Bind9 / Cox reverse lookup

[Keith Smith]

Thanks Rusty for all your help!!



On 2015-10-06 09:57, Rusty Ramser wrote:
> "Thank you for your help!!"
> No worries, mate.  If I'm actually providing any help :) you're quite
> welcome.
> 
> 
> It sounds like to me you're wanting to use name-based virtual hosts on
> Apache.  Like thus:
> http://httpd.apache.org/docs/2.4/vhosts/name-based.html
> 
> If you will have one public IP address for your multiple domains (aka, 
> web
> sites), then you will need an entry in an external DNS hoster for each.
> Each domain DNS record will point to the same public IP address (your 
> single
> web server).  And then it will be up to your Apache server to see
> www.wheresmycar.net, www.dogsmakingfaces.com, and 
> www.localbeerspecials.com
> serve up the appropriate web site.  (Note:  I'm just guessing that 
> those are
> the three web sites you're using; don't know for sure.)
> 
> Your web server's non-routable internal IP address shouldn't really 
> ever
> come into play during normal usage scenarios.  Sure, if you enter the 
> IP
> locally on your system you'll get the default page, but that's not 
> really
> what external users will ever do.  Once you have external DNS host 
> records
> set up for each domain, you should be able to test the name-based 
> Apache
> functionality.  Or, if you want to do that locally before advertising
> external DNS addresses you should be able to make some temporary 
> /etc/hosts
> entries on your web server which all point to its non-routable IP, just 
> as a
> test.
> 
> 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 12:27
> To: Main PLUG discussion list <plug-discuss at lists.phxlinux.org>
> Subject: RE: Bind9 / Cox reverse lookup
> 
> 
> Thank you for your help!!
> 
> Cox provides the public / routable  IP  which is set on my router / 
> modem.
> 
> I have a web server that servers several websites.  I use NAT for port
> forwarding to that one box.
> 
> Without a DNS server, either local or external, how will Apache know 
> which
> site to server up?  If I put the IP in my browser I get the default
> "website" which is no website at all - it is the default welcome page.
> 
> 
> -----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 12:10
> To: 'Main PLUG discussion list' <plug-discuss at lists.phxlinux.org>
> Subject: RE: Bind9 / Cox reverse lookup
> 
> I'm not sure that's a valid assumption, regarding needing a DNS server 
> even
> with that functionality.  Maybe it is in your specific use, but it 
> doesn't
> strike me as a guaranteed necessity.
> 
> The learning aspect of it, however, is something I can't debate.  If 
> that's
> part of your goals, then by all means run wild with it.  :)
> 
> 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 12:03
> To: Main PLUG discussion list <plug-discuss at lists.phxlinux.org>
> Subject: RE: Bind9 / Cox reverse lookup
> 
> 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.
> 
> 
> 
> -----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 11:53
> To: 'Main PLUG discussion list' <plug-discuss at lists.phxlinux.org>
> Subject: RE: Bind9 / Cox reverse lookup
> 
> 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?)
> 
> 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