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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  • Risks of Not Restricting Backend Servers to Receive Traffic Only from WAF
  • Steps to Restrict Backend Servers to Receive Traffic Only from CloudGuard WAF SaaS IPs

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  1. HOW TO

Restrict Access to Backend Servers from CloudGuard WAF as a Service IPs Only

Risks of Not Restricting Backend Servers to Receive Traffic Only from WAF

Leaving backend servers open to traffic from sources other than Web Application Firewalls (WAF) exposes them to cyber threats. Without WAF protection, attackers can directly target these servers, leading to risks such as denial-of-service (DoS) attacks, ransomware infections, and full application compromises.

Steps to Restrict Backend Servers to Receive Traffic Only from CloudGuard WAF SaaS IPs

To ensure backend servers only receive traffic from CloudGuard WAF as a Service IPs, follow these steps:

  1. Identify CloudGuard WAF SaaS IPs: Log in to your Infinity Portal account and navigate to the Profile page to find the list of authorized IP addresses.

  2. Update Firewall Rules: Configure your network firewall to allow incoming traffic only from the identified CloudGuard WAF SaaS IPs. This can typically be done through your firewall’s management console.

  3. Modify Server Access Control Lists (ACLs): Update the ACLs on your backend servers to permit traffic exclusively from the CloudGuard WAF IP addresses. This ensures that any traffic not routed through the WAF is blocked.

  4. Test Configuration: After updating the firewall rules and ACLs, conduct thorough testing to verify that only traffic from the CloudGuard WAF is reaching your backend servers.

  5. Monitor and Audit: Continuously monitor network traffic and audit logs to ensure compliance with the new configuration and to detect any unauthorized access attempts.

By implementing these steps, you can significantly enhance the security of your backend servers and protect them from potential cyber threats.

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Last updated 4 months ago

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