[FujiApple]

This Tailscale blog [1] from 2020 has been posted on HN many times before I’m sure but is worth highlighting again as it does a great job outlining the technical complexities that CGNAT (and NAT in general) introduce.

I have my head in this space at the moment as I’m trying to implement NAT detection (as pioneered by Dublin traceroute [2]) into Trippy [3].

[1] https://tailscale.com/blog/how-nat-traversal-works

[2] https://dublin-traceroute.net/

[3] https://github.com/fujiapple852/trippy/issues/1104

[mcmcmc]

I already love Trippy but that would be an awesome addition! Big thanks from a satisfied user!

[nickburns]

could you say a little bit more about the design and/or purpose of NAT detection in this context? i'm unfamiliar but see what the service generally does in lay terms. curious more about the technical necessity.