Interesting Email Server Setup Article from Redhat

[Jay Nugent]

Greetings,

On Thu, 7 Dec 2006, David Bandel wrote:

> On 12/6/06, James McDonald <james at jamesmcdonald.id.au> wrote:
> > http://www.redhat.com/magazine/025nov06/features/email/index.html#parttwo?sc_cid=bcm_edmsept_007
> >
> 
> <rant>
> Why do folks insist on using the word "propagate" to talk about DNS?
> DNS is _passive_ not _active_.  DNS doesn't "propagate" anything.  In
> DNS, caches time out and when they do, the updated information is
> retreived.  But nobody else's DNS server contacts mine to propagate
> (broadcast, circulate, transmit) anything.  Even my master DNS server
> doesn't broadcast changes to the slaves, it only signals the slaves
> that something has changed.  The slaves then request the information
> out of cycle, but the master doesn't just broadcast it.
> </rant>
> 
> David A. Bandel

   You are not alone David.  Pisses me off, as well!  And it tends to 
'propogate' this missunderstanding to the masses of newbies who then begin 
to believe what they've heard and then THEY repeat it.  Hard to retrain 
them when they've heard this misinformation from so many sources :(

   Everything in DNS is done *upon request*.  Records get into my cache
because I have specifically ASKED for them.  As you said, nothing
automatically flows without first being requested.  It's an on demand
system.

      --- Jay
             
"Getting rid of terrorism is like getting rid of dandruff.  It cannot
 be done completely no matter how hard you try." -- Gore Vidal
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