Re: Intermittent NXDOMAIN for a name we are forwarding

2016-02-28 Thread blrmaani
On Sunday, February 21, 2016 at 8:46:19 PM UTC-8, Mark Andrews wrote: > In message <2f868c2b-d04b-4caf-abd7-8176352cc...@googlegroups.com>, blrmaani > wr > ites: > > On Friday, February 19, 2016 at 5:09:02 PM UTC-8, blrmaani wrote: > > > We have a DNS setup where we forward a name in one domain to

Re: Intermittent NXDOMAIN for a name we are forwarding

2016-02-22 Thread Matus UHLAR - fantomas
On 21.02.16 19:07, blrmaani wrote: the cache dump also has this entry (myname.mydomain.com is name I am interested in) myname.mydomain.com 10324 \-ANY ;-$NXDOMAIN Which probably means if anyone requests for myname.mydomain.com, they will be handed NXDOMAIN for upto 10324 seconds from now

Re: Intermittent NXDOMAIN for a name we are forwarding

2016-02-21 Thread Mark Andrews
In message <2f868c2b-d04b-4caf-abd7-8176352cc...@googlegroups.com>, blrmaani wr ites: > On Friday, February 19, 2016 at 5:09:02 PM UTC-8, blrmaani wrote: > > We have a DNS setup where we forward a name in one domain to 5 external nam > eservers. We see NXDOMAIN error intermittently (once in couple

Re: Intermittent NXDOMAIN for a name we are forwarding

2016-02-21 Thread blrmaani
On Friday, February 19, 2016 at 5:09:02 PM UTC-8, blrmaani wrote: > We have a DNS setup where we forward a name in one domain to 5 external > nameservers. We see NXDOMAIN error intermittently (once in couple of weeks). > How do I debug this issue? > > I took a cache dump on our DNS and 2 out of

Re: Intermittent NXDOMAIN for a name we are forwarding

2016-02-20 Thread Mark Andrews
In message <20160220172148.ga26...@fantomas.sk>, Matus UHLAR - fantomas writes: > On 19.02.16 17:08, blrmaani wrote: > >We have a DNS setup where we forward a name in one domain to 5 external > > nameservers. We see NXDOMAIN error intermittently (once in couple of > > weeks). How do I debug this

Re: Intermittent NXDOMAIN for a name we are forwarding

2016-02-20 Thread Matus UHLAR - fantomas
On 19.02.16 17:08, blrmaani wrote: We have a DNS setup where we forward a name in one domain to 5 external nameservers. We see NXDOMAIN error intermittently (once in couple of weeks). How do I debug this issue? tcpdump? I took a cache dump on our DNS and 2 out of 5 nameserver IPs appear in

Intermittent NXDOMAIN for a name we are forwarding

2016-02-19 Thread blrmaani
We have a DNS setup where we forward a name in one domain to 5 external nameservers. We see NXDOMAIN error intermittently (once in couple of weeks). How do I debug this issue? I took a cache dump on our DNS and 2 out of 5 nameserver IPs appear in "Unassociated entries" when the problem happens.