Re: [PATCH] dnsmasq 2.75: next patch... (No.50)

["R. W. Rodolico" <rodo@dailydata.net>]

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Ok. I just want to make sure this is not a local problem.

Am I the only one who is having issues? If so, then all this work has
been for nothing. I was under the impression that there were several
reports of this issue, but if I'm the only one having the problem, then
I'll rebuild the test router (my home office router) and we'll put
effort into something else.

Again, if several people are reporting it, it is something that needs to
be fixed. But if I'm the only one with the issue, then it is probably
*MY* problem, not a problem with something else.

Fred, I agree, it looks like it is a problem with dnsmaq and certain DNS
providers, but I'm using Google and Level 3 for my tests and it fails
every couple of weeks. I'm suspicious of the DNS servers which make
money off their services by putting ads up (which it appears Level 3
does. If you put an invalid domain name up, it comes up with an ad to
purchase it. I have not looked at their traffic patterns to see what it
is, but I had absolute no issues when I was using the German servers.

So, if you think this is a one off, let's get off the issue and I'll
work on *MY* problem.

Let me know.

Rod

On 01/20/2016 12:23 PM, Kienker, Fred wrote:
> The last update to dnsmasq has run fine on all of our IPFire systems 
> with the Google and Level 3 DNS servers for an extended period of time. 
> Could all of the issues be a conflict with the dnsmasq code and 
> *certain* DNS providers? If so this seems like a much harder problem to 
> fix.
> 
> Fred
> 
> -----Original Message-----
> From: Matthias Fischer [mailto:matthias.fischer(a)ipfire.org] 
> Sent: Tuesday, January 19, 2016 2:59 PM
> To: development(a)lists.ipfire.org
> Subject: Re: [PATCH] dnsmasq 2.75: next patch... (No.50)
> 
> Hi,
> 
> On 19.01.2016 08:39, R. W. Rodolico wrote:
>> I installed this package yesterday and dnsmasq broke a few minutes 
> ago.
>> About 24 hours.
> 
> Worked for 24 hours and then crashed? Weird. But thinking of it, this 
> could be one of the reasons why its not crashing *here*. Every 24 hours 
> my ISP cuts the connection, and our router gets a new IP and 'dnsmasq'
> restarts!
> 
>> Strange thing: when I was using the servers you recommended 
>> 84.200.69.80, 84.200.70.40 I did not have any problems even though you 
> 
>> have been updating very frequently. However, I reverted to the old DNS 
> 
>> servers
>> 209.244.0.3 8.8.4.4
>> and in less than a few days (I think I did it with the 15th or 14th 
>> update), it broke again. Those servers are, respectively, 
>> resolver1.level3.net and one of the google ones.
> 
> So as I understand you, its related with the DNS servers you use!? With 
> your ISP servers, it crashes and with the german servers, it doesn't?
> 
>> Let me know if you want me to use the 84 DNS servers. Hell, I may just 
> 
>> decide to build my own caching DNS servers!!!
> 
> Ok, solution found - that was easy... ;-))
> 
> But as long as I'm working on this, I'm more and more sure that these 
> intermediate crashes are really a combination between the DNS servers 
> and 'dnsmasq' itself. Sad to say, I haven't got the (C-)skills to debug 
> this.
> 
> Right now, I'm trying to compile 'dnsmasq' with patches 051-053: it now 
> crashes in 'forward.c' during compilation if I activate the 
> DNSSEC-option (-e 's|/\* #define HAVE_DNSSEC \*/|#define HAVE_DNSSEC|g'
> \). Reason: patch No.053, I think.
> 
> In contrast, the '2.76test6'-version compiles without *any* error, if I 
> delete and disable *all* of our adjustments.
> 
> As Simon wrote: "Conditional combination has a nasty combinatorial 
> explosion. I should hack up a regression test to build all possible 
> variants."
> 
> But obviously this wasn't done yet. If I leave everything as it is, its 
> building...
> 
> Perhaps I'll try another request on the dnsmasq-list during the next 
> days. The last one had no effect, no answers, nothing.
> 
> Best,
> Matthias
> 
> 
> 

-- 
Rod Rodolico
Daily Data, Inc.
POB 140465
Dallas TX 75214-0465
214.827.2170
http://www.dailydata.net