Whoops, some of my example config was wrong. ra-param=eth0,mtu:6in4,60 # "0" would disable periodic sending, and Apple's OSes would drop the address without soliciting for the router again.
MZ On Mon, 5 Aug 2019 at 22:40, Michal Zatloukal <myxal....@gmail.com> wrote: > > Hi there. > > On Fri, 2 Aug 2019 at 18:21, Knud <knud.skr...@guldberg.info> wrote: > > > > Hi > > > > I have tried to get IPv6 setup running for my internal LAN (at home) > > > > With a lot of tries and no really luck. > > > > What do I want: > > > > Have dnsmasq running on a server (Linux fedora f30), do Ipv6 DHCP/DNS > > with local names. > > Where is the DHCPv4 server running? ra-names assumes the same instance > of dnsmasq is running both DHCPv4 and v6. > Personally, I haven't been able to get local names to work with IPv6 > even in that configuration. The assumption of hosts using EUI-64 is > not met too often these days. > > > Want to proceed that for IPv6, let my router make a IPv6 tunnel to a HE > > tunnelbrooker. > > Are server (DHCPv6) and router (6-in-4 tunnel) 2 different hosts? RAs > must be sent by the host acting as the gateway, there's no way around > this in IPv6 AFAIK. You must configure the gateways's RAs to enable > clients to look for DHCPv6 server (M, O bits set to 1). > > > > > Right now I how made a test setup consisting of 2 Vbox guest (Fedora > > F30) running in internal network on the Vbox host just to get things > > working and learn. > > > > So first step is get dnsmasq hand out a IP address and register it in > > the DNS. > > Hold it - Do you have an address from the specified range (fd17:...) > manually assigned to the interface on the DHCP server? (Not sure if > it's necessary, but that's what I did) - if you don't, I could see how > dnsmasq would consider the range non-local (see below) > > > 1st problem: Client get correct address from dnsmasq but not the right > > mask eg. it get's an IP /128 > > enable-ra is there > > IIRC "/128" happens when the prefix is not flagged as on-link in its > options. Check the advertisements with tcpdump/wireshark/rdisc6. As > for cause, you config doesn't specify prefix length so the correct > length must be set on the interface. > > > 2nd problem: Client get DNS ip from the fe80:: adress range > > If you mean "the DNS server address the client gets is in the > fe80::/10 range", then this is normal. > > > 3th problem: the adress which registered in the dns is the fe80:: adress > > Not sure where this comes from (are you sure this is provided by > dnsmasq, rather than avahi/mDNS/LLMNR?). If I'm reading the manual > correctly - ra-name only intended for SLAAC-enabled networks, and even > then only works with hosts that don't do private interface > identifiers. So you won't get name resolution to your fd17... range > regardless. Just to check - set loq-query and see if it's actually > dnsmasq responding to the query. The leases file might also be > helpful. > > > I could write a long story about what I have tried.... > > > > Please advise.. > > OK. From your config: > > > dhcp-range=fd17:625c:f037:a80f::10, fd17:625c:f037:a80f::ffff, ra-names > > According to the manual, omitting the prefix length will cause dnsmasq > to use prefixlen of the interface. As noted above - is this set? > > As for me - I'm still on debian with ifupdown, so I do it this way (my > HE tunnel endpoint is on a host behind NAT, rather than on the v4 > router, but that host also does DHCPv4 so I can do ra-names; 6in4 > requires that router is configured to treat this host as DMZ): > > 1. /e/n/i for eth0: > iface eth0 inet static > ... # Private IPv4 config > up ifup 6in4 > down ifdown 6in4 > iface eth0 inet6 manual > > 2. /e/n/i for the tunnel: > iface 6in4 inet6 v4tunnel > ... # Endpoint addresses > up ip route add ::/0 dev 6in4 > up ip add add 2001:.../64 dev eth0 # internal ip6 range > down ip route del ::/0 dev 6in4 > down ip add del 2001:../64 dev eth0 > > 3. dnsmasq for v6: > dhcp-range=::,constructor:eth0,ra-names > ra-param=eth0,mtu:6in4,0 > > I'm not sure how/if dnsmasq can do DHCPv6-only assignment, but google > search results suggest a range like this should get you going: > dhcp-range=::1, ::FFFF:FFFF, constructor:br*, 64, 12h > > I would suggest you start with the easier SLAAC setup, then tweak it > once you have that running. > > MZ > > > Knud > > _______________________________________________ > > Dnsmasq-discuss mailing list > > Dnsmasqemail@example.com > > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss _______________________________________________ Dnsmasq-discuss mailing list Dnsmasqfirstname.lastname@example.org http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss