[dns-operations] Advance notice - H-root address change on December 1, 2015

Ken Peng kpeng at runbox.com
Tue Sep 1 01:27:19 UTC 2015

Thanks Dave. they are caching resolvers ,not forwarders.
We now try to upgrade BIND servers. Thx again.

On 2015/9/1 星期二 9:13, Dave Warren wrote:
> On 2015-08-31 17:53, Ken Peng wrote:
>> Hello,
>> Cache only nameservers have no hints file, will they be influenced as
>> well? I saw the version is:
>> ~# named -v
>> BIND 9.8.1-P1
> Do you resolve or forward queries? If you forward everything, only the
> upstream resolver needs to be updated, you have nothing more to worry
> about.
> If you're a caching resolver without a forwarder, you need a hints
> update; if you don't have a hints file on disk then BIND is using a
> compiled-in default set of root server hints which can be updated by
> updating BIND.
> Even if you have an outdated hints file (whether on disk or compiled in)
> BIND will attempt to update it from the other known root servers upon
> startup, so while an out of date hints file isn't ideal, it won't cause
> any major harm. Worst case, BIND will try to update from the outdated
> H-root IP, timeout, then hit another root and remember that updated
> hints until BIND is restarted.
> While it's a good idea to get your hints updated regardless, if you
> don't have a hints file on disk anywhere then regular routine patching
> and updates should take care of it, and if you don't even do that, your
> server will still work.
> (I have no recollection of which version of BIND first had compiled in
> hints)

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