[ale] OT: XO dns outage?

[Edward Holcroft]

Thanks for that explanation. I'll definitely be be looking into a backup
provider after this.

ed


On Sun, Sep 8, 2013 at 5:47 PM, Alex Carver <agcarver+ale at acarver.net>wrote:

> Nope, that's not how it works at all.  Your DNS provider is defined to be
> the authoritative resolver for your domain.  If someone perfroms a lookup
> on your domain, the chain of DNS servers passes the request onward from
> their computer to their ISP, the ISP server to it's backbone provider's
> servers, and upward through the chain until some DNS server somewhere says
> "I know who is the authoritative server for your request" and then it
> passes back down to that server (XO).  The top of the DNS chain can not
> resolve the lookup, it just knows who is supposed to be able to do that and
> proceeds to forward the request (or informs the original user's computer
> the final DNS server IP needed to perform the lookup.)  If XO's connections
> to all of their DNS servers go down you get what just happened, no lookups.
>  It's up to XO to have DNS servers on different connections in different
> locations in order to provide you stable service in the event of an outage.
>
> If you want guaranteed uptime then you need to do one of the following: 1)
> pressure XO to get extra servers somewhere else, 2) get additional DNS
> service with another provider to act as a backup DNS or 3) run your own DNS
> servers.
>
>
>
> On 9/8/2013 11:27, Edward Holcroft wrote:
>
>> They are back up now. 24 hour outage. Pretty bad communication from them
>> ... no notification on their website, no e-mail, nothing.
>>
>> We were dead in the water for that time, even our Google Apps was set up
>> to
>> resolve through them.
>>
>> How does this happen? Isn't the whole point of DNS that there are multiple
>> name servers globally so that an outage at one service provider does not
>> cause all our url's to stop resolving? This event leads me to conclude
>> that
>> our entire zone file was referenced only on the XO servers and nowhere
>> else. Can someone explain this?
>>
>> cheers
>> ed
>>
>>
>> On Sat, Sep 7, 2013 at 9:49 AM, Edward Holcroft <eholcroft at mkainc.com
>> >wrote:
>>
>>  Anyone aware of an outage at XO dns? I cannot connect to any of my
>>> servers, except by IP address.
>>>
>>> ed
>>>
>>> --
>>> Edward Holcroft | Madsen Kneppers & Associates Inc.
>>> 3020 Holcomb Bridge Rd. NW | Norcross, GA 30071
>>> O (770) 446-9606 | M (770) 630-0949
>>>
>>>
>>
>>
>>
>>
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-- 
Edward Holcroft | Madsen Kneppers & Associates Inc.
3020 Holcomb Bridge Rd. NW | Norcross, GA 30071
O (770) 446-9606 | M (770) 630-0949

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