Messages

My WAN interface configuration:
- DHCPv6
- Only request IPv6 prefix
- Sent Prefix Hint
- IPV6 Privacy Extensions enabled

OPNsense 24.7.11_2-amd64

My reading of the code is that in this case it would use the link-local address as you have seen.  It looks as if setting the 'Optional prefix ID' under Settings > WAN > DHCPv6 may cause it to use the GUA, if that's something you can try (i.e. if the prefix for your ISP is bigger than /64 and you can assign a /64 to your WAN interface).

This is exactly the behavior that I can reproduce. The workaround with "Optional prefix ID" has helped.

Without set "Optional prefix ID":

Code Select Expand

> cat /var/unbound/unbound.conf | grep outgoing-interface

outgoing-interface: 192.168.0.2
outgoing-interface: fe80::e63a:6eff:fe61:cbe0%lagg0_vlan4001

With set "Optional prefix ID":

Code Select Expand

> cat /var/unbound/unbound.conf | grep outgoing-interface

outgoing-interface: 192.168.0.2
outgoing-interface: 2a02:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:cbe0

Version: 25.1.10
Architecture: amd64
Commit: 0b8e414bf