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    NetFlow Templates

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    NetFlow Templates

    NetFlow collectors use templates to decipher the fields that the firewall exports. The firewall selects a template based on the type of exported data: IPv4 or IPv6 traffic, with or without NAT, and with standard or enterprise-specific (PAN-OS specific) fields. The firewall periodically refreshes templates to re-evaluate which one to use (in case the type of exported data changes) and to apply any changes to the fields in the selected template. When you Configure NetFlow Exports, set the refresh rate based on a time interval and a number of exported records according to the requirements of your NetFlow collector. The firewall refreshes the templates after either threshold is passed.
    The Palo Alto Networks firewall supports the following NetFlow templates:
    Template
    ID
    IPv4 Standard
    256
    IPv4 Enterprise
    257
    IPv6 Standard
    258
    IPv6 Enterprise
    259
    IPv4 with NAT Standard
    260
    IPv4 with NAT Enterprise
    261
    IPv6 with NAT Standard
    262
    IPv6 with NAT Enterprise
    263
    The following table lists the NetFlow fields that the firewall can send, along with the templates that define them:
    Value
    Field
    Description
    Templates
    1
    IN_BYTES
    Incoming counter with length N * 8 bits for the number of bytes associated with an IP flow. By default, N is 4.
    All templates
    2
    IN_PKTS
    Incoming counter with length N * 8 bits for the number of packets associated with an IP glow. By default, N is 4.
    All templates
    4
    PROTOCOL
    IP protocol byte.
    All templates
    5
    TOS
    Type of Service byte setting when entering the ingress interface.
    All templates
    6
    TCP_FLAGS
    Total of all the TCP flags in this flow.
    All templates
    7
    L4_SRC_PORT
    TCP/UDP source port number (for example, FTP, Telnet, or equivalent).
    All templates
    8
    IPV4_SRC_ADDR
    IPv4 source address.
    IPv4 standard
    IPv4 enterprise
    IPv4 with NAT standard
    IPv4 with NAT enterprise
    10
    INPUT_SNMP
    Input interface index. The value length is 2 bytes by default, but higher values are possible. For details on how Palo Alto Networks firewalls generate interface indexes, see Firewall Interface Identifiers in SNMP Managers and NetFlow Collectors.
    All templates
    11
    L4_DST_PORT
    TCP/UDP destination port number (for example, FTP, Telnet, or equivalent).
    All templates
    12
    IPV4_DST_ADDR
    IPv4 destination address.
    IPv4 standard
    IPv4 enterprise
    IPv4 with NAT standard
    IPv4 with NAT enterprise
    14
    OUTPUT_SNMP
    Output interface index. The value length is 2 bytes by default, but higher values are possible. For details on how Palo Alto Networks firewalls generate interface indexes, see Firewall Interface Identifiers in SNMP Managers and NetFlow Collectors.
    All templates
    21
    LAST_SWITCHED
    System uptime in milliseconds when the last packet of this flow was switched.
    All templates
    22
    FIRST_SWITCHED
    System uptime in milliseconds when the first packet of this flow was switched.
    All templates
    27
    IPV6_SRC_ADDR
    IPv6 source address.
    IPv6 standard
    IPv6 enterprise
    IPv6 with NAT standard
    IPv6 with NAT enterprise
    28
    IPV6_DST_ADDR
    IPv6 destination address.
    IPv6 standard
    IPv6 enterprise
    IPv6 with NAT standard
    IPv6 with NAT enterprise
    32
    ICMP_TYPE
    Internet Control Message Protocol (ICMP) packet type. This is reported as:
    ICMP Type * 256 + ICMP code
    All templates
    61
    DIRECTION
    Flow direction:
    • 0 = ingress
    • 1 = egress
    All templates
    148
    flowId
    An identifier of a flow that is unique within an observation domain. You can use this information element to distinguish between different flows if flow keys such as IP addresses and port numbers are not reported or are reported in separate records. The flowID corresponds to the session ID field in Traffic and Threat logs.
    All templates
    233
    firewallEvent
    Indicates a firewall event:
    • 0 = Ignore (invalid)—Not used.
    • 1 = Flow created—The NetFlow data record is for a new flow.
    • 2 = Flow deleted—The NetFlow data record is for the end of a flow.
    • 3 = Flow denied—The NetFlow data record indicates a flow that firewall policy denied.
    • 4 = Flow alert—Not used.
    • 5 = Flow update—The NetFlow data record is sent for a long-lasting flow, which is a flow that lasts longer than the Active Timeout period configured in the NetFlow server profile.
    All templates
    225
    postNATSourceIPv4Address
    The definition of this information element is identical to that of sourceIPv4Address, except that it reports a modified value that the firewall produced during network address translation after the packet traversed the interface.
    IPv4 with NAT standard
    IPv4 with NAT enterprise
    226
    postNATDestinationIPv4Address
    The definition of this information element is identical to that of destinationIPv4Address, except that it reports a modified value that the firewall produced during network address translation after the packet traversed the interface.
    IPv4 with NAT standard
    IPv4 with NAT enterprise
    227
    postNAPTSourceTransportPort
    The definition of this information element is identical to that of sourceTransportPort, except that it reports a modified value that the firewall produced during network address port translation after the packet traversed the interface.
    IPv4 with NAT standard
    IPv4 with NAT enterprise
    228
    postNAPTDestinationTransportPort
    The definition of this information element is identical to that of destinationTransportPort, except that it reports a modified value that the firewall produced during network address port translation after the packet traversed the interface.
    IPv4 with NAT standard
    IPv4 with NAT enterprise
    281
    postNATSourceIPv6Address
    The definition of this information element is identical to the definition of information element sourceIPv6Address, except that it reports a modified value that the firewall produced during NAT64 network address translation after the packet traversed the interface. See RFC 2460 for the definition of the source address field in the IPv6 header. See RFC 6146 for NAT64 specification.
    IPv6 with NAT standard
    IPv6 with NAT enterprise
    282
    postNATDestinationIPv6Address
    The definition of this information element is identical to the definition of information element destinationIPv6Address, except that it reports a modified value that the firewall produced during NAT64 network address translation after the packet traversed the interface. See RFC 2460 for the definition of the destination address field in the IPv6 header. See RFC 6146 for NAT64 specification.
    IPv6 with NAT standard
    IPv6 with NAT enterprise
    346
    privateEnterpriseNumber
    This is a unique private enterprise number that identifies Palo Alto Networks: 25461.
    IPv4 enterprise
    IPv4 with NAT enterprise
    IPv6 enterprise
    IPv6 with NAT enterprise
    56701
    App-ID
    The name of an application that App-ID identified. The name can be up to 32 bytes.
    IPv4 enterprise
    IPv4 with NAT enterprise
    IPv6 enterprise
    IPv6 with NAT enterprise
    56702
    User-ID
    A username that User-ID identified. The name can be up to 64 bytes.
    IPv4 enterprise
    IPv4 with NAT enterprise
    IPv6 enterprise
    IPv6 with NAT enterprise

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