Dynamic DNS with secondary nameserver?

[Sten Carlsen]

How did you tell the primary server who to notify?

It should be listed in a NS RR. You can also look at the also-notify 
option.

Is the slave allowed to transfer the zone, if not even a notify will not
work.


On 01/12/10 21:09, Sean Thomas Caron wrote:
> Hi folks,
>
> We have an ISC DHCP server here feeding dynamic DNS updates to a BIND
> 9 machine and it has generally been working fine.
>
> Now I am trying to add a slave nameserver to the zone and it works
> fine for the static hosts but none of the dynamic DNS updates seem to
> propagate to the slave.
>
> On the master, I have the dynamic sub-domain configured as follows:
>
> zone "ddns.sph.umich.edu" in {
>     type master;
>     file "/etc/bind/ddns.sph.umich.edu.hosts";
>     notify yes;
>     allow-update { key dhcpupdate; };
> };
>
> This works great; the DHCP server feeds updates to the primary DNS
> server, no problem.
>
> On the slave, I set it up as so:
>
> zone "ddns.sph.umich.edu" in {
>     type slave;
>     masters { 141.211.51.166; };
>     notify no;
>     file "/etc/bind/ddns.sph.umich.edu.hosts";
> };
>
> When a host comes up on DHCP, the primary server picks it up fine:
>
>> server 141.211.51.166
> Default server: 141.211.51.166
> Address: 141.211.51.166#53
>> sph-2006-0090-test.ddns.sph.umich.edu
> Server:        141.211.51.166
> Address:    141.211.51.166#53
>
> Name:    sph-2006-0090-test.ddns.sph.umich.edu
> Address: 141.211.11.190
> sph-2006-0090-test.ddns.sph.umich.edu    text =
> "31ce446f626045a4f8fe4933f448b613c6"
>>
>
>
> But it never seems to propagate over to the slave:
>
>> server 141.211.51.66
> Default server: 141.211.51.66
> Address: 141.211.51.66#53
>> sph-2006-0090-test.ddns.sph.umich.edu
> Server:        141.211.51.66
> Address:    141.211.51.66#53
>
> ** server can't find
> sph-2006-0090-test.ddns.sph.umich.edu.sph.umich.edu: SERVFAIL
>>
>
> I used 'rndc freeze' on the DDNS sub-domain then edited the zone file
> to have a really short refresh interval:
>
> ddns.sph.umich.edu    IN SOA    dns.sph.umich.edu.
> hostmaster.sph.umich.edu. (
>                 2007024409 ; serial
>                 3600       ; refresh (1 hour)
>                 1800       ; retry (30 minutes)
>                 2419200    ; expire (4 weeks)
>                 86400      ; minimum (1 day)
>                 )
>
>
> Then re-enabled it with 'rndc unfreeze' but it still doesn't seem to
> have made a difference. Even after waiting an hour, the additions to
> the dynamic DNS zone never propagate to the slave. I'm not even sure
> if those values are honored when dynamic DNS is enabled.
>
> Most sites that I have seen discussing dynamic DNS only use one DNS
> server, so I am not exactly sure how this should be set up, or if this
> was ever intended to work this way. Is it possible? Or should I just
> make only the master a NS for the dynamic subdomain and leave the
> slave for static stuff only?
>
> I feel like if it was going to work, I have it set up correctly..
>
> Thanks,
>
> -Sean
>
>
> _______________________________________________
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> bind-users at lists.isc.org
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-- 
Best regards

Sten Carlsen

No improvements come from shouting:

       "MALE BOVINE MANURE!!!" 

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