[plug] DNS zone transfers

[Adam Hewitt]

I hate to admit this, but you could always use TinyDNS and never have to
worry about TTL's, Serial numbers or propegation to secondary servers.

And it is very, very fast...

Adam.

> -----Original Message-----
> From: plug-bounces at plug.linux.org.au 
> [mailto:plug-bounces at plug.linux.org.au] On Behalf Of Peter F Bradshaw
> Sent: Wednesday, 8 December 2004 10:57 PM
> To: plug at plug.linux.org.au
> Subject: Re: [plug] DNS zone transfers
> 
> 
> 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). PGP public key at 
> http://members.iinet.net.au/> ~exadios/public_key.html
> "Needs 
> more salt" - Archimedes 
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