[no subject]

> On Fri, Dec 10, 2004 at 10:44:33AM -0500, Cordell, Ron wrote:
>> Hi all,
>
>> I was hoping to draw on your expertise to get an idea of some best
>> practices for DNS.
>
>> I'm trying to determine if it is best to have one DNS server, or
>> multiple DNS servers for an environment. The environment consists of a
>> few hosts in a DMZ, with many hosts behind a firewall (behind the DMZ).
>> The hosts behind the firewall are divided up into vLANs, and are in
>> several subdomains. Does it make sense to put a single DNS server in the
>> DMZ, and use that, or would you recommend putting the server elsewhere?
>> If machine resources are scarce, I don't want to have to create a lot of
>> DNS servers.
>
>> I appreciate any suggestions.
> If your firewall is good, i.e., someone on the Internet cannot spoof
> packets to appear to come from your DNS server, then one DNS server
> (or a pair for redundancy) in the DMZ should suffice, assuming it is
> running on a hardened Linux or UNIX system.
>
> Of course, you'll want to ensure that your internal DNS entries cannot be
> obtained by anyone from the Internet.  Of course, properly configuring
> a DNS server is non-trivial.  You'll also want to ensure that it's kept
> up-to-date w.r.t. security patches.

You can also use tiny DNS if security is imperative. TinyDNS is super easy
to setup, and contains the essentials required to run DNS. There is
a $500 reward to exploit it, and no one has claimed the cash yet.

>
>> -ronc
>
> Bob Toxen
> Fly-By-Day Consulting, Inc.
> "Your expert in Firewalls, Virus and Spam Filters, VPNs,
> Network Monitoring, and Network Security consulting"
>
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<li><strong><a name="00643" href="msg00643.html">[ale] DNS best practices</a></strong>
<ul><li><em>From:</em> jdr at xcorps.net (Jonathan Rickman)</li></ul></li>
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<li><strong><a name="00429" href="msg00429.html">[ale] DNS best practices</a></strong>
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<li><strong><a name="00441" href="msg00441.html">[ale] DNS best practices</a></strong>
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