As most if not all host OS support IPv6, the easiest way is probably to send an IPv6 ‘empty’ RA (i.e., not pretending to be a router, lifetime = 0, no flags, no PIO, no RIO, ...) that will be picked up by the hosts stack.
About the use of it, you may be aware of https://datatracker.ietf.org/doc/draft-ietf-intarea-proxy-config/ Regards -éric (no hat except co-author of RFC 8801) From: Petr Menšík <[email protected]> Date: Friday, 10 October 2025 at 16:39 To: [email protected] <[email protected]> Subject: [Int-area] How to use RFC 8801 Provisioning domains on IPv4 Hello! I work in Red Hat as a software engineer, working in RHEL on components like dnsmasq and unbound. I would like to improve ability of Linux to use multiple interfaces at the same time, using localhost caching DNS proxy. RFC 8801 provisioning domains allows Router Advertisement messages to contain network identification name. Which in combination with additional TLS verified server name can identify the network I am on. In trusted manner. This is just great and I love it, but I lack similar approach to be used from DHCPv4 server on the same network. Yes, for a common clients and simple networks there would be usually just one DHCP server. I think quite similar DHCP option would be useful also on IPv4 networks. I am especially interested in additional information dnsZones [1] property. Is there a correct way, how should IPv4 only host obtain similar information from network it is connected into? Is there reason, why similar option is not offered over DHCP protocol, both in IPv4 and IPv6 variant? I have some expertise in DNS protocol and understanding of DHCP or RA messages. But I failed to find how exactly the same information can be obtained without Router Advertisement messages. Should be RA message used somehow even on IPv4 protocol? Is this RFC already implemented on any released OS, including IPv4 support? Thank you in advance! Regards, Petr Menšík 1. https://www.rfc-editor.org/rfc/rfc8801.html#name-pvd-additional-information- -- Petr Menšík Senior Software Engieer, RHEL Red Hat, https://www.redhat.com/ PGP: DFCF908DB7C87E8E529925BC4931CA5B6C9FC5CB _______________________________________________ Int-area mailing list -- [email protected] To unsubscribe send an email to [email protected]
_______________________________________________ Int-area mailing list -- [email protected] To unsubscribe send an email to [email protected]
