app name
    Name of Prisma SD-WAN-matched Application
    flow event
    Event that triggered flow export:
    • New Flow
    • Flow Update
    • Delete Flow
    zbfw classification rules
    One or more ZBFW classification rules separated by a semi-colon(;). ZBFW classification rules include:
    Rule Name: Source Zone Name: Destination Zone Name: Action: Action Code
    • ALLOW—Flow was Allowed
    • DENY—Flow was Denied
    • REJECT—Flow was rejected (Deny + Send TCP RST)
    • UNK_SOURCE_ZONE_DENY—Flow was Denied due to Unknown Source Zone
    • UNK_DESTINATION_ZONE_DENY—Flow was Denied due to Unknown Destination Zone
    • UNK_SOURCE_DESTINATION_ZONE_DENY—Flow was Denied due to Unknown Source and Destination Zone
    Possible Action Code Values:
    • 1 = ALLOW
    • 2 = DENY
    • 3 = REJECT
    • 4 = UNK_SOURCE_ZONE_DENY
    • 5 = UNK_DESTINATION_ZONE_DENY
    • 6 = UNK_SOURCE_DESTINATION_ZONE_DENY
    Sample flow log in RFC 5424 format as shown below:
    <13>1 2020-01-28T23:46:17.000035+00:00 ION-BRANCH-01 cgxFlowLogV1 13593 - - 2020-01-28T23:46:17,192.0.2.10,52520,198.51.100.10,80,tcp,,,0,0,0,0,,WAN-PRIMARY,1234567890123456,enterprise-http,New Flow,Allow-All:allow:1
    The above Syslog message has a header and a body. The Syslog message values populated for the header and the body are:
    Syslog Message HeaderHeader Component Sample Values
    Priority
    <13>
    Version
    1
    Syslog export time in UTC
    2020-01-28T23:46:17.000035+00:00
    Element device name
    ION-BRANCH-01
    App name to identify flow event logs
    cgxFlowLogV1
    Process id of log generator
    13593
    Message id (empty)
    Message id field is not populated by the ION device at this time.
    Structured data (empty)
    Structured data field is not populated by the ION device at this time.
    Syslog Message Body Syslog Message Sample Body
    Flow event log in CSV format 
    2020-01-28T23:46:17,192.0.2.10,52520,198.51.100.10,80,tcp,,,0,0,0,0,,WAN-PRIMARY,1234567890123456,enterprise-http,New Flow,Allow-All:allow:1
    Syslog message body shown above in CSV format can be interpreted as:
    HeadersSample Values
    Time event happened
    2020-01-28T23:46:17
    src ip
    192.0.2.10
    src port
    52520
    dst ip
    198.51.100.10
    dst port
    80
    protocol name
    tcp
    pkts sent
    0
    pkts recvd
    0
    bytes sent
    0
    bytes recvd
    0
    dst interface
    WAN-PRIMARY
    path id
    1234567890123456
    app name
    enterprise-http
    flow event
    New Flow
    zbfw classification rules
    Allow-All:self:unknown:allow:1

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