Deep SSL/TLS Inspection
4CGuard SSL/TLS Inspection decrypts, evaluates, and re-encrypts encrypted traffic streams in real time, enabling the NGFW, IPS, and Web Filtering engines to stop malware payloads and data exfiltration hidden within HTTPS.
90%+ of Network Traffic Is Encrypted — Including Threats
While encryption protects user privacy, cybercriminals use SSL/TLS to disguise malware command-and-control communications, deliver ransomware payloads, and exfiltrate proprietary corporate data past blind perimeter firewalls.
Inability to inspect encrypted HTTPS web downloads, emails, and API interactions.
Severe CPU bottlenecks on firewalls attempting software-based SSL decryption.
Privacy and compliance challenges surrounding sensitive banking and healthcare traffic.
Hardware-Accelerated Inbound & Outbound Proxy Decryption
4CGuard intercepts SSL/TLS handshakes, validating certificate chains and decrypting the packet payload for inspection by the security engine before re-encrypting the connection with an enterprise certificate authority.
Client initiates TLS handshake with external web server.
4CGuard establishes separate secure sessions with client and server.
Selective bypass evaluation (bypasses banking, healthcare, and trusted government domains).
Payload decrypted into secure memory and inspected by NGFW, IPS, and anti-malware filters.
Stream re-encrypted with enterprise Root CA and delivered with sub-millisecond overhead.
Core technical capabilities
Full TLS 1.3 & 1.2 Protocol Support
Inspects modern TLS 1.3 cipher suites with Perfect Forward Secrecy and Server Name Indication (SNI) verification.
Supports ECDHE, AES-GCM, and ChaCha20-Poly1305 cryptographic primitives.
Privacy & Compliance Bypass Policies
Automatically bypasses decryption for sensitive traffic categories such as financial banking and HIPAA healthcare portals.
Pre-configured compliance exclusion lists with granular administrative overrides.
Certificate Validation & Revocation Checking
Blocks connections using expired, self-signed, revoked, or untrusted upstream SSL certificates.
Real-time OCSP stapling and CRL validation against global certificate authorities.
Hardware Cryptographic Acceleration
Uses hardware crypto offloading to maintain multi-gigabit inspection rates without throttling user connections.
Dedicated CPU cryptographic instruction set acceleration (AES-NI).
Complete Visibility with Respect for Privacy
Shine a light on encrypted attack vectors while maintaining ironclad compliance with organizational privacy standards.
- Stop hidden malware downloads and command-and-control tunnels inside HTTPS.
- Prevent sensitive data exfiltration over encrypted cloud upload channels.
- Preserve employee privacy through automatic financial/medical domain bypasses.
- Enforce strict corporate certificate trust chains across all endpoints.
Real-world use cases
Encrypted Malware Payload Interception
Scenario: An employee unknowingly downloads a macro-enabled malicious document hosted on an HTTPS server.
Outcome: 4CGuard decrypts the HTTPS stream, detects the malware signature, and terminates the transfer.
Inbound Web Server SSL Offloading & Protection
Scenario: An enterprise web portal requires deep inspection of inbound traffic to protect against SQL injection and cross-site scripting.
Outcome: 4CGuard inspects inbound HTTPS requests, filtering malicious attack payloads before forwarding to internal web servers.
Related security engines
Next-Generation Firewall (NGFW)
4CGuard Next-Generation Firewall delivers full-spectrum Layer 7 packet inspection, stateful connection tracking, and zero-trust segmentation to protect enterprise perimeters, branches, and data centers against modern network threats.
Intrusion Prevention System (IPS)
4CGuard IPS delivers high-speed signature matching, protocol anomaly detection, and automated threat neutralization to protect network services against unpatched exploits, remote code execution, and brute-force attacks.
Web Filtering & Content Security
4CGuard Web Filtering provides real-time URL categorization, malicious DNS interception, and granular policy enforcement to protect users against phishing domains, credential harvesters, and non-compliant web content.
Deep SSL/TLS Inspection FAQs
Technical specifications and architecture questions regarding Deep SSL/TLS Inspection.
For outbound client inspection (forward proxy), the enterprise 4CGuard Root CA certificate is installed on managed corporate endpoints via Active Directory Group Policy or MDM.
Evaluate 4CGuard on your network topology
Schedule an architectural walkthrough with a network security engineer. Review Layer 7 inspection rules, encrypted payload decapsulation, and Active Directory policy integration.