TTL question

[Barry Margolin]

In article <9pses5$lnv at pub3.rc.vix.com>, phroGg ^''^ <fake at email.com> wrote:
>Hello,
>
>I've a quick question about TTL (using Bind8.2.5 under Win2K).  In the zone
>file, there are two TTL values I question: The "$TTL" one at the top, and
>the one within the SOA parantheses.  What do they do differently?  I
>understand the concept of TTL as a generality.  I know that one is a
>"default", for records that don't have a TTL explicitly defined, but I'm not
>sure which one is this "default", and I'm not sure what the other one is for
>(whichever one is the "other one").  So, if anyone can help with this,
>that'd be great.

$TTL specifies the default TTL for records that don't have an explicit TTL.

The MinTTL field in the SOA record is used as the TTL of "negative"
entries, i.e. it specifies how long a caching server should remember that a
name in that domain doesn't exist.

Before the $TTL directive was introduced in BIND 8.2, the MinTTL field was
used as the default TTL.

-- 
Barry Margolin, barmar at genuity.net
Genuity, Woburn, MA
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