Access Control Server Security Assessment for Enterprise Networks
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Solution Overview
Problem
Enterprise networks are vulnerable to attacks from malicious client devices due to end-to-end encryption, which reduces the effectiveness of conventional firewall deployments and allows malicious clients to bypass security inspections.
Innovation Solution
An access control server that receives requests from client devices to connect with enterprise servers, obtains security attributes from a central repository, and denies connections if the enterprise server does not meet a predefined security threshold, thereby mitigating vulnerabilities and preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If end-to-end encryption is used between client devices and enterprise networks, then communication security is improved, but firewall effectiveness deteriorates because traffic inspection becomes impossible
Solution Approach 1:
The access control server performs security assessments of enterprise servers before allowing client connections. Security attributes are obtained from a central repository in advance, and connections are denied preemptively if servers do not meet security thresholds, preventing malicious access before it can occur
Solution Approach 2:
The access control server acts as an intermediary between client devices and enterprise servers. It receives connection requests from clients, assesses the target server's security attributes, and makes authorization decisions, thereby mediating the interaction and enabling security control without requiring firewall traffic inspection
2Reliability
If conventional firewalls are deployed to monitor connections, then network security is improved, but they become ineffective against encrypted traffic from external client devices
Solution Approach 1:
The access control server serves as an intermediary that handles security assessments before connections are established. It obtains security attributes from a central repository and makes authorization decisions, replacing the need for firewalls to inspect encrypted traffic and providing adaptability to end-to-end encryption scenarios
Solution Approach 2:
Security assessments are performed in advance before encrypted communication begins. The access control server evaluates enterprise server security attributes beforehand and makes connection authorization decisions, enabling network security control without requiring inspection of subsequent encrypted traffic
3Ease of operation
If access is allowed from external client devices to enterprise networks, then network accessibility is improved, but vulnerability to malicious attacks increases
Solution Approach 1:
The access control server performs preliminary security assessments of enterprise servers before allowing external client connections. By obtaining security attributes from a central repository and evaluating them against thresholds in advance, the system enables broad network accessibility while preemptively blocking access to vulnerable servers, thereby reducing attack vulnerability without restricting legitimate access
Solution Approach 2:
The system uses security attributes stored in a central repository as feedback about enterprise server security status. This feedback mechanism enables the access control server to make informed authorization decisions, allowing the network to adapt to security conditions and maintain accessibility while protecting against malicious attacks
Data Source
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AI summary
A method in an access control server of controlling access to an enterprise network includes: receiving, at the access control server from a client computing device outside the enterprise network, a request to establish a connection between the client computing device and an enterprise server in the enterprise network; at the access control server, responsive to receiving the request, obtaining a security attribute of the enterprise server from a central repository outside the enterprise network; determining, based on the security attribute, whether the enterprise server meets a predefined security threshold; and when the enterprise server does not meet the predefined security threshold, denying the request to establish a connection between the client computing device and the enterprise server.