Enhancing VoIPmonitor 2026.02.0: Advanced Sensor Monitoring Disk I/O Analytics and PII Masking

1. Advanced Sensor Monitoring and Disk I/O Analytics

1.1 New Disk I/O Monitoring System

The latest release significantly improves disk performance insights through a comprehensive monitoring system, including:

• Automatic Baseline Calibration:
  On startup, the system calibrates disk throughput and latency, detecting external I/O loads to avoid inaccurate baseline measurements. If calibration occurs under load, auto-recalibration triggers once the disk is idle.

• Real-time Metrics:
  Continuous monitoring encompasses disk utilization percentage, capacity relative to the calibrated knee point, throughput (MB/s), IOPS, write latency compared to baseline, and I/O queue depth.

• Saturation Detection:
  The system automatically flags when the disk cannot keep pace with spool writes, with statuses such as DISK_SAT or IO_WARN. Additional indicators include WAIT_CALIB (waiting for idle disk), and RECAL_PEND (pending recalibration).

• Graphical Insights:
  Three RRD graph types provide visual analysis:

  • Disk I/O saturation (% and capacity)
  • Disk throughput (MB/s and IOPS)
  • Latency with queue depth

1.2 Redesigned Sensor Detail Page

The GUI now features a unified sensor detail page, integrating:

• Statistics Dashboard:
  An organized table delivering real-time metrics across calls, CPU, memory, disk I/O, SQL, and system resources.

• Real-time Thread Monitor:
  Live CPU clampdowns with sparkline graphs per thread, sortable by CPU usage, highlighting potential bottlenecks.

• RRD Performance Graphs:
  Period-selectable graphs display CPU load, memory, disk I/O issues, network activity, and packet statistics, enhancing historical analysis and troubleshooting.

1.3 Configuration & Availability

Disk I/O monitoring is enabled by default when spooldir is set, with configurable warning thresholds:

; voipmonitor.conf example
disk_io_monitor = yes
disk_io_warning_threshold = 80
disk_io_saturation_threshold = 95

Available in sniffer versions 2026.01.3+ and GUI versions 2026.1.3+.

2. PII Phone Number Masking and Anonymization

2.1 Masking Modes

VoIPmonitor 2026 offers robust phone number anonymization modes:

• Redact:
  Replaces digits with a character, e.g., XXXXXXXXXXXXX or REDACTED. All masked numbers appear identical, making correlation impossible.

• Hash (Default):
  Uses HMAC-SHA256 with a piih_ prefix to produce consistent, non-reversible tokens for each number, preserving the possibility to perform statistics and filtering.

• Encrypt:
  Applies AES-128-CTR encryption with a secret key (piie_ prefix). It supports reversible anonymization, allowing original numbers to be recovered when necessary, using the secret key.

Mode	Reversible	Correlation	Description
Redact	No	No	Replaces digits with placeholders
Hash	No	Yes	Produces consistent tokens, suitable for analytics
Encrypt	Yes	Yes	Reversible encryption with secret key

2.2 PCAP Anonymization & Configuration

SIP headers in saved PCAP files are masked directly during packet capture. Users can specify headers to mask via:

pii_sip_headers = from; to; contact; p-asserted-identity; p-called-party-id

Caller display names and authorization usernames are anonymized by default, configurable via pii_anonymize_callername and pii_anonymize_username.

2.3 Quick Setup Guide

To enable masking with default hash mode:

pii_enable = yes

For reversible encryption:

pii_enable = yes
pii_masking_secret = your-secret-key-here

2.4 Availability

This functionality is supported in sniffer version 2026.02.0 and newer.

3. Final Remarks and Next Steps

VoIPmonitor’s 2026.02.0 upgrade introduces critical capabilities that enhance performance monitoring and privacy compliance. The new disk I/O analytics enable proactive bottleneck detection, while the robust PII masking ensures organizations can meet privacy standards without sacrificing data utility.

For detailed configuration instructions and to deploy these features, consult the official documentation and support channels. Regular updates and feedback help improve VoIPmonitor’s capabilities further.