[Dnsmasq-discuss] Ignore certain returned DNS response?

Simon Kelley simon at thekelleys.org.uk
Tue Oct 14 18:22:58 BST 2014


On 10/10/14 03:28, microcai wrote:
> 在 2014年10月8日 星期三 20:13:33,Glen Huang 写道:
>> Is it possible to ask dnsmasq to ignore DNS responses whose records match a
>> certain list of ip, and keep waiting for another response?
>>
>> The rational behind this is that in China, when querying a domain like
>> youtube.com or twitter.com, a fake ip is quickly returned, fooling dnsmasq
>> to discard the genuine response that comes after it. Luckily the returned
>> fake ips are of a limited set. So it’s relatively easy to distinguish such
>> bogus responses.\
> 
> Yet Another reason is the so-called 114la. when you request an Domain name 
> that do not exist, the ISP will return an fake webserver and you'll have to 
> see advertisments. That sucks.
> 
> the fake server address is always the same "60.191.124.236" here.

That's what --bogus-nxdomain is for


bogus-nxdomain=60.191.124.236

and when the ISP returns 60.191.124.236 it gets turned back into
NXDOMAIN. Magic!


Cheers,

Simon.

> 
>>
>> I can’t find an option which does this in the man page. So this might be a
>> feature request. I guess it should work like the bogus-nxdomain option, but
>> instead of treating the ip as nxdomain, dnsmasq would ignore it, and keep
>> wait for another response.
>>
>> I’m willing to take a stab at this feature (it could take some time though,
>> since I’m not familiar with the internels of dnsmasq). But before doing so,
>> I want to make sure that I didn’t missing any option that already does that
>> and this feature does belong to dnsmasq.
>>
>> Thank you.
> 
> 
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