[ILUG] DNS question

[Kevin Dobey]

> > I think you are a mite confused, or else you have not 
> stated what you need 
> > properly. Are you trying to run a DNS service for example.com?, is 
> > example.com a public domain, or just a local one?
> Sorry John, should have been clearer, trying to multitask at 
[Snip]
> example.com is an external domain, I want to host the web 
> service on a 
> machine in my DMZ,

I guess you mean point at your ip for the primary nameserver for example.com
?

Surely this is a really bad idea since you can't count on your ip address
staying the same. 
I notice mine changes frequently with IOL BB. some time while I am actually
active on the line. 

You might be better to just aim to host just "www" at example.com and thus
not host the DNS for the entire domain .....or am I wrong ??
I've been messing about with creating a subdomain and pointing that at my BB
router - as in "me_at_home.example.com" however even this is unreliable
(because of changing IP address. (but if you use some sticky tape a dynamic
dns entry and a CNAME entry it seems to work). 

Which reminds me - do DNS CNAMES have a time to live or does it inherit the
ttl of the name it's pointing too (looks like the latter to me). 

Rgds
Kevin
(No DNS expert what-so-ever)