On 09/15/2012 10:34 AM, Gui Iribarren wrote:
On Sat, Sep 15, 2012 at 11:20 AM, Gene Czarcinski <[email protected]> wrote:
On 09/14/2012 03:39 PM, Gene Czarcinski wrote:
I have been trying to get some (virtual) IPv6 networks working with
dnsmasq acting as both an dhcp6 server and a dns server. I really do not
care how the IP6 addresses are assigned but I do want the system names in
dnsmasq's dns service so that these systems can be referred to by name.
At some point in time I had dnsmasq actually handing out IP6 addresses via
dhcp ... or it certainly looked like that since the address was in the range
I specified. That said, I no longer know just what my configuration was.
Basically, I am not sure I understand the meanings or effects of the
various parameters on the dhcp-range specification. Specifically, what
specifying nothing or ra-name or slaac or ra-stateless or ra-only means ..
what are the effects of each are ... or when you combine them what happens.
I have read the dnsmasq man page but I need a little more info. It sure
would be nice to see what a working configuration looked like.
It would be nice if dnsmasq's dns service could be updated regardless of
how the address is specified (other than manually) but if only a subset (or
even one) will work ... well, that works for me too.
Yes, I searched this mailing list and found the messages saying that you
had to specify the fqdn and not just the hostname ... but that was well
after I did a lot of parameter "testing".
My next step is to take a look at the dnsmasq code to see if I can figure
things out but a few pointers and hints would be appreciated.
OK, progress. I have gotten dnsmasq to do the right thing (I belieive) for
IPv6 addresses. However, dns is not updating. I believe the reason for
that is that NetworkManager is not sending the FQDN with the dhcp6 request.
But I still have a question. Reading the man file for dnsmasq I see that
specifying "ra-names" that dnsmasq should go through this dance to do a dns
update. What needs to be specified to get that?
root@host:~# tail -n2 /etc/dnsmasq.conf
enable-ra
dhcp-range=lan, 2001:db8::, ra-names
do note that the ipv6 won't appear in the leases file, but yields
Sep 15 11:19:48 dnsmasq-dhcp[2003]: DHCPREQUEST(br-lan) 10.254.1.56
de:ad:be:ca:fe:ca
Sep 15 11:19:48 dnsmasq-dhcp[2003]: DHCPACK(br-lan) 10.254.1.56
de:ad:be:ca:fe:ca cubito
Sep 15 11:19:48 dnsmasq-dhcp[2003]: RTR-ADVERT(br-lan) 2001:db8::
Sep 15 11:19:48 dnsmasq-dhcp[2003]: SLAAC-CONFIRM(br-lan)
2001:db8:dead:beff:feca:feca cubito
and
root@colmena-gw:~# nslookup cubito
Server: 127.0.0.1
Address 1: 127.0.0.1 localhost
Name: cubito
Address 1: 2001:db8:dead:beff:feca:feca cubito.domain.net
Address 2: 10.254.1.56 cubito.domain.net
Thank you.
That worked as far as getting an IP6 address and updating dnsmasq's dns
db. This demonstrates that what I believed (that dnsmasq was working
properly) is true. Unfortunately, this is not really dhcp6 and it is
not stateful. But, to do that (at least on Fedora) I will need to get
NetworkManager fix so that it sends the fqdn for ipv6 dhcp.
Gene
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