[Pdns-users] dnsdist drops packet

AleŇ° Rygl ales at rygl.net
Sat Dec 19 15:11:57 UTC 2015


Hi Frederico,

I am experiencig this as well:

showServers()
#   Name                 Address                       State     Qps    Qlim Ord Wt    Queries   Drops Drate   Lat Pools
0   rzt-entdns3          93.153.116.35:53                 up     0.0    1000   1  1    1547610    7186   0.0  72.7 
1   rzt-entdns2          127.0.0.1:53                     up     1.0    1000   1  1    1548253    7379   0.0  81.2 
All                                                              0.0                   3095863   14565   

Could't the drops be caused by downstream server responding too late because of SERVFAIL when resolving a particular domain? 

Regards
Ales


On Saturday 19 of December 2015 13:20:35 Federico Olivieri wrote:
> Hi guys,
> 
> Nobody has any clue for this? I woukd try to understand why dnsdist shows
> some dropped packets. There is any debug that can help me to understand why
> it os happen?
> 
> Thanks and Merry Christmas!!!
> 
> Federico
> 
> On 18 Dec 2015 14:22, "Federico Olivieri" <lvrfrc87 at gmail.com> wrote:
> > Hi all,
> > 
> > I have a raspberry that is running dnsdist with this configuration:
> > 
> > newServer{address="192.168.0.3:53"}
> > newServer{address="127.0.0.1:5300", pool="abuse"}
> > addPoolRule({"wpad.domain.name"}, "abuse")
> > webserver("192.168.0.2:8083", "supersecret")
> > addACL("0.0.0.0/0")
> > addACL("::/0")
> > carbonServer('37.252.122.50', 'raspi-836', 30)
> > 
> > I don't know why, but on webserver I can see some packets dropped from the
> > primary server and I don't understand the reason why. There is not any
> > queries rate for that server
> > 
> > #NameAddressStatusQueriesDropsQPSOutWeightOrderPools0192.168.0.3:53up24108
> > 6720111127.0.0.1:5300up10100011abuse
> > 
> > Do you have any idea why there are some dropped packets?
> > 
> > Also, I added this line of conf. I could see the queries to goolge but I
> > could see also the queries to a.root server. Seems that the command does
> > not overwrite the default one. Is it the aspect  behaviour?
> > 
> > newServer {address="192.168.0.3", checkType="A",
> > checkName="www.google.com.", mustResolve=true}
> > 
> > Last question: I added the carbon server. I can see the server on
> > https://metronome1.powerdns.com/ but no one graph is plotted
> > 
> > Thank you for your time.
> > 
> > BTW, dnsdist seems very useful and powerful!!!
> > 
> > Federico

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