V 2.0 Traffic Messages 1

https://docs.paloaltonetworks.com/pan-os/10-0/pan-os-admin/monitoring/use-syslog-for-monitoring/syslog-field-descriptions/traffic-log-fields#idbe18d2d4-9eb8-4966-bec8-df3a6de70e66

V 2.0 Traffic Messages

Base Rule

General Network Traffic

Network Traffic

V 2.0 Session Traffic Start Allowed

Sub Rule

Traffic Allowed by Network Firewall

Network Allow

V 2.0 Session Traffic Start Denied

Sub Rule

Traffic Denied by Network Firewall

Network Deny

V 2.0 Session Traffic Start Dropped

Sub Rule

Traffic Denied by Network Firewall

Network Deny

V 2.0 Session Traffic Start Reset

Sub Rule

Traffic Denied by Network Firewall

Network Deny

V 2.0 Session Traffic End Allowed

Sub Rule

Traffic Allowed by Network Firewall

Network Allow

V 2.0 Session Traffic End Denied

Sub Rule

Traffic Denied by Network Firewall

Network Deny

V 2.0 Session Traffic End Dropped

Sub Rule

Traffic Denied by Network Firewall

Network Deny

V 2.0 Session Traffic End Reset

Sub Rule

Traffic Denied by Network Firewall

Network Deny

V 2.0 Session Traffic Drop Allowed

Sub Rule

Traffic Allowed by Network Firewall

Network Allow

V 2.0 Session Traffic Drop Denied

Sub Rule

Traffic Denied by Network Firewall

Network Deny

V 2.0 Session Traffic Drop

Sub Rule

Traffic Denied by Network Firewall

Network Deny

V 2.0 Session Traffic Drop Reset

Sub Rule

Traffic Denied by Network Firewall

Network Deny

V 2.0 Session Traffic Deny Allowed

Sub Rule

Traffic Allowed by Network Firewall

Network Allow

V 2.0 Session Traffic Denied

Sub Rule

Traffic Denied by Network Firewall

Network Deny

V 2.0 Session Traffic Deny Dropped

Sub Rule

Traffic Denied by Network Firewall

Network Deny

V 2.0 Session Traffic Deny Reset

Sub Rule

Traffic Denied by Network Firewall

Network Deny

Header: Severity

<severity>

Text/String

 N/A

Type (type)

<vmid>

Text/String

Specifies the type of log; the value is TRAFFIC

Threat/Content Type (subtype)

<vendorinfo>
<tag1>

Text/String

Subtype of traffic log; values are start, end, drop, and deny
Start—session started
End—session ended
Drop—The session dropped before the application is identified and there is no rule that allows the session.
Deny—The session is dropped after the application is identified, and there is a rule to block it or no rule that allows it.

Source Address (src)

<sip>

IP Address

Original session source IP address

Destination Address (dst)

<dip>

IP Address

Original session destination IP address

NAT Source IP (natsrc)

<snatip>

IP Address

If Source NAT is performed, the post-NAT Source IP address

NAT Destination IP (natdst)

<dnatip>

IP Address

If Destination NAT is performed, the post-NAT Destination IP address

Rule Name (rule)

<policy>

Text/String

Name of the rule that the session matched

Source User (srcuser)

<domainorigin>
<login>

Text/String

The username of the user who initiated the session

Destination User (dstuser)

<domainimpacted>
<account>

Text/String

The username of the user to which the session was destined

Application (app)

<object>

Text/String

Application associated with the session

Inbound Interface (inbound_if)

<sinterface>

Text/String

Interface that the session was sourced from

Outbound Interface (outbound_if)

<dinterface>

Text/String

The interface that the session was destined to

Session ID (sessionid)

<session>

Number

An internal numerical identifier is applied to each session

Source Port (sport)

<sport>

Number

Source port utilized by the session

Destination Port (dport)

<dport>

Number

Destination port utilized by the session

NAT Source Port (natsport)

<snatport>

Number

Post-NAT source port

NAT Destination Port (natdport)

<dnatport>

Number

Post-NAT destination port

IP Protocol (proto)

<protname>

Text/String

IP protocol associated with the session

Action (action)

<action>
<tag2>

Text/String

Action taken for the session; possible values are:
allow—the session was allowed by policy
deny—the session was denied by policy
drop—the session was dropped silently
drop ICMP—the session was silently dropped with an ICMP unreachable message to the host or application
reset both—session was terminated and a TCP reset is sent to both sides of the connection
reset client—the session was terminated and a TCP reset is sent to the client
reset server—session was terminated and a TCP reset is sent to the server

Bytes Sent (bytes_sent)

<bytesin>

Number

Number of bytes in the client-to-server direction of the session

Bytes Received (bytes_received)

<bytesout>

Number

Number of bytes in the server-to-client direction of the session

Elapsed Time (elapsed)

<seconds>

Number

The elapsed time of the session

Category (category)

<subject>

Text/String

URL category associated with the session (if applicable)

Packets Sent (pkts_sent)

<packetsin>

Number

Number of client-to-server packets for the session

Packets Received (pkts_received)

<packetsout>

Number

Number of server-to-client packets for the session

Session End Reason (session_end_reason)

<reason>

Text/String

The reason a session was terminated. If the termination had multiple causes, this field displays only the highest priority reason. The possible session end reason values are as follows, in order of priority (where the first is highest):

• threat—The firewall detected a threat associated with a reset, drop, or block (IP address) action.

• policy-deny—The session matched a security rule with a deny or drop action.

• decrypt-cert-validation—The session terminated because you configured the firewall to block SSL forward proxy decryption or SSL inbound inspection when the session uses client authentication or when the session uses a server certificate with any of the following conditions: expired, untrusted issuer, unknown status, or status verification time-out. This session end reason also displays when the server certificate produces a fatal error alert of type bad_certificate, unsupported_certificate, certificate_revoked, access_denied, or no_certificate_RESERVED (SSLv3 only).

• decrypt-unsupport-param—The session terminated because you configured the firewall to block SSL forward proxy decryption or SSL inbound inspection when the session uses an unsupported protocol version, cipher, or SSH algorithm. This session end reason is displayed when the session produces a fatal error alert of type unsupported_extension, unexpected_message, or handshake_failure.

• decrypt-error—The session terminated because you configured the firewall to block SSL forward proxy decryption or SSL inbound inspection when firewall resources or the hardware security module (HSM) were unavailable. This session end reason is also displayed when you configured the firewall to block SSL traffic that has SSL errors or that produced any fatal error alert other than those listed for the decrypt-cert-validation and decrypt-unsupported-param end reasons.

• tcp-rst-from-client—The client sent a TCP reset to the server.

• tcp-rst-from-server—The server sent a TCP reset to the client.

• resources-unavailable—The session dropped because of a system resource limitation. For example, the session could have exceeded the number of out-of-order packets allowed per flow or the global out-of-order packet queue.

• tcp-fin—Both hosts in the connection sent a TCP FIN message to close the session.

• tcp-reuse—A session is reused and the firewall closes the previous session.

• decoder—The decoder detects a new connection within the protocol (such as HTTP-Proxy) and ends the previous connection.

• aged-out—The session aged out.

• unknown—This value applies in the following situations:

• Session terminations that the preceding reasons do not cover (for example, a clear session all command).

• For logs generated in a PAN-OS release that does not support the session end reason field (releases older than PAN-OS 6.1), the value will be unknown after an upgrade to the current PAN-OS release or after the logs are loaded onto the firewall.

• In Panorama, logs received from firewalls for which the PAN-OS version does not support session end reasons will have an unknown value.

• n/a—This value applies when the traffic log type is not end.

Device Name (device_name)

<objectname>

Text/String

The hostname of the firewall on which the session was logged.

Application Category (category_of_app)**

<objecttype>

Text/String

The application category is specified in the application configuration properties. Values are:
business-systems
collaboration
general-internet
media
networking
saas

Application Characteristic (characteristic_of_app)**

<group>

Text/String

Comma-separated list of applicable characteristics of the application