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[tool] octomon: a terminal network monitor to analyse your Internet connection


From: Simon Thorpe via NANOG <nanog () lists nanog org>
Date: Sun, 25 Oct 2026 05:19:51 +0000

Hi all,

I'm Simon and I work at Cloudflare. I have leaned on the NANOG archives for years when chasing odd behaviour between a 
host and the wider internet, so I wanted to give something back and share a tool I built, in case it is useful to 
anyone here or to the people you support.

https://octomon.dev

octomon is an open-source terminal dashboard for the end-host view of a connection: per-target latency, loss and 
jitter, per-process and per-remote bandwidth, Wi-Fi signal, resolver health, path MTU, clock offset, and the ISP path 
from traceroute.

I was sick of running a load of separate tools and scripts, piecing together the information to determine what was 
going on with my Internet connectivity. I also wanted to learn Rust, so this was a chance to tidy up all the scripts 
I've built over the past 30 years into a single cli tool for helping me diagnose my device to Internet connectivity.

Quick video of me walking through it here... https://www.youtube.com/watch?v=ECwBaSvUwfk

Thanks,

Simon
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