[plug] DNS zone transfers

[Peter F Bradshaw]

Hi;

On Wed, 8 Dec 2004, James Devenish wrote:

> In message <Pine.LNX.4.58.0412081439470.12161 at goldmund.pri>
> on Wed, Dec 08, 2004 at 02:43:30PM +0800, Peter F Bradshaw wrote:
> > If I delete the zone files on the slave it will update from the master.
> > But it will not do so otherwise. What I want is for the slave to poll
> > the master about once a day or so.
>
> With slaves, you should be more interested in 'notifications' than
> 'polling'. This is because slaves should be receiving notifications from
> your master whenever the zone is updated and reloaded. When this occurs,
> they will compare serial numbers and perform any transfers that are
> necessary. All servers that are listed in the zone's NS records should
> be facilitated in this way. You may also have unlisted slaves, but they
> will only receive notifications if your server is configured explicitly
> for them. As Craig says, the solution is to a (a) maintain your SOA and
> NS records properly (b) don't forget to prompt your master to reload the
> revised zone information if you have modified it.

Thanks all. Had my master NS records set incorrectly. Works now.

>
> Note, of course, your workstations' usage and remote nameservers' usage
> is largely dictated by the TTLs and timeouts in your zone's SOA record
> (i.e. they do 'polling' and do not receive notifications). This means
> that clients and remote networks suffer from the infamous 'propagation
> delays'. Any primer on SOA records should explain the significance of
> timeouts and TTLs.
>
>

Cheers

-- 
Peter F Bradshaw, pfb at users.sourceforge.net, ICQ 75431157 (exadios).
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