question about ttl value

phn at phn at
Wed Oct 16 07:29:12 UTC 2002

John Smith <nospam at> wrote:
> Hello,

> I am new to bind. I would like to know the difference of TTL given before
> SOA record and after expiration time.

It's decribed in RFC2308.

The TTL of the SOA itself ( second column before 'SOA') tells other
nameservers how long that can cache the SOA. The last parameter
of the SOA tells other nameservers how long to cache a negative
answer for this zone.

> John

Peter Håkanson         
        IPSec  Sverige      ( At Gothenburg Riverside )
           Sorry about my e-mail address, but i'm trying to keep spam out,
	   remove "icke-reklam" if you feel for mailing me. Thanx.

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