ttl – modern traceroute

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

This is free and open source software.

Features include:

• 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.
• 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.
• Scriptable – JSON, CSV, and text report output.

Website: github.com/lance0/ttl
Support:
Developer: lance
License: MIT License or Apache License 2.0

ttl is written in Rust. Learn Rust with our recommended free books and free tutorials.

Alternatives to traceroute

Explore Linux
	Best Free and Open Source Software - A huge collection of recommended free and open source software covering every major category.
	In-depth Linux Software Reviews - Detailed assessments of Linux software covering features, usability and overall quality.
	The Big List of Active Linux Distros - An extensive collection of actively developed Linux distributions.
	Open Source Alternatives - Alternatives to software and services from Google, Microsoft, Apple, Adobe, IBM, Autodesk, Oracle and others.
	Essential Linux System Tools - Indispensable utilities for monitoring, maintaining and managing Linux systems.
	Linux Productivity Tools - Useful utilities for improving productivity and streamlining everyday tasks.
	Alternatives to Popular CLI Tools - Modern alternatives to familiar command-line utilities supplied with Linux systems.
	Awesome Free Linux Game Tools - Tools, utilities and companion software that improve gaming on Linux.
	Machine Learning on Linux - Machine learning and deep learning software, self-hosted applications and practical tools.
	Saving Money with Linux - Practical ways to reduce electricity consumption and lower computing costs with Linux.
	Linux Candy - Fun, entertaining and sometimes delightfully quirky software from the lighter side of Linux.