---
description = "End-2-end encrypted IPv6 overlay network"
categories = ["System", "Network"]
features = [ "inventory", "deprecated" ]
---
Mycelium is an IPv6 overlay network written in Rust. Each node that joins the overlay network will receive an overlay network IP in the 400::/7 range.

Features:
- Mycelium, is locality aware, it will look for the shortest path between nodes
- All traffic between the nodes is end-2-end encrypted
- Traffic can be routed over nodes of friends, location aware
- If a physical link goes down Mycelium will automatically reroute your traffic
- The IP address is IPV6 and linked to private key
- A simple reliable messagebus is implemented on top of Mycelium
- Mycelium has multiple ways how to communicate quic, tcp, ... and we are working on holepunching for Quick which means P2P traffic without middlemen for NATted networks e.g. most homes
- Scalability is very important for us, we tried many overlay networks before and got stuck on all of them, we are trying to design a network which scales to a planetary level
- You can run mycelium without TUN and only use it as reliable message bus.


An example configuration might look like this in the inventory:
```nix
mycelium.default = {
  roles.peer.machines = [
    "berlin"
    "munich"
  ];
};
```

This will add the machines named `berlin` and `munich` to the `mycelium` vpn.