what does "max-ncache-ttl 0;" mean?

[A. Renald Niswady]

hehehe, 

http://www.zytrax.com/books/dns/ch7/hkpng.html#max-ncache-ttl 

i found zytrax site is really helpful 


Regards 
-Renald- 

----- Original Message -----

From: "John W. Blue" <john.blue at rrcic.com> 
To: "A. Renald Niswady" <renaldre at orion.net.id>, "blrmaani" <blrmaani at gmail.com> 
Cc: comp-protocols-dns-bind at isc.org 
Sent: Wednesday, March 2, 2016 2:27:49 PM 
Subject: RE: what does "max-ncache-ttl 0;" mean? 



Now quote your source. 



;) 




From: bind-users-bounces at lists.isc.org [mailto:bind-users-bounces at lists.isc.org] On Behalf Of A. Renald Niswady 
Sent: Wednesday, March 02, 2016 1:23 AM 
To: blrmaani 
Cc: comp-protocols-dns-bind at isc.org 
Subject: Re: what does "max-ncache-ttl 0;" mean? 





max-ncache-ttl sets the maximum time (in seconds) for which the server will cache negative (NXDOMAIN) answers (positives are defined by max-cache-ttl ). The default max-ncache-ttl is 10800 seconds (3 hours). max-ncache-ttl cannot exceed 7 days and will be silently truncated to 7 days if set to a greater value. This statement may be used in view or a global options clause. 





Regards, 
A. Renald Niswady 
[NOC-System] Orion Cyber Internet 



PT Orion Cyber Internet 
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Telp: 021 5265566 - Fax: 021 6280883 
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----- Original Message -----



From: "blrmaani" < blrmaani at gmail.com > 
To: comp-protocols-dns-bind at isc.org 
Sent: Wednesday, March 2, 2016 2:13:29 PM 
Subject: what does "max-ncache-ttl 0;" mean? 





man pages for named.conf says "max-ncache-ttl <integer>" and only talks about default values and max values - no mention of minimum-value. 





Does "max-ncache-ttl 0;" mean never cache negative queries (queries resulting in NXDOMAIN) or does it mean cache negative queries forever? 





Too lazy to test this option or look bind code :), hence posting here - apologies in advance..!! 





Blr 
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