this post was submitted on 04 Oct 2024
22 points (95.8% liked)

Selfhosted

40173 readers
817 users here now

A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

Rules:

  1. Be civil: we're here to support and learn from one another. Insults won't be tolerated. Flame wars are frowned upon.

  2. No spam posting.

  3. Posts have to be centered around self-hosting. There are other communities for discussing hardware or home computing. If it's not obvious why your post topic revolves around selfhosting, please include details to make it clear.

  4. Don't duplicate the full text of your blog or github here. Just post the link for folks to click.

  5. Submission headline should match the article title (don’t cherry-pick information from the title to fit your agenda).

  6. No trolling.

Resources:

Any issues on the community? Report it using the report flag.

Questions? DM the mods!

founded 1 year ago
MODERATORS
 

I’ve set up subnet routing via Tailscale from my Oracle VPS to my home RPi4. The VPS has a static IPv4 and a /64 IPv6 allocation. I use the VPS to reverse traffic apps on the raspberry using nginx. I would like to take one step forward by tunneling v6 traffic from my home network to WAN, so every client gets its own IPv6 address. What's the best way to tunnel IPv6 traffic from my home network through the RPi4 to the Oracle VPS? I’m also comfortable with messing up my Asus AC86U router to provide publicly routable IPv6 addresses to all clients via DHCP.

you are viewing a single comment's thread
view the rest of the comments
[–] Natanael@slrpnk.net 2 points 1 month ago* (last edited 1 month ago) (1 children)

You need to set up a publicly accessible device (in this case the VPS) as your IPv6 gateway

So you set up your VPN connecting your network to the VPS (should probably be set up from the router) and set your router to advertise an IP adress for the VPS which is routable from your local network as the gateway address (and should probably also run DHCPv6 for your network)

(note, I have not set up this stuff myself so I can't help with implementation details)

[–] hempster@lemm.ee 2 points 1 month ago* (last edited 1 month ago) (2 children)

How do I make the VPS as a gateway device? I see that I can do a static route, but IPv6 gateway is something im unable to understand

[–] oshu@lemmy.world 2 points 1 month ago

I don't think you can do this with routing because IPv6 doesn't support splitting a /64 into subnets. Might work via virtual bridging over a vpn link. I don't think tailscale supports layer 2 tunneling so you would need to use something else.

[–] 2xsaiko@discuss.tchncs.de 2 points 1 month ago

What they suggest sounds like setting up a bridge interface between your LAN and the VPN interface to connect the VPS with your LAN. That’s actually a good idea since it would not need you to have a separate /64 for your local network. In this case I’m pretty sure that your VPN needs to be a layer 2 VPN, i.e. transports whole ethernet frames instead of TCP/UDP only, for this to work correctly. Wireguard doesn’t do this, OpenVPN can for example.

To make the VPS a gateway, you need to configure it to forward packets between networks and then set it as your default route on the clients (with IPv6, default route is usually published using router advertisements, set up radvd service on your VPS for that). That’s pretty much it IIRC except for the firewall rules. Here’s an article that’s some cloud stuff but is also applicable to your situation: https://www.linode.com/docs/guides/linux-router-and-ip-forwarding/#enable-ip-forwarding