Re: Config check for box swith two nics

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Date: Mon, 21 Mar 2005 17:28:07 +0000
To: For users of Fedora Core releases <fedora-list@redhat.com>

GPL wrote:
> I may have been over thinking this. My internal DNS will resolve names
> on the internal net and external net. I think now in the way I have
> been reading the responses to this thread that I feel better about my
> understanding of this process.
>
> One thing though regarding the hosts file:
>
> 127.0.0.1 localhost.localdomain localhost
> 10.192.0.200 windmere.internaldomain.com windmere
> 208.x.x.x windmere.externaldomain.com windmere
>
> Is it bad practice to give the box two FQDNs per network? Would I
> experience any negative repercussions from approaching the setup in
> this manner?

That should be fine.

What I would do in this situation is install the caching-nameserver
package so that you resolve all names yourself. Then, add the following
entries to your named.conf to forward queries for internal names and
addresses to the internal DNS servers:

//
// Forward requests for internaldomain.com to intranet DNS servers
//
zone "internaldomain.com" {
        type forward;
        forward only;
        forwarders { 10.192.0.1; 10.192.0.2; };
};

//
// Similarly, forward rDNS lookups for internal network
//
zone "10.in-addr.arpa" {
        type forward;
        forward only;
        forwarders { 10.192.0.1; 10.192.0.2; };
};

The IP addresses in the "forwarders" lines should be those of your
internal DNS servers.

This means that you don't rely on your ISP's DNS servers for external
name resolution, and you can still resolve external names without delay
even if your internal DNS servers are unavailable.

Internal lookups will be referred to the internal DNS servers as before.

Your resolv.conf should just point to localhost. No external DNS servers
need to be mentioned there. Just make sure that named starts at boot time.

>>What routes other than those above do you want?
>
> The routes were what the box generated itself, I added no further
> routes. Works fine from what I have tested.

That's OK then.

Paul.

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• Previous message: Pierre Jouberp: "HP PSC 2175"
• In reply to: GPL: "Re: Config check for box swith two nics"
• Next in thread: Jeff Vian: "Re: Config check for box swith two nics"
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