Date: 17 Jun 2003 22:15:32 -0400 From: Chris Shenton <chris@shenton.org> To: JacobRhoden <jrhoden@unimelb.edu.au> Cc: freebsd-questions@freebsd.org Subject: Re: Two DNS servers with one IP address Message-ID: <87wufkjfln.fsf@PECTOPAH.shenton.org> In-Reply-To: <200306181208.28443.jrhoden@unimelb.edu.au> References: <00c101c3353c$4ecbe100$0100a8c0@ibacsoft.dynu.com> <200306181208.28443.jrhoden@unimelb.edu.au>
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JacobRhoden <jrhoden@unimelb.edu.au> writes: > On Wed, 18 Jun 2003 11:52 am, Alfonso Romero wrote: > > Is it possible to have two DNS servers with only one public IP address? I > > have a FreeBSD gateway connected to the Internet with a DSL modem, using > > natd to connect the other PCs on my LAN, and was wondering if I could have > > two DNS servers to register domain names. > > No its not. If you really wanted two seperate nameservers on 1 machine (which > are both accessable to the world) you will need to have two static ips at > that box. What are you trying to do? Serve one set of data to the Internet (world) and a different set to your internal LAN? This is common for hiding internal host/address information. It's usually called "split dns" or "split brain" or "split horizon". I believe BIND can do this, but I haven't used it for this. I've been using the "djbdns" suite which has this built in. Each record can be tagged with a label which can be associated with a set of addresses (e.g., inside LAN, anyone else) and it will reveal or hide that record based on the requestor's address. djbdns is a rather different architecture than BIND so if you're used to BIND it's a bit of a learning curve. If you're not wedded to BIND, you might be interested in djbdns. Check www.djbdns.org, the record label you want is the percent sign.
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