[Dnsmasq-discuss] SOA serial increase

William Edwards wedwards at cyberfusion.nl
Fri Mar 20 11:15:29 GMT 2020


Hi Simon!
> If you don't explicitly set the serial, then it should start at the
> current epoch  time (ie seconds since 1/1/1970) which avoids the problem
> unless you average more than one new DHCP lease per second.
After setting 'auth-server', this behaviour has been 'fixed'.
Without 'auth-server':
--
vlan5.hosts.cyberfusion.space. 600 IN    SOA    . . 1 1200 180 1209600 600
--
With 'auth-server':
--
vlan5.hosts.cyberfusion.space. 600 IN    SOA    vlan5.hosts.cyberfusion.space. hostmaster.vlan5.hosts.cyberfusion.space. 1584702843 1200 180 1209600 600
--
So this seems like a combination of 1) possibly some room for improvement in docs (there is little mention of serials there at all) and 2) working too late at night.
William

On 20/03/2020 08:18, William Edwards wrote:
>
> Op 20 mrt. 2020 om 00:39 heeft Simon Kelley <simon at thekelleys.org.uk
> <mailto:simon at thekelleys.org.uk>> het volgende geschreven:
>
>> On 19/03/2020 17:28, William Edwards wrote:
>>> Hello,
>>>
>>> Does dnsmasq increase SOA serial when adding a new DNS record after DHCP
>>> lease is requested?
>>
>> Yes.
>>
>>>
>>> I am not sure because docs say '--auth-soa' allows for specifying serial.
>>
>> It does, but it's optional: dnsmasq will generate one for you. If you do
>> specify a serial, it will still get incremented after a new DHCP lease
>> is created.
>
> Thanks.
>
> I noticed that serial is reset back to 1 when dnsmasq is restarted. This
> would cause the serial to be lower on dnsmasq than its slaves after a
> restart, even when DHCP leases are handed out and DNS records are added.
>
> Is this intentional behaviour?
>
>>
>>
>> Cheers,
>>
>> Simon.
>>
>>>
>>> Met vriendelijke groeten,
>>>
>>> William Edwards
>>> T. 040 - 711 44 96
>>> E. wedwards at cyberfusion.nl <mailto:wedwards at cyberfusion.nl>
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
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>>
>>
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