Messages

If there is no Prefix Delegation at all, this is currently the only solution I can think of:

https://docs.opnsense.org/manual/ndproxy.html

But passing a dynamic GUA through like this is not possible since the plugin is standalone and does not hook into any runtime settings, or can change them. Only static configuration works like that right now.

I heard of this plugin, but what are the other downsides to using it? I read it really isn't stable (apparently).
Probably I can use a script that automatically edits the config when my IP changes

I tried this by having the interface aquire the prefix with with
[Interfaces > WAN2] (my ISP only gives be IPv4. Dual Stack isn't possible, so I got a second Internet connection from a different ISP offering IPv6)
IPv6 Configuration Type:        DHCPv6
IPv6 Configuration Type:        DHCPv6

→ DHCPv6 Client Configuration:
  - Prefix Delegation Size:            64
  - Request only the prefix:          (x)
  - Send prefix hint:                        (x)

→ IPv6 Configuration Type: Track Interface
  - Track IPv6 Interface:         WAN

→ Router Advertisements:        Stateless
  - Advertise Default Gateway         (x)
  - DNS:                              2001:4860:4860::8888

When I go to Interfaces/Overview I can see a GUA
https://pasteboard.co/1jDfrwGykfYS.png
For some reason though I'm getting "undefined" under Gateway
https://pasteboard.co/grOL6YoUCCaw.png

Edit: For some reason embedding the screenshots didn't work, so I'll just leave the hyperlinks
Edit2: For some reason it's almost impossible to get a prefix higher than /64 in my country without paying a premium. Even getting IPv6 itself is hard.

Unfortunately it isn't.

Hi everyone,

I'm trying to set up IPv6 on my OPNsense router, but my ISP only provides a single /64 prefix — no prefix delegation (PD), no additional subnets.

My goal is to have all devices in my LAN receive globally routable IPv6 addresses directly from that /64, without using NAT. So far, I can get IPv6 on the WAN interface, but I'm not sure how to properly extend that to the LAN side with just a single /64.

From what I understand, I may need to use something like NDP proxying or bridging, since I can't split the /64 further. Is there a best practice for this kind of setup in OPNsense?

Has anyone done something similar? I'd really appreciate any guidance, configuration examples, or tips.

Thanks in advance!