[Dnsmasq-discuss] dnsmasq forwarding unknown ip addresses queries

Simon Kelley simon at thekelleys.org.uk
Wed Sep 5 15:49:37 BST 2012


On 04/09/12 19:41, Gene Czarcinski wrote:
> On 09/04/2012 11:02 AM, Gene Czarcinski wrote:
>> OK, this is similar to my previous questions/issues involving dnsmasq
>> forwarding queries for unknown names for the "name domain" that it is
>> managing (even if that domain name is null).
>>
>> Now the second part.  Whether an instance of dnsmasq is providing a
>> dhcp service or not, is there a way to specify what IP addresses
>> (e.g., 192.168.1.0/24) is should answer and, if dnsmasq does not find
>> that queried ip address in the specified range, then the query should
>> NOT be forwarded?
>>
>> In looking at documentation (but not the code) and not doing any
>> testing yet, I wonder if the following would accomplish what I need:
>>       domain=virt,192.168.100.0/24
>>
>> If that would do the trick, then is there a way to specify that IP
>> address range when the domain name is null (local=//)?
>>
> OK, I believe that I have come up with the answer to my questions.
> 
> Rather than using "--domain virt --local=/virt/", I need to use
> something like:
>       "--domain=virt,192.168.122.0/24,local" or
>       "--domain virt --local=/virt/ --local=/122.168.192.in-addr.arpa/"
> 
> For the case of no domain name, I am not sure that
> "domain=,192.168.122.0/24,local" would work but
>      "--local=// --local=/122.168.192.in-addr.arpa/" should work.
> 
> Comments?
> 

Spot on. Nothing to argue with there.

Simon.





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