Negative caching config

[Michele Chubirka]

Okay, but I can't *increase* someone else's TTL with these settings, can I?
If my max-cache-ttl is set to 2 hours and a record from an outside
server/zone has a TTL of 1 hour, then it will live for 1 hour, right? And
the same for max-ncache-ttl?

-----Original Message-----
From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org] On Behalf
Of Kevin Darcy
Sent: Thursday, March 04, 2004 6:30 PM
To: comp-protocols-dns-bind at isc.org
Subject: Re: Negative caching config


No, max-ncache-ttl only limits the negative caching of answers you get 
*from* other nameservers/resolvers. What you set in your zone files are 
the negative-caching values you give *to* other nameservers/resolvers. 
They have no effect on each other.

                                                                         
                                                                  - Kevin

Michele Chubirka wrote:

>By setting the negative TTL in named.conf, doesn't that override any
>settings in the individual zone files?
>
>----- Original Message -----
>From: "J Marquez" <sunsol19712003 at yahoo.es>
>To: "Barry Margolin" <barmar at alum.mit.edu>;
><comp-protocols-dns-bind at isc.org>
>Sent: Thursday, March 04, 2004 3:36 AM
>Subject: Re: Negative caching config
>
>
>  
>
>>Thank you very much Barry.
>>
>>Best regards!
>>Barry Margolin <barmar at alum.mit.edu> wrote:
>>In article ,
>>J Marquez wrote:
>>
>>    
>>
>>>We are pretty new by configuring DNS. We would like to activate
>>>      
>>>
>"negative
>  
>
>>>cache" in our Cache DNS's. We have searched the archives to look for a
>>>specific procedure, but haven't found anyone (sorry, if this question is
>>>      
>>>
>>All BIND 8 or 9 releases from the last 5 years implement negative
>>caching by default; you don't have to do anything to enable it.
>>
>>    
>>
>>>alredy solved in one of them). We think we have to add
>>>"max-ncache-ttl
>>>in named.conf but not sure if its necessary additional steps or it does
>>>matter the position of this line inside named.conf
>>>      
>>>
>>"max-ncache-ttl" just allows you to set a cap on the negative cache
>>time. It's not normally needed.
>>
>>    
>>
>>>Also for a cache DNS, what would be the ideal TTL for Negative Cache?
>>>      
>>>
>>That's not controlled on the caching DNS, it's set in the SOA records of
>>the domains.
>>    
>>