net/ttl 0.23.0_1 FreeBSD

Network diagnostic tool that goes beyond traceroute: MTU discovery, NAT detection, route flap alerts, IX identification, and more.

Features:

• Fast continuous path monitoring with detailed hop statistics
• Multiple simultaneous targets - trace to several destinations at once
• Paris/Dublin traceroute - multi-flow probing for ECMP path enumeration
• ECMP classification - distinguishes per-flow vs per-packet load balancing
• Path MTU discovery - binary search for maximum unfragmented size
• NAT detection - identify when NAT devices rewrite source ports
• Route flap detection - alert on path changes indicating routing instability
• Rich enrichment - ASN, GeoIP, reverse DNS, IX detection (PeeringDB)
• MPLS label detection from ICMP extensions
• ICMP, UDP, TCP probing with auto-detection
• Great TUI with themes, sparklines, and session export
• Update notifications - in-app banner when new versions are available
• Scriptable - JSON, CSV, text report, and line-delimited JSON streaming output
• Trace diffing - compare two saved sessions for path and latency changes
• Daemon mode + Prometheus exporter - headless continuous monitoring with /metrics and /healthz
• Docker-ready - official Dockerfile, graceful SIGTERM shutdown