Bind9 / Cox reverse lookup

[Keith Smith]

On 2015-10-06 08:52, Rusty Ramser wrote:
> From the scenario you describe, no, I don't see that creating your own
> reverse lookup zone would be necessary.
> 
> Your web server has no other internal systems in your environment to 
> look
> up.  And for external reverse lookups using the public information 
> (from
> Cox, Google, OpenDNS, or whatever your preference) should be fine.  I
> wouldn't create something that would just require extra
> management/maintenance when there's no real use case for it.
> 
> (Actually, for just a single box that is only accepting NATed web 
> traffic,
> I'm not even sure I understand the need for a forward lookup zone on 
> your
> server.  Is there some reason that its client DNS configuration can't 
> just
> point to your preferred DNS provider?  Do you really need a DNS server
> functioning on the box?)
> 


I assume I need a DNS server since the box is a web server and will be 
hosting a couple websites and there will be email as well.  And part of 
the reason I am doing this is to learn.


> Cheers.
> 
> 
> -----Original Message-----
> From: plug-discuss-bounces at lists.phxlinux.org
> [mailto:plug-discuss-bounces at lists.phxlinux.org] On Behalf Of Keith 
> Smith
> Sent: Tuesday, October 6, 2015 11:14
> To: Main PLUG discussion list <plug-discuss at lists.phxlinux.org>
> Subject: RE: Bind9 / Cox reverse lookup
> 
> 
> Thanks Rusty.
> 
> It is one box.  It is on a non-routable IP.  I use NAT for ports 80, 
> 443,
> 53... etc.
> 
> So are you saying I need to make a reverse lookup for the non-routable 
> IP?
> 
> Thanks!!
> Keith
> 
> 
> -----Original Message-----
> From: plug-discuss-bounces at lists.phxlinux.org
> [mailto:plug-discuss-bounces at lists.phxlinux.org] On Behalf Of Rusty 
> Ramser
> Sent: Tuesday, October 6, 2015 11:05
> To: 'Main PLUG discussion list' <plug-discuss at lists.phxlinux.org>
> Subject: RE: Bind9 / Cox reverse lookup
> 
> Hi, Keith.
> 
> Will your environment be needing to do internal lookups based upon IP?  
> For
> instance, are you using a non-routable set of IP addresses (e.g., 
> 10.x.x.x,
> 192.168.x.x) for your environment behind NAT, and will those systems 
> need to
> perform name resolution of each other based upon IP?  If so, yes, 
> you'll
> want to have your own internal reverse lookup zone because obviously 
> Cox (or
> any other public DNS provider) will not have that information.
> 
> If you really don't need any internal reverse name resolution, then 
> there
> may be no need to create a zone.  For instance, there isn't an 
> "environment"
> of servers you have, it's just this single web server.  And the web 
> server
> doesn't have any internal network it sits on, it's just got a public,
> routable IP address.
> 
> Cheers.
> 
> 
> -----Original Message-----
> From: plug-discuss-bounces at lists.phxlinux.org
> [mailto:plug-discuss-bounces at lists.phxlinux.org] On Behalf Of Keith 
> Smith
> Sent: Tuesday, October 6, 2015 10:11
> To: Main PLUG discussion list <plug-discuss at lists.phxlinux.org>
> Subject: Bind9 / Cox reverse lookup
> 
> 
> Hi,
> 
> I'm configuring Bind9 on my web server connected to Cox.  Cox 
> configures the
> IP reverse lookup.
> 
> Do I still need to create a reverse zone file?
> 
> The reverse zone file is to lookup the host by IP correct?
> 
> Thank you for your help!!
> 
> Keith
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-- 
Keith Smith