Nameservers: Dedicated vs Shared IPs

[drwhiz]

Right, this might seem really dumb but i would really like some decent advice on this and am sure there are many out there who are curious like me,

Now, whenever we are setting up reseller accounts, they would like their own private IPs for their nameservers and act as A entries. Until of late, i always had the impression that each nameserver must have its own authoritative IP. Recently, i stumbled upon that multuple nameservers can be setup using the same IPs. I then did a lookup on all regarding this and figured the term coined for this is that they were stealth nameservers. Though DNS report claims that catastrophes could strike(doh!) if there should be a TTL discrepancy and some other resellers facing sporadic resolvings for their sites and some even claiming that certain ISPs cannot resolve to such sites, i would really like to know the extent of this kind of setup;

In touching base:

1) How badly damaging can stealth nameservers be for the proper functioning of all services?

2) What is a TTL discrepancy(difference of TTL entries between various nameservers) and if one occurs, what would the outcome be?

3) If this is alright to be setup, what would be a recommended number of stealth nameservers we can "host" on normal dedicated nameservers?

4) Lastly, are setting up such nameservers ethical and how is it perceived in the reseller world? Does this make you look bad?

With the constant clamping down of IP usage by DCs and service providers, it would be great if we could use 2 IPs to have many pairs of private nameservers. However, i am hopeful that we can learn about the side effects of this method of deployment before looking just one way.

Any sageful enlightenment on this issue will be very much appreciated. ..

 

[drwhiz]

awritey then,,13 views and no replies. Dumb question of the week>>? guess we have a winner here

Thanks folks, guess i shall get back to my books,

 

[sawbuck]

If you want help with this might try contacting "cyberspirit" on this forum as his knowledge of dns is evident by this post dealing with TTLs and such.
http://forums.cpanel.net/showthread.php?s=&threadid=20480&perpage=15&pagenumber=1

 

[ramprage]

I would give them their own IP, causes less problems IMO. Having your own IP will allow the host to give their clients IP/~username access so if the client types in IP they will gets resellers site and not yours.

 

[drwhiz]

Originally posted by ramprage
I would give them their own IP, causes less problems IMO. Having your own IP will allow the host to give their clients IP/~username access so if the client types in IP they will gets resellers site and not yours.

That is true and concurred with. However, you can always have an anonymous site as with your nameservers to overcome that. Also, with the agreement of the resellers purchasing the services, mutual notification can be made to allow these, with a nominal fee to discourage them from getting private IPs, in order to better maximize use of IPs.

 

[bangsters]

how do you set up stealth nameservers?

I've been looking into this also, as I've been provisioned only two IPs by my DC. And I want my resellers to have their own nameservers, with the ip address the same as my nameserver's ip address....

 

[drwhiz]

hello bangsters,,nice nick btw, This methodology works fine and i don't have any complaints with four resellers that i have tried with. However, you cannot call them private nameservers as obviously they have themselves their own name. This could work their way with most newbies, but those resellers who know what they are doing can easily look up dnsreport to see what they are missing.

After all the bright red highlights do cause some panic!. And i also noted that the time to resolve is relatively longer since these are not authoritative entries.