FQDN Security Policy Enforcement via Dynamic IP Feedback
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Solution Overview
Problem
Current network security policies defined by Fully Qualified Domain Names (FQDNs) face security vulnerabilities due to the delay in dynamic IP address updates, allowing malware to bypass Layer 7 policy enforcement during initial network communications, creating a security hole.
Innovation Solution
Implementing a feedback mechanism that dynamically resolves FQDN address objects to IP addresses using network logs and a learning mode process, periodically updating IP address information to enrich security policies with Layer 3 information, enabling enforcement during initial session setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If security policies are enforced based on Layer 7 FQDN information, then policy accuracy is improved, but there is a delay in IP address updates creating a security hole during initial communications
Solution Approach 1:
The system performs preliminary actions by establishing Layer 3 IP-based security rules before Layer 7 FQDN information is available. This allows security enforcement to begin immediately at the network layer, preventing the security hole that exists when waiting for FQDN resolution and update delays to expire.
Solution Approach 2:
The system implements feedback mechanisms that monitor and update IP address information dynamically. When FQDN resolutions or network logs provide updated IP address mappings, the system feeds this information back to refresh the Layer 3 security rules, ensuring continuous accuracy without delaying initial security enforcement.
2Measurement precision
If security policies wait for Layer 7 FQDN information before enforcement, then policy precision is improved, but security response speed deteriorates
Solution Approach 1:
The security enforcement process is segmented into two independent layers: Layer 3 IP-based enforcement that operates immediately with high speed, and Layer 7 FQDN-based enforcement that provides precision when information becomes available. This segmentation allows both speed and precision requirements to be satisfied simultaneously at different stages of the security check.
Solution Approach 2:
Layer 3 security rules are applied in advance before Layer 7 FQDN information is resolved. This preliminary enforcement at the IP level ensures that even if FQDN information is delayed or unavailable, security protection is already active, eliminating the speed penalty of waiting for FQDN processing.
3Reliability
If dynamic IP address updates are implemented, then security policy reliability is improved, but system complexity increases
Solution Approach 1:
The system uses network logs and FQDN resolution services as intermediary components to bridge Layer 3 IP addresses and Layer 7 FQDN information. These intermediaries automatically provide IP address updates without requiring complex manual configuration or management, achieving high reliability while keeping the feedback mechanism relatively simple.
Solution Approach 2:
The security system automatically monitors network logs and FQDN resolutions to self-update IP address information for security rules. This self-service approach eliminates the need for manual intervention or complex external management systems, maintaining high reliability through automated updates while minimizing added complexity.
Data Source
AI summary
Techniques for providing a feedback mechanism to enforce a security policy are provided. In some embodiments, dynamic resolution of Fully Qualified Domain Name (FQDN) address objects in policy definitions includes receiving a security policy that includes a domain name (e.g., the network policy can include a network security rule that is based on the domain name); and periodically updating Internet Protocol (IP) address information associated with the domain name based on a feedback mechanism that utilizes network logs (e.g., implemented using a learning process for FQDN to IP address mappings) to facilitate a more effective security policy enforcement.