Using DNS records beyond the owner-published TTL is risky business. You can’t
even know if the same legal entity is providing the content or services
previously published at that address/endpoint, and this uncertainty raises
security and/or liability concerns.
- Kevin
From: Ron [mailto:[email protected]]
Sent: Thursday, March 17, 2016 11:46 AM
To: Darcy Kevin (FCA)
Cc: [email protected]
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. I was
curious if I could tell my DNS servers
to serve these records for longer than the registered ttl. And I wanted to
automate that.
But I'm afraid that's not gonna fly.
Ron
On Thu, Mar 17, 2016 at 4:27 PM, Darcy Kevin (FCA)
<[email protected]<mailto:[email protected]>> wrote:
By “upstream” I assume you’re talking about forwarders. If your forwarders are
flakey, have you ever considered simply *not*forwarding*? That would seem to be
a better, structural solution to your problem, than holding DNS data beyond its
cache-expiration time (a really BAD idea).
- Kevin
[FCA_Pantone_email]
----------------------------------------------------------------------
Kevin Darcy
NAFTA Information Security Projects
FCA US LLC
1075 W Entrance Dr,
Auburn Hills, MI 48326
USA
Telephone: +1 (248) 838-6601<tel:%2B1%20%28248%29%20838-6601>
Mobile: +1 (810) 397-0103<tel:%2B1%20%28810%29%20397-0103>
Email: [email protected]<mailto:[email protected]>
From: [email protected]<mailto:[email protected]>
[mailto:[email protected]<mailto:[email protected]>]
On Behalf Of Ron
Sent: Thursday, March 17, 2016 7:37 AM
To: [email protected]<mailto:[email protected]>
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 servers
that offer this option?
Thanks,
Ron Arts
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