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Alfredo Cardigliano

PROFILE

Alfredo Cardigliano

Over an 18-month period, contributed to ntop/ntopng by engineering scalable backend systems, advanced alerting, and robust data processing pipelines. Leveraging C++, Lua scripting, and ClickHouse integration, delivered features such as multi-format export pipelines, poll-based socket I/O, and modular alert management that improved reliability and observability. Refactored core components for maintainability, migrated database backends, and enhanced UI/UX for dashboards and reporting. Addressed concurrency, memory management, and protocol analysis challenges, while implementing automated testing and documentation updates. The work enabled safer deployments, faster analytics, and more efficient operator workflows, demonstrating depth in backend development, system programming, and cross-stack integration.

Overall Statistics

Feature vs Bugs

56%Features

Repository Contributions

897Total
Bugs
251
Commits
897
Features
324
Lines of code
307,650
Activity Months18

Work History

March 2026

40 Commits • 14 Features

Mar 1, 2026

March 2026 delivered a comprehensive set of features, reliability fixes, and UI/UX improvements across ntopng and ntopng-dist, driving better visibility, security, and deployment efficiency. The work enabled more flexible reporting, enhanced time-series telemetry handling, and streamlined distribution/artifacts — all contributing to faster time-to-value for operators and tighter control over environments.

February 2026

36 Commits • 16 Features

Feb 1, 2026

February 2026 (2026-02) performance summary for ntopng: Delivered major exporter enhancements, data history/logging improvements, and stability fixes that strengthen configurability, observability, and reliability across the platform. Focused on business value through expanded reporting, richer historical data, and hardened infrastructure, enabling more accurate monitoring and faster issue resolution.

January 2026

35 Commits • 14 Features

Jan 1, 2026

In January 2026, ntop/ntopng delivered a concise set of feature enhancements, targeted bug fixes, and UI/UX improvements that strengthen monitoring reliability, search accuracy, and operational efficiency. The work emphasizes proactive alerting, cross-interface search capabilities, and deployment readiness, while improving maintainability through code cleanup and documentation tweaks.

December 2025

46 Commits • 25 Features

Dec 1, 2025

December 2025 — ntopng delivered substantial I/O, reliability, and configurability improvements that enhance throughput and stability in high-FD environments, while expanding observability and data-processing capabilities for operators and developers. Key I/O and networking updates include the addition of socket polling utilities (Utils::pollSocket and Utils::pollSockets) and the migration from multi-FD select to a poll-based readiness model, enabling scalable polling across many descriptors with robust fd-count checks. This change reduces latency and CPU usage in high-load scenarios and provides a solid foundation for future network-scale features. Stability and correctness efforts focused on standardizing socket usage with Utils::openSocket, fixing non-blocking connect paths, and tightening interface presence checks (including alias handling) while addressing socket fd leaks and related warnings. pf_ring prefix handling and selective ping-socket behavior were refined to avoid unnecessary activity on alias interfaces. Performance and configurability improvements were delivered through ClickHouse queue tuning options (--dump-queue-len and --dump-queue-block-size) and a parameter-controlled approach to flow purging when ClickHouse is enabled, improving resource utilization and operational predictability. Observability and stats were enhanced via SNMP error handling improvements, diagnostic timing for requests, a centralized OTStats architecture, and expanded S7Comm/Modbus statistics, checks, and alerting to support proactive monitoring and faster issue resolution. Technologies and skills demonstrated include advanced C++ networking (non-blocking IO, poll-based I/O), REST and Lua API extensions, data pipeline tuning with ClickHouse, and robust instrumentation for reliability and performance metrics.

November 2025

56 Commits • 18 Features

Nov 1, 2025

November 2025 milestone: architectural refinements and reliability improvements across ntopng and nDPI, enabling safer deployments, clearer data visibility, and a stronger foundation for upcoming features. Key work includes renaming identifiers for consistency, throughput visualization improvements, modular DHCP/KEA restructuring, DPI processing controls and safety checks, and targeted protocol analysis enhancements in nDPI.

October 2025

56 Commits • 20 Features

Oct 1, 2025

October 2025 performance review: Consolidated stability and data portability improvements across ntopng and nDPI, with a focus on clarity in the bitmap subsystem, robust data handling for serialization, and scalable deployment configurations. Highlights include a system-wide bitmap overhaul for clarity and extensibility, safer import/export workflows, and security-related transport enhancements, alongside bug fixes that reduce crash surfaces and improve shutdown reliability.

September 2025

42 Commits • 14 Features

Sep 1, 2025

September 2025 (ntop/ntopng) focused on delivering user-facing improvements, reliability fixes, and foundational refactoring to enhance maintainability and scalability. The work improved UX, data integrity, and alerting capabilities while strengthening the codebase for faster future delivery.

August 2025

53 Commits • 18 Features

Aug 1, 2025

August 2025 monthly summary for ntop/ntopng. Focused on delivering visible business value through targeted feature work, reliability improvements, and strong maintainability efforts across the codebase. Highlights include documentation improvements, dynamic blacklist capabilities, ZMQ diagnostics enhancements, and comprehensive code cleanup, underpinned by stable fixes.

July 2025

73 Commits • 28 Features

Jul 1, 2025

July 2025 performance focused on delivering user-facing UI/documentation improvements, stabilizing the platform with critical bug fixes, and enabling new capabilities that enhance visibility, collaboration, and enterprise dashboards. The month also included cleanup and refactors to improve maintainability and future velocity, along with updates to distribution artifacts and documentation to reduce support friction and improve on-boarding.

June 2025

44 Commits • 13 Features

Jun 1, 2025

June 2025 performance snapshot: Key backend migration to ClickHouse, multi-format export enhancements, and reliability improvements across ntopng. The team delivered a major database backend migration with API modernization, enabling removal of MySQL dependencies and a unified ClickHouse interface; introduced a parallel, multi-format export pipeline and in-memory import capabilities; extended Lua scripting with CH import mode and improved flow-id propagation; and implemented targeted code cleanups, bug fixes, and observability features to boost reliability and maintainability. These changes reduce data latency, improve scalability, enhance automation, and simplify maintenance while preserving existing external interfaces.

May 2025

61 Commits • 23 Features

May 1, 2025

May 2025 performance summary for ntop/ntopng focused on delivering higher UI consistency, stronger reliability at the edge, and improved data processing and query capabilities. The month combined UI/UX polish, build reliability improvements, and targeted bug fixes with enhancements to data visibility and monitoring.

April 2025

52 Commits • 19 Features

Apr 1, 2025

In April 2025, ntopng and related components delivered notable business value through a mix of feature work, reliability improvements, and documentation enhancements across ntopng and nDPI. Key feature work included advanced data querying and search enhancements, MOS-based QoE integration, plus meaningful UI/UX improvements to dashboards and interface handling. Reliability and security improvements reduced noise and risk, while documentation and process improvements improved developer velocity and onboarding. On the ntop/nDPI side, changes were captured in the v4.14 release notes.

March 2025

79 Commits • 22 Features

Mar 1, 2025

March 2025 Monthly Summary (ntopng and ntop/nDPI) Key features delivered (business value and technical impact): - ntopng: Reporting enhancements – added total as in+out, top applications by ingress/egress, and data volume reporting to improve visibility into network usage and capacity planning. Commits contributing: Set total as in+out; Add Top Applications Ingress/Egress to report; Add data volume to report. - ntopng: Alerts capability enhancements – introduced alerting for Lua-host alerts (set_as_attacker and set_as_victim) to improve incident detection and response. - ntopng: Custom query support for reports – enables custom queries for ingress/egress L7 traffic, expanding analysis flexibility for operators. - ntopng: JA4 fingerprinting and custom queries – added JA4 client fingerprinting and integration of custom queries to strengthen application identification and drill-down analytics. - ntopng: Asset Dashboard Revamp and related endpoint migrations – redesigned the asset dashboard for better UX, added icons/links/titles, and migrated asset endpoints to Pro with updated paths and dashboard endpoints for streamlined maintenance and faster access to assets. - ntop/nDPI: UTF-8 JSON support and safety – implemented UTF-8 encoding in JSON serialization with expanded tests and improved safety in string escaping to enhance data integrity and robustness in multi-language environments. Major bugs fixed (quality, reliability, and performance): - General query stability fixes and query filter/column-name adjustments to improve query results consistency. - UI and data presentation robustness fixes (table JS crash when no sort column; pagination; name display; scale adjustments). - Reliability improvements across distributions and endpoints (dist updates, removal of obsolete components, fix for profiles endpoint path and charts, and epoch handling fixes). - Miscellaneous hardening (MAC-specific UI issue, hyperlink references, and OS type validation updates) to reduce edge-case defects. Overall impact and accomplishments: - Delivered significant improvements in data visibility, incident detection, and analytics flexibility while tightening the build-and-release process through distribution updates and removal of legacy components. The work enhances operator efficiency, reduces mean time to detect/resolve issues, and strengthens the platform's ability to scale with growing data volumes. Technologies/skills demonstrated: - Advanced data reporting design (ingress/egress analytics, data volume metrics) and L7 traffic analysis. - Lua-based alerting enhancements and host-scoped alert logic. - JA4 fingerprinting integration and custom query pipelines. - UI/UX improvements for asset dashboards and Pro migrations. - UTF-8 robust handling in JSON serialization for ntop/nDPI and broad test coverage. - Code maintenance and refactoring (dist management, removal of obsolete components, API and docs improvements).

February 2025

75 Commits • 32 Features

Feb 1, 2025

February 2025 monthly summary: Focused on API stability, infrastructure observability, and data analytics across ntopng and nDPI. Key deliveries include an API Endpoint Update to standardize endpoint semantics and a Template Rename to streamline UI templates. Infrastructure improvements shipped: UI enhancements to hide local badges in the infrastructure view and to extend the infrastructure dashboard with mode widgets, plus distribution artifact updates. Data analytics and monitoring enhancements included: Custom Domain Destination Queries (top domains by destination and count of unique destinations) and the addition of per-direction packets/bytes in historical flows, plus QoE metrics added to reports and dashboards. LDAP Extended Users Capabilities enabling extended user permissions and code cleanup. These workstreams included multiple commits across the ntopng repository and supportive changes in ntop/nDPI. Major bug fixes and reliability improvements completed in this period include stabilizing core components with fixes for netfilter per-direction stats, warning suppression, REST host alert triggers, uninitialized variables, periodic task scheduling, and segfaults, contributing to a safer release cycle.

January 2025

36 Commits • 14 Features

Jan 1, 2025

January 2025 focus: strengthen security/documentation, stabilize runtime behavior, enhance testing, and improve UI/infra dashboards. Delivered business value through clearer licensing/SSL guidance, improved stability, expanded test coverage, and faster, more reliable dashboards with enhanced data handling and navigation.

December 2024

45 Commits • 11 Features

Dec 1, 2024

December 2024 (ntop/ntopng) monthly summary: Delivered a major Flow Alerts overhaul with a core refactor of the Flow alerts pipeline and new bitmap handling utilities, enabling more efficient alert processing. Simplified the alert triggering path by consolidating to a single triggerAlert, reducing code paths and maintenance effort. Reworked alert serialization and introduced protocol-info separation, including a new PROTOCOL_INFO_JSON column, to support multiple alerts and improve data integrity across alerts. Implemented optimization for handling multiple alerts triggered in the same iteration, improving throughput under bursty conditions. Strengthened reliability and concurrency: fixed lifecycle issues (deallocation on alert failure/disable), addressed concurrent access to alerts JSON, and resolved initialization overflow and related edge-case bugs. Also delivered targeted documentation updates for ClickHouse integration and developer notes to improve onboarding and maintenance. Technologies/skills demonstrated include C++ code refactor, Lua scripting improvements, ClickHouse schema and integration work, concurrency improvements, and proactive maintenance with documentation updates.

November 2024

36 Commits • 14 Features

Nov 1, 2024

2024-11 monthly summary for ntop projects focusing on delivering business value through improved alert accuracy, performance, and scalable data architectures. Highlights include Suricata flow collection enhancements, comprehensive in-memory and persisted alert data structures across SQLite and ClickHouse, and UX improvements to enable faster, more reliable operator workflows. Key improvements reduce mean time to detect and respond to incidents, support scalable alerting across environments, and lay foundations for broader analytics. Key outcomes: - Strong improvements in alert accuracy and classification for Suricata-driven flows; NDPI confidence parsing and L7 proto detection implemented during flow collection. - Scalable, unified alert model across databases: in-memory engaged_alerts complemented by SQLite and ClickHouse schemas, plus a consolidated aggregated view, rowid enhancements, and an aggregated page across all alert families. - Performance and efficiency gains: optimized engaged-alert checks to avoid full DB scans by inspecting data up to 1 day prior; streamlined query counting when no results; broader filterability by alert status. - UX and operator efficiency: updated engaged status icon, Ensure engaged alerts appear in Require Attention tab, added alert-status filtering, and a chart annotation feature to aid troubleshooting. - Stability, data integrity, and maintainability: a broad set of schema updates (SQLite and ClickHouse), fixes to timing/serialization issues, and targeted code cleanups (nDPI) to reduce technical debt. Impact: - Faster, more reliable alerting and investigation, reduced database scans, and a scalable data model ready for future analytics and multi-backend deployments. - Clear business value through improved detection accuracy, streamlined workflows, and robust data architecture across ntop/ntopng and ntop/nDPI.

October 2024

32 Commits • 9 Features

Oct 1, 2024

Month: 2024-10 — Concise monthly summary focusing on delivering measurable business value through reliability, scalability, and observability improvements across ntopng and ndpi. Highlights include improved logging and rotation, operational risk reduction via asset-manager toggling, improved host resolution in the absence of a name, advanced DNS filtering/response handling for enhanced network visibility, and JSON serialization enhancements in ndpi.

Activity

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Quality Metrics

Correctness90.6%
Maintainability89.2%
Architecture85.8%
Performance85.4%
AI Usage20.2%

Skills & Technologies

Programming Languages

CC++CSSConfigurationHTMLJSONJavaScriptLuaMakefileMarkdown

Technical Skills

scripting string manipulationAPI DesignAPI DevelopmentAPI IntegrationAPI RefactoringAPI developmentAPI integrationAlert ManagementAlert Management SystemAlertingAlerting SystemsAuthenticationAuthentication SystemsBack End Development

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

ntop/ntopng

Oct 2024 Mar 2026
18 Months active

Languages Used

CC++ConfigurationLuaRSTSQLShelllua

Technical Skills

Backend DevelopmentBug FixBuild System ConfigurationC++C++ DevelopmentClickHouse

ntop/nDPI

Oct 2024 Nov 2025
7 Months active

Languages Used

CMarkdown

Technical Skills

Buffer managementC programmingEmbedded SystemsJSON serializationNetwork Protocol AnalysisProtocol analysis

ntop/ntopng-dist

Feb 2026 Mar 2026
2 Months active

Languages Used

CSSJavaScript

Technical Skills

CSSJavaScriptUI/UX designfront end developmentCSS stylingdata visualization