RE: Modified Split DNS Question

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> -----Original Message-----
> From: shrike-list-admin@xxxxxxxxxx 
> [mailto:shrike-list-admin@xxxxxxxxxx] On Behalf Of Jake McHenry
> Sent: Friday, October 10, 2003 12:11 AM
> To: shrike-list@xxxxxxxxxx
> Subject: RE: Modified Split DNS Question
> 
> 
> > -----Original Message-----
> > From: shrike-list-admin@xxxxxxxxxx
> > [mailto:shrike-list-admin@xxxxxxxxxx] On Behalf Of Jake McHenry
> > Sent: Thursday, October 09, 2003 9:30 PM
> > To: shrike-list@xxxxxxxxxx
> > Subject: RE: Modified Split DNS Question
> > 
> > 
> > I have a public IP, both forward and reverse dns. This is my
> > business, not a home account. Here's what I'm trying to do, 
> > maybe I should have explained a little better from the start.
> > 
> > I have one dns server, 192.168.1.98. It's with the rest of
> > the machines in my main office, behind our firewall. It hosts 
> > nittanytravel.com, buchanantravel.com, and 
> > gulliverstravel.biz. Everything is set up fine in dns and working.
> > 
> > My boss was looking through the logs I have set up and saw
> > that ntlh.nittanytravel.com (the hostname of the server) had 
> > roughly 4000 hits so far in October. I told him it was 
> > because all of the machines in our main office are going out 
> > the firewall, then right back in. They're using an external 
> > dns server. So, all of those hits are getting the ip of the 
> > router in the logs, being 141.151.228.247. I have that ip 
> > address set up in dns linked to all of my domains.
> > 
> > I then added int.nittanytravel.com and added a allow-query
> > rule in named.conf to only allow the internal machines to our 
> > main office to get to this private dns. It's all in the same 
> > server, just different zones.
> > 
> > Even after setting all of my machines behind the firewall to
> > use the local dns server, they are still going outside, then 
> > back through the firewall, getting the 141 address and 
> > showing up as ntlh.nittanytravel.com in the logs, because 
> > that's what I have nittanytravel.com's address set to in dns.
> > 
> > I finally got all the machines to contact the server, placing
> > their private ip in the logs instead of 141.. by modifying 
> > the hosts file on each machine. I didn't want to do this, but 
> > it works.
> > 
> > Problem 1: Is there a way for me to configure dns so that the
> > machines will talk directly to the server instead of using 
> > the hosts file?
> > 
> > Problem 2: Locally on the server, I can only ping either
> > private, or public, by modifying the search and domain lines 
> > in /etc/resolv.conf. Is there a way that I can see both 
> > without modifying this file?
> > 
> > 
> > 
> > I think that's it. If anyone has any questions to help answer
> > mine, I'll do my best to answer them.
> > 
> > Thanks,
> > Jake
> > 
> > 
> > -----Original Message-----
> > From: shrike-list-admin@xxxxxxxxxx
> > [mailto:shrike-list-admin@xxxxxxxxxx] On Behalf Of John Haxby
> > Sent: Thursday, October 09, 2003 5:50 PM
> > To: shrike-list@xxxxxxxxxx
> > Subject: Re: Modified Split DNS Question
> > 
> > Jake McHenry wrote:
> > 
> > >One other question. I only have one dns server as of right
> > now, behind
> > >a firewall. If any machines that are behind the firewall with the
> > >server,
> > they
> > >are going to that server for dns, which is pointing to a public
IP.
> > >
> > >This is why I wanted to set the search and domain to search for
the
> 
> > >private stuff first.
> > >
> > >The only way I have been able to get around the public IP
> > showing up in
> > >the logs for what should be the private machines is putting
> > the ip and
> > >domain names in the hosts files on the client machines.
> > >
> > >Does anyone know of a way to get around using the hosts
> > files on each
> > >individual machine?
> > >  
> > >
> > 
> > I'm not entirely sure what you are trying to achieve.   
> > However, I have 
> > a similar set up.   My ISP gives me a domain and a fixed IP 
> > address.   
> > For my internal nameserver, I just put the various machines
> > at home in 
> > that domain, that all have 192.168.0.x IP addresses.
> > 
> > So, if the name that my ISP gives me is home.example.com, then the
> IP 
> > address associated with this connects to my firewall.    I 
> > simply treat
> > home.example.com as an SOA (start of authority) and assign 
> > names and IP 
> > addresses within that domain.   My children's PC, for 
> > example, is called 
> > sprog.home.example.com and has a 192.168.0.x IP address.   
> > The firewall 
> > is home.example.com on the outside (with its public IP address)
and 
> > fluffy.home.example.com on the inside with it's 192.168.0.x IP 
> > address.   My resolv.conf simply contains "search 
> > home.example.com".   
> > These internal names aren't visible from the outside for two 
> > reasons: my 
> > ISP doesn't have NS records pointing to my nameserver and my 
> > nameserver 
> > isn't accessible through the firewall.   Really, it's the NS
record 
> > associated with home.example.com that would glue my domain 
> > into the DNS 
> > as a whole, and that is the *only* difference between what I have
> and 
> > what the nameserver at work has.
> > 
> > If you're interested, I can send you a copy of my nameserver
> > configuration files, but it's a staightforward set up.  You can
get 
> > everything you need from the Cricket book (DNS and Bind, 
> > Cricket Liu and 
> > Paul Albitz (I think), published by O'Reilly).
> > 
> > jch
> > 
> > 
> > --
> > Shrike-list mailing list
> > Shrike-list@xxxxxxxxxx 
> > https://www.redhat.com/mailman/listinfo/shrike> -list
> > 
> > 
> > --
> > 
> > Shrike-list mailing list
> > Shrike-list@xxxxxxxxxx
> > https://www.redhat.com/mailman/listinfo/shrike-list
> > 
> 
> Sorry everyone, I have seen the light and following. For all those
> people out there that don't responde to top posts, please consider
> reading what I sent above... I don't want to resend it and face the
> jury again....
> 
> Thanks,
> 
> Jake McHenry
> Nittany Travel MIS Coordinator
> http://www.nittanytravel.com
> 
> 
> -- 
> Shrike-list mailing list
> Shrike-list@xxxxxxxxxx
> https://www.redhat.com/mailman/listinfo/shrike-list
> 

I think I got everything working on the server, I can ping both sides
now. I had a typo. Sorry everyone.

My second question still stands though, is there a way for me to have
dns work for all the client machines without using the hosts file on
the windows boxes? I have to have the public ip in my dns records,
otherwise no one would be able to get to it. And if I don't have the
hosts files configured on the client windows machines, they get the
public address for the domain.

So unless I'm missing something, I either have to set up all the
client machines hosts files, or set up all the client machines to go
to the int.nittanytravel.com domain instead of the regular
nittanytravel.com domain.

I think I'll stick with the hosts files because that way I can have
them download the file when they log into the domain. I can't really
update their favorites, and shortcuts on desktops as easily.

So unless someone knows a way around all this, I guess this is how I'm
going to do things. :-/



Jake McHenry
Nittany Travel MIS Coordinator
http://www.nittanytravel.com


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