Simulate BGP at Home

Tue, 09 Dec 2025 19:01:48 -0400

Hi everyone,

If you’re like me, there are tons of technologies that you work with on a day-to-day basis, but never have the opportunity to touch. In my day-to-day role, for example, I work heavily with networking and even with BGP. But rarely do I have the chance to do anything BGP-related as it pertains to the internet.

It’s quite the dilemma! How is one supposed to get the experience of operating large-scale networks, if only very few people have the opportunity to work on them? Let alone set them up from scratch!

My NAT Setup for DN42

Wed, 26 Mar 2025 22:24:05 -0400

Hey folks,

Quick tip for anybody using DN42. If you’re having an issue making your services reachable on the network you can copy something similar to what I’m doing.

In my lab, I’m running plain Docker, with a container that has a private IP of 192.168.77.2. To make it reachable from a remote peer over WireGuard, I’m using two NAT rules: one for SNAT and one for DNAT.

Why? Because in the DN42 overlay network, only IPs in the 172.20.0.0/14 range are routable. My little slice is 172.22.147.160/27. The whole setup is similar to your home internet with RFC1918 addresses meaning you need to heavily rely on NAT.

WireGuard on wgz.sh

Simulate BGP at Home

My NAT Setup for DN42