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: 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
> 
> 
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> 
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> 

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


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