Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-26 Thread Barry Margolin
In article , Ron wrote: > Barry, > > On Sat, Mar 26, 2016 at 3:13 AM, Barry Margolin wrote: > > In article , > > John Wobus wrote: > > > >> On Mar 18, 2016, at 6:28 AM, Barry Margolin wrote: > >> > In article , > >> > Mark Andrews wrote: > >> > > >> >> How do you actually expect this to ev

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-26 Thread Ron
Barry, On Sat, Mar 26, 2016 at 3:13 AM, Barry Margolin wrote: > In article , > John Wobus wrote: > >> On Mar 18, 2016, at 6:28 AM, Barry Margolin wrote: >> > In article , >> > Mark Andrews wrote: >> > >> >> How do you actually expect this to ever work in real life? >> > >> > I'm pretty sure G

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-25 Thread Barry Margolin
In article , John Wobus wrote: > On Mar 18, 2016, at 6:28 AM, Barry Margolin wrote: > > In article , > > Mark Andrews wrote: > > > >> How do you actually expect this to ever work in real life? > > > > I'm pretty sure Google DNS does this. Other resolver operators often get > > complaints ab

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-25 Thread Warren Kumari
On Fri, Mar 25, 2016 at 12:49 PM John Wobus wrote: > On Mar 18, 2016, at 6:28 AM, Barry Margolin wrote: > > In article , > > Mark Andrews wrote: > > > >> How do you actually expect this to ever work in real life? > > > > I'm pretty sure Google DNS does this. Other resolver operators often get >

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-25 Thread John Wobus
On Mar 18, 2016, at 6:28 AM, Barry Margolin wrote: > In article , > Mark Andrews wrote: > >> How do you actually expect this to ever work in real life? > > I'm pretty sure Google DNS does this. Other resolver operators often get > complaints about "Why can't I look up through your DNS > serv

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-21 Thread Dave Warren
On 2016-03-19 19:03, Barry Margolin wrote: In article , Dave Warren wrote: My current logic is that I do a SOA query and check the serial number, if it has changed, I query every needed hostname into a temp file, and if every single query was successful, check the SOA again, and if it still

RE: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-20 Thread Darcy Kevin (FCA)
[mailto:bind-users-boun...@lists.isc.org] On Behalf Of Ron Sent: Friday, March 18, 2016 4:46 AM To: G.W. Haywood Cc: bind-users@lists.isc.org Subject: Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive On Fri, Mar 18, 2016 at 12:12 AM, G.W. Ha

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-20 Thread Ron
On Sun, Mar 20, 2016 at 3:03 AM, Barry Margolin wrote: > > That's feasible if you can reconfigure all the client machines to do > this. It's not very scalable if you have a network of machines running > different operating systems, and you'd like to have your central > resolver take care of all th

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-20 Thread Barry Margolin
In article , Mark Andrews wrote: > How do you actually expect this to ever work in real life? I'm pretty sure Google DNS does this. Other resolver operators often get complaints about "Why can't I look up through your DNS servers when I can do it through Google DNS?" > Caches will generally

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Ron
rom:* bind-users-boun...@lists.isc.org [mailto: > bind-users-boun...@lists.isc.org] *On Behalf Of *Ron > *Sent:* Thursday, March 17, 2016 7:37 AM > *To:* bind-users@lists.isc.org > *Subject:* Can bind be configured to not drop RR's from the cache when > the upstream DNS server

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Barry Margolin
In article , Dave Warren wrote: > My current logic is that I do a SOA query and check the serial number, > if it has changed, I query every needed hostname into a temp file, and > if every single query was successful, check the SOA again, and if it > still matches, update the /etc/hosts. If a

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Mark Andrews
, and this > > uncertainty raises security and/or liability concerns. > > > > > > > > > > - Kevin > > > > > > > > > > > > *From:* Ron [mailto:ron.a...@gmail.com] > > *Sent:* Thursday, March 17, 2016 11:46 AM > > *To:* Darcy Kevin (FCA

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Anders Löwinger
On 2016-03-18 00:12, G.W. Haywood wrote: I'd just put something in /etc/hosts and send myself an email every month or so to remind me I'd done that. I once wrote a script that periodically did zonetransfer, parsed output and updated the /etc/hosts file. /Anders __

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Alan Clegg
On 3/17/16, 10:15 AM, "Ron" wrote: > According to the BIND9 docs: > > cleaning-interval This interval is effectively obsolete. Previously, the >server would remove > expired resource records from the cache every cleaning-interval minutes. >BIND 9 now > manages cache memory in a more sophisticat

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Ron
On Fri, Mar 18, 2016 at 9:43 AM, Ron wrote: > > How about a list of domains for which cached RRs will not be purged > _unless_ a different RR is supplied by the 'upstream' server? > Or, with Barry Margolin's comments in mind, a dynamic list, which is compiled from the domains that are accessed, s

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread G.W. Haywood
Hi there, On Thu, 17 Mar 2016, Ron wrote: ... in this case it's a supplier who is unable to keeps his DNS servers working, and we just want to keep the connectivity. I'd just put something in /etc/hosts and send myself an email every month or so to remind me I'd done that. -- 73, Ged. ___

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Barry S. Finkel
On 3/17/2016 12:36:31 +0100 Ron wrote: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive? Hi, subject says all. Read manpages, could not find this in the FAQ's. Hope this is possible. If not does anyone know of other name servers

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Ron
rcy > NAFTA Information Security Projects > > > > FCA US LLC > > 1075 W Entrance Dr, > > Auburn Hills, MI 48326 > > USA > > > > Telephone: +1 (248) 838-6601 > Mobile: +1 (810) 397-0103 > > Email: kevin.da...@fcagroup.com > > > > *From:

Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Ron
Hi, subject says all. Read manpages, could not find this in the FAQ's. Hope this is possible. If not does anyone know of other name servers that offer this option? Thanks, Ron Arts ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to un

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Ron
On Thu, Mar 17, 2016 at 2:51 PM, Barry S. Finkel wrote: > On 3/17/2016 12:36:31 +0100 Ron wrote: > > Can bind be configured to not drop RR's from the cache when >>> the upstream DNS server is unresponsive? >>> >> > Hi, >> >> subject says

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Ron
Dave, On Sat, Mar 19, 2016 at 6:02 AM, Dave Warren wrote: > On 2016-03-18 01:46, Ron wrote: > > > On Fri, Mar 18, 2016 at 12:12 AM, G.W. Haywood > wrote: >> >> Hi there, >> >> On Thu, 17 Mar 2016, Ron wrote: >> >>> ... in this case it's a supplier who is unable to keeps his DNS servers >>> worki

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Ron
On Fri, Mar 18, 2016 at 12:12 AM, G.W. Haywood wrote: > Hi there, > > On Thu, 17 Mar 2016, Ron wrote: > > ... in this case it's a supplier who is unable to keeps his DNS servers >> working, and we just want to keep the connectivity. >> > > I'd just put something in /etc/hosts and send myself an e

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-19 Thread Ron
MI 48326 > > USA > > > > Telephone: +1 (248) 838-6601 > Mobile: +1 (810) 397-0103 > > Email: kevin.da...@fcagroup.com > > > > *From:* bind-users-boun...@lists.isc.org [mailto: > bind-users-boun...@lists.isc.org] *On Behalf Of *Ron > *Sent:* Friday, March 18, 20

Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-18 Thread Dave Warren
On 2016-03-18 01:46, Ron wrote: On Fri, Mar 18, 2016 at 12:12 AM, G.W. Haywood mailto:b...@jubileegroup.co.uk>> wrote: Hi there, On Thu, 17 Mar 2016, Ron wrote: ... in this case it's a supplier who is unable to keeps his DNS servers working, and we just want

RE: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-18 Thread Darcy Kevin (FCA)
, 2016 7:37 AM To: bind-users@lists.isc.org Subject: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive Hi, subject says all. Read manpages, could not find this in the FAQ's. Hope this is possible. If not does anyone know of other name se

RE: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-18 Thread Darcy Kevin (FCA)
Subject: Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive I did not mean forwarders, but I had a case where the authoritative name servers for a domain were down for an extended period of time, exceeding the ttl for their records.

RE: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

2016-03-18 Thread Darcy Kevin (FCA)
18, 2016 4:41 PM To: bind-users@lists.isc.org Subject: Re: Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive Slave the zone? Oh, run secondary. Fat chance. Ron On Fri, Mar 18, 2016 at 5:03 PM, Darcy Kevin (FCA) mailto:kevin.da...@fcagrou