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.
Exploit Windows & Fast-Moving Network Vulnerabilities
Between the public disclosure of a software vulnerability and the deployment of patches across internal systems, enterprise networks remain vulnerable to automated exploit scripts, ransomware worm propagation, and brute-force attacks.
Prolonged vulnerability windows due to slow endpoint and server patching cycles.
High false-positive rates in legacy intrusion detection systems overwhelming security operations teams.
Evasion techniques such as packet fragmentation and payload obfuscation bypassing simple pattern matchers.
Multi-Stage Behavioral & Signature Threat Engine
Network streams are reassembled in memory and evaluated against continuously updated vulnerability signatures and protocol normalization decoders, dropping malicious packets inline before they reach host servers.
Stream de-fragmentation and protocol normalization to defeat evasion attempts.
Contextual pattern matching against known CVE exploit signatures.
Heuristic anomaly detection evaluating rate thresholds and illegal state transitions.
Automated inline packet dropping with dynamic TCP reset injection.
Real-time alert dispatch to SIEM and centralized audit logs.
Core technical capabilities
CVE Vulnerability Signatures
Comprehensive database of exploit signatures covering critical enterprise software, operating systems, and network services.
Regular rule updates covering emerging zero-day vulnerabilities and remote code execution exploits.
Protocol Anomaly Detection
Identifies non-RFC compliant protocol behaviors, malformed headers, and illegal state transitions.
Strict protocol decoders for HTTP, DNS, TLS, SMB, SSH, and RDP.
Anti-Evasion Normalization
Reassembles fragmented packets and decodes URL/hex-encoded payloads before inspection.
TCP stream reassembly engine resistant to overlapping fragments and timing attacks.
Automated Rate-Based Protection
Mitigates brute-force attacks, port scanning, and SYN flood attempts with automated rate throttling.
Sliding-window IP connection rate tracking with automated temporary quarantine.
Virtual Patching & Immediate Attack Neutralization
Shield mission-critical servers and workstations from active exploits without waiting for emergency patching maintenance windows.
- Implement instant virtual patching against disclosed vulnerabilities.
- Neutralize automated reconnaissance and port scanning before exploitation begins.
- Drastically lower false positives using contextual inspection algorithms.
- Maintain detailed forensic event captures for incident response teams.
Real-world use cases
Virtual Patching for Legacy Infrastructure
Scenario: A company operates legacy enterprise database servers that cannot be immediately updated during production hours.
Outcome: 4CGuard IPS inspects database traffic and drops known exploit payloads targeting unpatched vulnerabilities.
Brute-Force & Scan Mitigation
Scenario: An internet-facing SSH/VPN gateway is subjected to high-frequency credential stuffing and automated vulnerability scanners.
Outcome: IPS automatically detects anomalous connection frequencies and temporarily bans offending IP subnets.
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.
Real-Time Threat Intelligence
4CGuard Threat Intelligence continuously ingests global security telemetry, malicious IP/domain reputation scores, and zero-day indicators of compromise (IOCs) to dynamically protect your network before attacks materialize.
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.
Intrusion Prevention System (IPS) FAQs
Technical specifications and architecture questions regarding Intrusion Prevention System (IPS).
An Intrusion Detection System (IDS) only monitors and alerts on suspicious traffic. 4CGuard operates as an active inline Intrusion Prevention System (IPS), meaning it actively drops malicious packets and terminates attacker connections in real time.
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.