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Name Servers are on the Same Subnet
| Posted by PTomas, 09-27-2014, 09:36 AM |
| Hi
MXTOOLBOX is my new best buddy.
I appreciate this idea, would anyone be willing to share their thoughts on this? I have a Fully Managed Cloud hosting.
MXTOOLBOX:
dns mydomain.org.uk Name Servers are on the Same Subnet
REF: mxtoolbox.com/problem/dns/DNS-Servers-are-on-Different-Subnets
Hosting reply:
This warning is shown, because both of the IPs that the Name Servers are set to are on the same network and this is our default setup.
Is this a standard approach for a hosting provider whose data centers are placed in US, Europe, and East.
Obviously they have a bespoke setup. Or, do they? What are the conventions, out of interest?
Currently I'm finalizing domain setup.
I appreciate that SOA related 'Warnings' can be ignored in some cases according to requirements.
I prefer TICK/GREEN - some configurations might be inconsequential, but if it's required according to compliance, then I prefer that, even if the positive has no impact at all. Maybe I'm a perfectionist.
Last edited by PTomas; 09-27-2014 at 09:50 AM.
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| Posted by byte32, 09-27-2014, 10:14 AM |
| Most people have their name servers on separate subnets, they most likely have your name servers also in the same datacenter since the way IP's are assigned.
Its best to have all of your nameservers on separate subnets and therefore most likely on a separate geo location. Data centers sometimes, if not always have main servers to route all the traffic. If there was network problems, it could be possible but unlikely the whole subnet could go down. Technically speaking however it is fine to run name servers on the same subnet, no problems with it - just it kinda removes the point if there's a chance both name servers can go down at the same time.
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| Posted by PTomas, 09-27-2014, 10:36 AM |
| Seems odd that a 'default setup' should be potentially prone to single point failure. I wouldn't think like this, as you rightly say. So there must be a reason, and there must be some sort of contingency in place. Certainly, likelihood is low ...
I'll ask them about this.
Last edited by PTomas; 09-27-2014 at 10:40 AM.
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| Posted by Server Management, 09-27-2014, 10:58 AM |
| Even if the IP's were in different subnets having them located locally on the server is still a point of failure. Very few hosts are running geographical name severs these days.
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