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Konarak
2025-09-30 18:18:38 +00:00
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# sixnix # sixnix
NixOS module for IPv6 networking with WireGuard tunnels and optional BGP failover. IPv6 WireGuard tunnels with optional BGP failover.
## Motivation ## Motivation
My ISP gives me a single `/64` and it's dynamically assigned. Can't have multiple networks with functional autoconfiguration. Tunnel brokers like [Hurricane Electric](https://tunnelbroker.net/) would work but my ISP uses CGNAT which makes that setup tricky if not impossible. They also do not have any exit nodes in the region I want. My ISP gives me a single `/64` and it's dynamically assigned. Can't have multiple networks with functional autoconfiguration. Tunnel brokers like [Hurricane Electric](https://tunnelbroker.net/) would work but my ISP uses CGNAT which makes that setup tricky if not impossible. They also do not have any exit nodes in the region I want.
Linode provides a routed `/56` for free with their cheapest $5/month VPS. That's 256 `/64` subnets. You get 1TB traffic at 1Gbit (40Gbit input but that's kind of irrelevant for our use case). Good enough. Linode provides a routed `/56` and 1TB traffic at 1 Gbit/s for with their cheapest $5/month VPS. That's 256 `/64` subnets.
## Solution 1: Simple WireGuard setup ## Solution 1: Simple WireGuard tunnels
Just a plain WireGuard tunnel to route the `/56` to your home network. Just a plain WireGuard tunnel to route the `/56` to your home network.
@@ -70,11 +70,11 @@ How it works:
- Interfaces get `/64`s from the delegated `/60` with router advertisement enabled - Interfaces get `/64`s from the delegated `/60` with router advertisement enabled
- All traffic from clients goes out to the internet via Linode - All traffic from clients goes out to the internet via Linode
## Solution 2: BGP failover (ultra advanced) ## Solution 2: WireGuard tunnels with BGP for failover
Want redundancy? Run two Linodes in the same datacenter and use BGP to share a single `/56` between them. If one server goes down, BGP automatically fails over to the other. Want redundancy? Run two Linodes in the same datacenter and use BGP to share a single `/56` between them. If one server goes down, BGP automatically fails over to the other.
Cost: $10/month + tax for two Linodes with pooled 2TB bandwidth quota. Cost: $10/month + tax for two Linodes with pooled 2TB traffic quota.
### BGP configuration ### BGP configuration