[dnsdist] DnsDist Firefox Issue

[bert hubert]

Burak,

Thank you, but this is the place to report your issues:

https://bugzilla.mozilla.org/enter_bug.cgi
and
https://support.google.com/chrome/answer/95315?hl=en

We sadly can't support all software products on the planet from dnsdist ;-)

	Bert


On Fri, Sep 04, 2015 at 09:23:38AM +0300, Burak Ozalp wrote:
> Hi Bert
> 
> Thank you for your interest. Firefox and Chrome DNS operations's
> pcap files are attached.
> 
> Best Regards
> Burak Ozalp
> 
> Alinti bert hubert <bert.hubert at netherlabs.nl>
> 
> >On Thu, Sep 03, 2015 at 02:24:28PM +0300, Burak Ozalp wrote:
> >>Actually, it only works for Ubuntu-Chrome.. In Windows neither
> >>Chrome nor Internet Explorer works with these configuration. What
> >>could be the reason of this situation ?
> >
> >Hi Burak,
> >
> >We estimate that this is an issue that Mozilla and Google might need to take
> >a look at.
> >
> >We asked a friend at Mozilla and he suggests you file a very detailed bug
> >with them, including a tcpdump that shows what happens (UDP query, TC=1
> >response, no followup).
> >
> >On the dns-operations list we also discussed this issue you reported,
> >https://lists.dns-oarc.net/pipermail/dns-operations/2015-September/013637.html
> >where we learned that Firedox 38 at least on one platform does the right
> >thing.
> >
> >	Bert
> >
> >
> >
> >>
> >>Best Regards
> >>Burak Özalp
> >>
> >>Alinti Burak Ozalp <burak.ozalp at metu.edu.tr>
> >>
> >>>
> >>>
> >>>Yes! It works. When we try with the Chrome Browser it responds
> >>>with the TC-bit set and then it automatically retries TCP(looks
> >>>great) . However, when we try with Firefox Browser, it only
> >>>returns the response and not try with TCP.
> >>>
> >>>This is our related configurations;
> >>>
> >>>glibc vesion : 2.13-1
> >>>Kernel version : 3.2.0-68-generic
> >>>Firefox version: 40.0.3
> >>>Chrome version: 43.0.2357.65
> >>>--
> >>>
> >>>Best Regards
> >>>Burak Ozalp
> >>>
> >>>
> >>>
> >>>Alinti bert hubert <bert.hubert at netherlabs.nl>
> >>>
> >>>>On Wed, Sep 02, 2015 at 03:52:11PM +0300, Burak Ozalp wrote:
> >>>>>Our problem is that we don't know the source address. Our aim is the
> >>>>>defence against DDos Attacks, we should limit for all different
> >>>>>IP's. As a result, when an attacker attacks our server, we need to
> >>>>>not drop innocent requests.
> >>>>
> >>>>Ok, then do:
> >>>>
> >>>>addAction(MaxQPSIPRule(5), DropAction())
> >>>>
> >>>>On the latest packages. Limits each individual IP to 5 QPS, drops beyond
> >>>>that.
> >>>>
> >>>>	Bert
> >>>>
> >>>>>
> >>>>>Best Regards
> >>>>>Burak Ozalp
> >>>>>
> >>>>>Alinti bert hubert <bert.hubert at netherlabs.nl>
> >>>>>
> >>>>>>On Wed, Sep 02, 2015 at 02:31:33PM +0300, Burak Ozalp wrote:
> >>>>>>>Hi Bert;
> >>>>>>>
> >>>>>>>AddQPS is the best option for us. Is it possible to apply
> >>>>>>>addQPSLimit for individual IP's ?
> >>>>>>
> >>>>>>Yes, as outlined in the documentation ->
> >>>>>>https://github.com/PowerDNS/pdns/blob/master/pdns/README-dnsdist.md#per-domain-or-subnet-qps-limiting
> >>>>>>
> >>>>>>You can add as many subnets as you want, or individual IPs etc.
> >>>>>>
> >>>>>>Good luck!
> >>>>>>
> >>>>>>	Bert
> >>>>>>
> >>>>>>>
> >>>>>>>Best Regards
> >>>>>>>Burak Ozalp
> >>>>>>>
> >>>>>>>Alinti bert hubert <bert.hubert at netherlabs.nl>
> >>>>>>>
> >>>>>>>>On Wed, Sep 02, 2015 at 02:08:38PM +0300, Burak Ozalp wrote:
> >>>>>>>>>With the current version of RPM i get no error. However,
> >>>>>>>>>addAction(MaxQPSIPRule(5), NoRecurseAction()) , didn't do its job.
> >>>>>>>>>Should we use both addQPSLimit and addAction together for limiting
> >>>>>>>>>indivual IP to 5 qps?
> >>>>>>>>
> >>>>>>>>No, addQPSLimit alone is fine. The addAction is only if you
> >>>>>>>want to drop the
> >>>>>>>>RD-bit for traffic that exceeds the QPS limit.
> >>>>>>>>
> >>>>>>>>	Bert
> >>>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>_______________________________________________
> >>>>>>>dnsdist mailing list
> >>>>>>>dnsdist at mailman.powerdns.com
> >>>>>>>http://mailman.powerdns.com/mailman/listinfo/dnsdist
> >>>>>>>
> >>>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>_______________________________________________
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> >>>>>http://mailman.powerdns.com/mailman/listinfo/dnsdist
> >>>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>>_______________________________________________
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> >>>
> >>
> >>
> >>
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> >>
> >
> 



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