[Dnsmasq-discuss] how to stop inappropriate appending of localnet?

[Robert Kean]

This may help... not sure, though, it's late... ;)

http://www.boyce.us/windows/tipcontent.asp?ID=154


-rob

Simon Kelley wrote:

> Grant wrote:
>
>> Hi all,
>>
>> System is dnsmasq 2.20 on slackware-current firewall box, serving a 
>> winxp sp2 client on 192.168.1.31 -- the winxp box also runs privoxy 
>> to filter out popups, javascript, adverts, etc. 
>>
>> Here is an example from the dnsmasq log:
>>
>> Feb  5 11:34:49 deltree dnsmasq[1432]: query 
>> www.itc-electronics.com[A] from 192.168.1.31
>> Feb  5 11:34:49 deltree dnsmasq[1432]: forwarded 
>> www.itc-electronics.com to 203.194.56.150
>> Feb  5 11:34:50 deltree dnsmasq[1432]: query 
>> www.itc-electronics.com[A] from 192.168.1.31
>> Feb  5 11:34:50 deltree dnsmasq[1432]: forwarded 
>> www.itc-electronics.com to 203.194.27.58
>> Feb  5 11:34:50 deltree dnsmasq[1432]: forwarded 
>> www.itc-electronics.com to 203.194.56.150
>> Feb  5 11:34:51 deltree dnsmasq[1432]: query 
>> www.itc-electronics.com[A] from 192.168.1.31
>> Feb  5 11:34:51 deltree dnsmasq[1432]: forwarded 
>> www.itc-electronics.com to 203.194.27.58
>> Feb  5 11:34:51 deltree dnsmasq[1432]: forwarded 
>> www.itc-electronics.com to 203.194.56.150
>> Feb  5 11:34:51 deltree dnsmasq[1432]: query 
>> www.itc-electronics.com.localnet[A] from 192.168.1.31
>> Feb  5 11:34:51 deltree dnsmasq[1432]: config 
>> www.itc-electronics.com.localnet is <NXDOMAIN>-IPv4
>> Feb  5 11:34:51 deltree dnsmasq[1432]: query 
>> www.itc-electronics.com[A] from 192.168.1.31
>> Feb  5 11:34:51 deltree dnsmasq[1432]: forwarded 
>> www.itc-electronics.com to 203.194.27.58
>> Feb  5 11:34:52 deltree dnsmasq[1432]: query 
>> www.itc-electronics.com[A] from 192.168.1.31
>> Feb  5 11:34:52 deltree dnsmasq[1432]: forwarded 
>> www.itc-electronics.com to 203.194.56.150
>> Feb  5 11:34:52 deltree dnsmasq[1432]: forwarded 
>> www.itc-electronics.com to 203.194.27.58
>> Feb  5 11:34:53 deltree dnsmasq[1432]: query 
>> www.itc-electronics.com[A] from 192.168.1.31
>> Feb  5 11:34:53 deltree dnsmasq[1432]: forwarded 
>> www.itc-electronics.com to 203.194.56.150
>> Feb  5 11:34:53 deltree dnsmasq[1432]: forwarded 
>> www.itc-electronics.com to 203.194.27.58
>> Feb  5 11:34:53 deltree dnsmasq[1432]: query 
>> www.itc-electronics.com.localnet[A] from 192.168.1.31
>> Feb  5 11:34:53 deltree dnsmasq[1432]: config 
>> www.itc-electronics.com.localnet is <NXDOMAIN>-IPv4
>> Feb  5 11:35:09 deltree dnsmasq[1432]: query 
>> www.itc-electronics.com[A] from 192.168.1.31
>> Feb  5 11:35:09 deltree dnsmasq[1432]: forwarded 
>> www.itc-electronics.com to 203.194.27.58
>> Feb  5 11:35:09 deltree dnsmasq[1432]: reply www.itc-electronics.com 
>> is 195.46.33.207
>> Feb  5 11:35:09 deltree dnsmasq[1432]: reply www.itc-electronics.com 
>> is 217.117.81.82
>>
>> The problem is the windows box tacking on 'localnet' to what is an 
>> external name, while the original query is still 'in flight'.
>>
>> While dnsmasq is doing the right thing, it certainly is not what is 
>> intended!  And, you can see the manual retry at 11:35:09 succeeded. 
>
>
> The appending of "localnet" is being done by the WinXP client, not 
> dnsmasq, so it can't be stopped by a dnsmasq re-config. As you say, 
> configuring dnsmasq to return "No such domain" to these is the correct 
> thing to do.
>
> You need either faster-responding upstream nameservers, or a longer 
> timeout before the resolver in XP gives up on the first query and 
> starts trying other variations. There's probably a registry entry to 
> control the later, the former is beyond the scope if this reply.....
>
>
>
> Cheers,
>
> Simon.
>
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