So, they’re not the least bit embarrassed by their abject inability to provide
reliable authoritative nameservice, eh?
In my experience, partners who have egg on their faces because they’ve recently
caused major outages, tend to be more willing than usual to co-operate on ways
to prevent further outages, and replicating zone data *is* the classic way to
enhance its availability.
(And hopefully you understand that slaving the zone doesn’t require your
nameservers to be published for them, although if you’re a “stealth slave” you
might want to make special arrangements for NOTIFY, as I touched on in my
previous message).
- 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
Mobile: +1 (810) 397-0103
Email: [email protected]
From: [email protected]
[mailto:[email protected]] On Behalf Of Ron
Sent: Friday, March 18, 2016 4:41 PM
To: [email protected]
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)
<[email protected]<mailto:[email protected]>> wrote:
Would they be receptive to letting you slave the zone? At least then you’d have
the whole EXPIRE time before the names stopped resolving.
If they’re concerned about security, then the transfers could be locked down by
source IP address, or, if their software supports it, TSIG key.
One of the downsides of slaving, of course, is that changes might take a while
to replicate, unless NOTIFY is set up.
- 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: Friday, March 18, 2016 4:46 AM
To: G.W. Haywood
Cc: [email protected]<mailto:[email protected]>
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. Haywood
<[email protected]<mailto:[email protected]>> 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 email every
month or so to remind me I'd done that.
This is what we're currently using, but it has the downside of not picking up
ip address changes.
Ron
--
73,
Ged.
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