[Dnsmasq-discuss] Secondary DNS

[Davide Ferrari]

El Miércoles, 24 de Enero de 2007 18:18, Simon Kelley escribió:
> In other words, the server you are sending as secondary may well be used
>  even when the primary is working fine, and the secondary doesn't know
> about the extra hosts that dnsmasq (as DNS server) adds. Those with
> DHCP-allocated addresses, those in /etc/hosts, etc, etc.
>
> So when the secondary is used some host will mysteriously fail to
> resolve, and you're never quite sure when the secondary will be used.

Yeah, I know that "primary dns" and "secondary dns" is a false statement, 
cause the "primary" is the quickest answering server. Anyway my "secondary" 
server it's a Win2003 PDC used for our windows domain and we saw that logon 
performances improved...but probably it's a misconfiguration in the FQDN of 
the win2003 server...it's domain is actually different from our DNS domain 
(whilst in dnsmasq is XXXX.YYY, the win2k3 one is AAA.XXXX.YYY)

> Given that, the answer is (assuming your secondary is at 1.2.3.4)
>
> dhcp-option=6,0.0.0.0,1.2.3.4
>
> DHCP option 6 is the DNS servers, and this replaces the default option 6
> with the the address of the host running dnsmasq (substituted for
> 0.0.0.0) and 1.2.3.4

Thank you for the hint :)

-- 
Davide Ferrari
System Administrator
http://www.atrapalo.com