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The NSS-rated IPS blocks known and unknown vulnerability exploits, buffer overflows, DoS attacks and port scans from compromising and damaging enterprise information resources. IPS mechanisms include:
- Protocol decoder-based analysis statefully decodes the protocol and then intelligently applies signatures to detect vulnerability exploits.
- Protocol anomaly-based protection detects non-RFC compliant protocol usage such as the use of overlong URI or overlong FTP login.
- Stateful pattern matching detects attacks across more than one packet, taking into account elements such as the arrival order and sequence.
- Statistical anomaly detection prevents rate-based DoS flooding attacks.
- Heuristic-based analysis detects anomalous packet and traffic patterns such as port scans and host sweeps.
- Custom vulnerability or spyware phone home signatures that can be used in the either the anti-spyware or vulnerability protection profiles.
- Other attack protection capabilities such as blocking invalid or malformed packets, IP defragmentation and TCP reassembly are utilized for protection against evasion and obfuscation methods employed by attackers.
Traffic is normalized to eliminate invalid and malformed packets, while TCP reassembly and IP de-fragmentation is performed to ensure the utmost accuracy and protection despite any attack evasion techniques.
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