Application Security
NSFOCUS Web Application Firewall
Cloud and on-premises WAF unifying OWASP, bot, API, and application-layer DDoS protection.
NSFOCUS Web Application Firewall Overview
What it does
NSFOCUS Web Application Firewall is a Web Application and API Protection (WAAP) offering that consolidates OWASP Top 10 defense, bot management, API protection, and application-layer DDoS mitigation behind a single policy engine. Its distinguishing mechanism is a multi-layered detection pipeline that pairs semantic analysis with behavioral modeling and smart patching, pre-filtering traffic and applying customizable detection criteria so both known signatures and emerging attack patterns are caught before they reach the application.
How it works
The platform inspects inbound requests through traffic pre-filtering and semantic analysis, then models user behavior to separate legitimate sessions from malicious automation. Bot defenses issue dynamic tokens and apply obfuscation to block replay and scraping, while API protection uses active and passive discovery to inventory assets, surface shadow APIs, oversee parameters, and flag sensitive-data exposure. Virtual patching mitigates newly disclosed vulnerabilities without code changes. For AI-facing applications, an inline or mirror gateway performs input verification, inference monitoring, and output compliance to counter prompt injection and data leakage. It runs as hardware or virtual appliances and across major public clouds.
Credentials and traction
The NSFOCUS WAF family holds ICSA Labs Web Application Firewall Certification (2021), and NSFOCUS maintains ISO 27001 and ISO 27701:2019 certification covering its information-security and privacy management systems. NSFOCUS was named a Representative Vendor in the 2025 Gartner Market Guide for Cloud Web Application and API Protection. The company serves more than 200,000 customers, including four of the ten largest global telecommunications carriers and major financial institutions.
Key Capabilities
mapped to solution categoriesSignature- and rule-based detection and blocking of common web attacks such as those in the OWASP Top 10.
Machine learning and behavioral analysis to detect anomalous traffic and reduce false positives beyond static rules.
Detection and mitigation of malicious automated traffic and advanced, evasive bots.
Rapid policy-based mitigation of newly disclosed application vulnerabilities without changing application code.
Detection and mitigation of volumetric and application-layer (L7) denial-of-service attacks.
Provides real-time inbound and outbound monitoring and input/output guardrails for AI-powered applications to prevent unauthorized data exposure and unsafe model responses.
Continuously discovers and inventories all APIs across the environment, including shadow and zombie APIs that are not tracked in the official catalog.
Detects and rate-limits automated abuse, credential stuffing, scraping, and misuse of sensitive business flows.
Identifies APIs that transmit or return sensitive data such as personal information, credentials, or tokens, so exposure can be flagged and controlled.
Assesses inventoried APIs for misconfigurations and insecure implementations, such as endpoints that expose sensitive data or lack proper authentication.
Detects and blocks malicious API behavior at runtime using anomaly and behavioral analysis trained on attack patterns.
Compliance
certificationsImplementation & support
Info last updated on August 1, 2026
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