Backup nameservers

I have been thinking about getting a separate cpanel account on a server located in a US data centre, as a backup of Nameservers only for my dedicated server in an AU data centre.

I am wondering if the only way you can synch nameservers though is is both are on a dedicated machine? ie that you have root access to whm on the 'extra' machine.

One providor I spoke to said they could only provide it on a dedicated machine, but not sure why.

Any thoughts?

 

thanks - much appreciated

I was thinking that the 'cpanel way' is probably the most straightforward with it's synching built in. Plus, if I set up an account with a cpanel reseller, I can then use that machine for extra non-au hosting if customers need it.

What you're saying about seeing that ip's are shared - - just clarifying - don't reseller accounts usually get allocated their own ip's on shared machine's? ie are you talking about ip's belonging to someone else's range of allocated ip's, or do you mean that the reverse dns on ip's will not be able to be set as 'mine'?

I think setting up slave / master may require root access (or at least access to actual zone files) on my dedicated machine - which I don't have - but then again, I may have missed the point on how this works.