CloudGuard WAF
  • Documentation Overview
  • What is CloudGuard WAF?
  • Getting started
    • Prepare key information
    • Log in to the Infinity Portal
    • Protect a Web Application / API
    • Deploy Enforcement Point
      • Gateway/Virtual Machine
        • AWS
          • Store Certificates in AWS
          • Store certificates on Gateway
        • Azure
          • Store Certificates in Azure
          • Store Certificates on Gateway
        • VMware
          • Store Certificates on Gateway
          • Configure networking in VMware Deployments
      • WAF as a Service
        • Certificates Managed by Check Point
        • Bring Your Own Certificate
      • Kubernetes Ingress
        • Kong Application Security
        • Istio Application Security
      • Docker
        • Single Docker
          • Deployment using 'docker' command
            • Store Certificates Locally on Docker
          • Deployment in Azure App Services
        • Dual Docker: NGINX/Kong/Envoy + Security Agent
      • Linux / NGINX / Kong
    • Monitor Events
  • Concepts
    • Gateways & Agents
    • Management & Automation
    • Security Practices
    • Contextual Machine Learning
  • Additional Security Engines
    • Anti-Bot
    • API Protection
      • API Discovery
      • Track API Discovery Learning
      • Enforce API Schema
    • File Security
    • Intrusion Prevention System (IPS)
    • Rate Limit
    • Snort Rules
  • SETUP INSTRUCTIONS
    • Setup Custom Rules and Exceptions
    • Setup Web User Response Pages
    • Setup Log Triggers
    • Setup Report Triggers
    • Setup Notification Triggers
    • Setup Behavior Upon Failure
    • Setup Agent Upgrade Schedule
  • HOW TO
    • Edit Web Application/API Settings
    • Edit Reverse Proxy Advanced Settings for a Web Asset
    • Protect an existing production site with CloudGuard WAF's Gateway
    • View Policy of all your Web Applications/APIs
    • Add Data Loss Prevention (DLP) rules
    • Configure Contextual Machine Learning for Best Accuracy
    • Track Agent Status
    • Track Learning and Move from Learn/Detect to Prevent
    • Rotate profile authentication token
    • Upgrade your Reverse Proxy when a Linux/NGINX agent is installed
    • Use Terraform to Manage CloudGuard WAF
    • Authorize Temporary Access for Check Point Support
    • Restrict Access to Backend Servers from CloudGuard WAF as a Service IPs Only
  • Troubleshooting
    • WAF Gateway / Virtual Machine
      • Azure
        • "Unable to find a tag containing the vault's name in the VMSS" Error
        • How To: Configure Key Vault for a Single Gateway
      • NGINX Error: Upstream Sent Too Big Header While Reading Response Header from Upstream
      • How To: Compare Between the Gateway's Certificate and the Upstream Certificate
    • Linux
      • SELinux: Checking Status and Disabling
    • WAF as a Service
      • Certificate Validation Failed: Adjusting CAA Record
      • How To: Redirect a Root Domain to a Subdomain Protected by WAF SaaS
      • How To: Extend Connection Timeout to Upstream
      • How To: Update Expired Certificates
  • references
    • Agent CLI
    • Management API
    • Event Query Language
    • Writing Snort Signatures
    • Events/Logs Schema
    • CVE-2022-3786 and CVE-2022-3602: OpenSSL X.509 Email Address Buffer Overflows (HIGH)
    • CVE-2025-1097, CVE-2025-1098, CVE-2025-24514, CVE-2025-1974: Ingress NGINX Controller RCE (Critical)
  • Resources
    • GitHub
    • Docker Hub
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On this page
  • The Default Log Trigger
  • Customizing Log Triggers
  • Logs structure to Syslog/CEF
  • Syslog
  • CEF

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  1. SETUP INSTRUCTIONS

Setup Log Triggers

PreviousSetup Web User Response PagesNextSetup Report Triggers

Last updated 2 months ago

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CloudGuard WAF protects web servers from attacks. It is possible to trigger a logging event that includes information about the event that was detected or prevented.

Logs can be configured to reach a variety of destinations.

The Default Log Trigger

The default setup of CloudGuard WAF is already configured with a log trigger, and so, to view logs triggered by CloudGuard WAF event detection, no additional action is required.

The default Log Trigger object is configured to log the most interesting events:

  • Malicious events.

  • High severity (and above) suspicious events.

  • Most important identifying data from the request.

The configuration of the default Log Trigger object can be altered, but the object cannot be deleted.

If the default configuration has been altered, it is possible to click "RESET TO DEFAULT VALUES" at the bottom of the edit window to return to the default factory settings of this object as defined by Check Point.

Customizing Log Triggers

Step 1: Create a Log Trigger object

Go to Policy->Triggers and click on the New icon, the select Log:

Configure a new name to the new trigger object:

Step 2: Configure Trigger conditions ("When to Log")

Select the conditions in which logs are issued:

  • Detect/Prevent Events - Logs events caught by CloudGuard WAF engines in "Detect" mode or blocked by CloudGuard WAF engines in "Prevent" mode in addition to blocking.

If configuration in CloudGuard WAF is set to "Detect" mode, Log Trigger configuration is the only action CloudGuard WAF will take upon detecting an attack.

  • Logging all web requests regardless of CloudGuard WAF configuration.

Logging all web requests has a substantial impact on resources and network bandwidth consumed by CloudGuard WAF.

Step 3: Configure Trigger additional content ("What to Log")

Select the additional data you want to appear in the log sent upon event.

Additional logging for suspicious events from Severity "X" - Allows conditionally adding the Response Body and Response Code to logs according to the severity of the event reported.

Adding Request Body and Response Body to logs has the potential of substantially impacting the resources and network bandwidth consumed by CloudGuard WAF, depending on the traffic. For this reason:

  • The response body is conditional to the severity of the suspicious event.

  • Either body content will not appear in the log if CloudGuard WAF blocked the request prior to reading their values (for example, upon blocking a request based on its URL). In the case of response body, it will be logged only if the action is set to "Detect" and not "Prevent" as no response will ever arrive, if the request is blocked.

Step 4: Configure Trigger destination ("Where to send the Log")

This configuration determines the destination of the logs sent from the CloudGuard WAF agent, and multiple options can be selected.

The trigger destination can be:

  • Gateway/agent - Logging will be saved locally when possible in the folder /var/log/nano_agent.

  • Syslog service and/or CEF service - Log to an external Syslog/CEF service by adding:

    • A destination address

    • Port (Usually 514 in both cases)

    • Either selecting UDP (common for syslog) or TCP (common for CEF).

Step 5: Setup your security practice to use the new Log Trigger object/s

Browse to Policy->Assets and edit the asset you wish to modify.

Go to the relevant practice tab and scroll to the bottom.

Click on the '+' icon next to Triggers and add your new Log Trigger object.

Logs structure to Syslog/CEF

Syslog

  • Host name - indicating the host name where the agent is installed

  • Application name - indicating the nano-service issuing the log.

Following the syslog header there are space delimited key value pairs in the structure of keyname='value'.

Syslog Example

<133>1 2022-05-17T05:55:37.623Z cpnano-agent-915faaab-6a40-4b55-be93-872e911397c0 HTTPTransactionHandler - 5 - title='API Request' agentId='915faaab-6a40-4b55-be93-872e911397c0' issuingEngineVersion='1.2228.372599' serviceName='HTTP Transaction Handler' eventReferenceId='eff9c697-d689-46c8-b702-87c92c728164' eventConfidence='Very High' matchedParameter='[readingValue]' matchedSample='[-45]' matchReason='[Value is lower than the minimum allowed value: -45 < 1.000000]' sourceIP='192.168.154.1' httpSourceId='192.168.154.1' sourcePort='64758' httpHostName='192.168.154.129:8080' httpMethod='POST' httpUriPath='/myApp/setParam' httpUriQuery='' ruleId='d8c0fda7-2ad1-e7ab-32bc-d1a6af6a2ca0' securityAction='Prevent' waapOverride='None' practiceType='Threat Prevention' practiceSubType='Web API' assetId='d8c0fda7-2ad1-e7ab-32bc-d1a6af6a2ca0' assetName='Customer Portal' practiceId='08c0fdac-3295-e034-be39-5ab4c2d11a28' practiceName='MY WEB API PROTECTION PRACTICE' waapIncidentType='Schema Validation' waapIncidentDetails='OpenAPI schema validation failed'

CEF

  • Device Vendor - Check Point.

  • Device Product - indicating the nano-service issuing the log.

  • Event Name - This field will appear in the log structure but is not sent in the key-value pair system.

  • Severity

Following the CEF protocol fields there are space delimited key value pairs in the structure of keyname=value.

CEF Example

CEF:0|Check Point|HTTPTransactionHandler||Event Driven|API Request|High|agentId=915faaab-6a40-4b55-be93-872e911397c0 issuingEngineVersion=1.2228.372599 serviceName=HTTP Transaction Handler eventReferenceId=ad7a5181-b5d3-4b54-bd5b-106e180f0c9d eventConfidence=Very High matchedParameter=[readingValue] matchedSample=[-90] matchReason=[Value is lower than the minimum allowed value: -90 < 1.000000] sourceIP=192.168.154.1 httpSourceId=192.168.154.1 sourcePort=56060 httpHostName=192.168.154.129:8000 httpMethod=POST httpUriPath=/myApp/setParam httpUriQuery= ruleId=d8c0fda7-2ad1-e7ab-32bc-d1a6af6a2ca0 securityAction=Prevent waapOverride=None practiceType=Threat Prevention practiceSubType=Web API assetId=d8c0fda7-2ad1-e7ab-32bc-d1a6af6a2ca0 assetName=Customer Portal practiceId=08c0fdac-3295-e034-be39-5ab4c2d11a28 practiceName=MY WEB API PROTECTION PRACTICE waapIncidentType=Schema Validation waapIncidentDetails=OpenAPI schema validation failed

Events are sent to CloudGuard WAF cloud to be visible in the .

Cloud - CloudGuard WAF Cloud, to be viewed by the CloudGuard Application .

Syslog protocol is defined by . The structure starts with a priority value in '<>' followed by a timestamp of the log. The agent will also send a value in the syslog header for:

The possible keys and description can be seen in the documentation page.

CEF protocol is explained . The protocol fields are '|' character delimited and the agent will send the value for:

The possible keys and description can be seen in the documentation page.

events views and dashboards
event views under Monitor
RFC 5242
Events/Logs Schema
here
Events/Logs Schema