Travis LaDuke laduke

Routing between two UniFi USG based LANs with ZeroTier

Intro

This is a quick explanation of how to configure both ZeroTier and two Ubiquiti UniFi USGs to allow routing between two IPv4 networks. Both networks are in private (RFC1918) address space and each one has its own DHCP service. There is no need for NAT between them, only IP routing.

The two networks are 192.168.1.0/24 (call this the "left" network) and 192.168.10.0/24 (the "right" network) but they can be anything. Also, you can have multiple CIDR blocks on one side or the other of the ZeroTier route; if you do, you just have to create more routing table entries.

Hey everyone - this is not just a one off thing, there are likely to be many other modules in your dependency trees that are now a burden to their authors. I didn't create this code for altruistic motivations, I created it for fun. I was learning, and learning is fun. I gave it away because it was easy to do so, and because sharing helps learning too. I think most of the small modules on npm were created for reasons like this. However, that was a long time ago. I've since moved on from this module and moved on from that thing too and in the process of moving on from that as well. I've written way better modules than this, the internet just hasn't fully caught up.

@broros

otherwise why would he hand over a popular package to a stranger?

If it's not fun anymore, you get literally nothing from maintaining a popular package.

One time, I was working as a dishwasher in a restu

This was a huge hassle to figure out, so I wrote up a little guide in hopes that others would find it helpful:

How to convince macOS to do IPv6 DNS lookups when your only IPv6 address is via a VPN or tunnel of some sort

The Problem

macOS's domain name resolver will only return IPv6 addresses (from AAAA records) when it thinks that you have a valid routable IPv6 address. For physical interfaces like Ethernet or Wi-Fi it's enough to set or be assigned an IPv6 address, but for tunnels (such as those using utun interfaces) there are some extra annoying steps that need to be taken to convince the system that yes, you indeed have an IPv6 address, and yes, you'd like to get IPv6 addresses back for DNS lookups.

I use wg-quick to establish a WireGuard tunnel between my laptop and a Linode virtual server. WireGuard uses a utun user-space tunnel device to make the connection. Here's how that device gets configured:

Cloud images in Proxmox

A script which automates these steps for multiple distros incl. CoreOS, CentOS, Arch and ALpine

create-cloud-template.sh

Steps for creating an Ubuntu 18.04 cloud template

Using a ready-to-use Ubuntu image

I've designed a lot of RPC protocols in my career. One pattern that's worked well basically goes as follows:

// Client calls: print('Hello World\n')
-> [1, "print", "Hello World!\n"]
// Server sends return value (or lack of return vvalue)
<- [-1]

// Client calls: add(1, 2)
-> [2, "add", 1, 2]

This tutorial was written using Red Hat Fedora 30 but may be similar on other distros.

Discover

You should have an eth0, but if you $ ifconcig -a and don't see it, you should do $ nmcli device status to determine which device is connected to your wifi/ethernet.

Create macvlans and network spaces

$ sudo ip link add macvlan1 link eth0 type macvlan mode bridge
$ sudo ip link add macvlan2 link eth0 type macvlan mode bridge
$ sudo ip netns add net1

canvas-sketch + pen plotter in 3 commands

Install the CLI tool globally:

npm install canvas-sketch-cli -g

Create a new folder and move into it:

How to file a GitHub/Lab issue

Original Medium post

Filing an issue is not about delegating your problem to another developer, it’s about helping maintainers solve issues they haven’t encountered yet.

	even_letters = "bcdfghlmnprstwx"
	odd_letters = "aeiou"

	def format_uid_digit (n, level):
	if n != 0:
	letters = odd_letters if (level & 1) else even_letters
	base = len(letters)
	s = format_uid_digit(n / base, level + 1)
	return s + letters[(n % base)]
	return ""

	Mute these words in your settings here: https://twitter.com/settings/muted_keywords

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