#icmp

Build a path with a 1400-byte bottleneck link, send a 1500-byte Don't-Fragment packet into it, and watch ICMP fragmentation-needed teach the sender the Path MTU — the mechanism that silently breaks when firewalls drop ICMP.

Build a real client → r1 → r2 → server path in containers, run traceroute, and capture the ICMP time-exceeded messages that turn a simple loop-prevention field into a hop-by-hop map.

Deep Dive into the Internet: The Anatomy of Network Diagnostics...

Introduction When we talk about the Internet, it's so important that saying "it's used...

Coding ICMP in Rust with TUN/TAP Device

Implementing ICMP in Rust